TrapPro User Manual
Contents
1. slide along the 6 TrapPro User Manual December 2010 1 3 Trap types spread choke centerline in a series of smaller less noticeable steps The point at which the trap begins to slide is controlled by Sliding traps color limit as described on page 18 b Sliding trap Notice how the trap does not have an abrupt shift in direction a Normal trap Notice the abrupt shift from spread to choke Figure 1 4 Normal traps a and sliding traps b 1 3 5 Proportional traps TrapPro uses proportional traps when trapping against objects that become thinner as illustrated in Figure 1 5 This prevents the trap straying into an adjacent area in the case of the diagram this would be the white area of the page Proportional traps are created automatically by TrapPro so there are no user settings to configure Figure 1 5 Image using narrowed proportional traps TrapPro User Manual December 2010 1 Introduction 1 3 6 Small object protection traps TrapPro protects small thin objects such as small text when traps are applied to them Figure 1 6 a shows how objects can be completely hidden by the trap when small object protection is not used Figure 1 6 b shows the same text trapped with small object protection enabled Notice how the text remains visible throughout For more information see the control for Small object protection factor on page 18 a Small element b Small element protection used protection not us2. From the list of RIP extras select TrapPro and click Add 4 In the Enable Feature dialog that appears enter your TrapPro password and click OK 5 Click OK to close the Configure RIP Extras dialog and OK to close the Configure RIP dialog TrapPro should now be enabled in the RIP but to ensure the RIP is correctly configured to process jobs you should reserve additional memory for the RIP for trapping purposes as described next 2 2 Reserving memory for trapping The trapping process will fail if the RIP does not have enough internal memory RAM to process a job without resorting to page buffering To avoid this you should allocate extra memory to the RIP or if the RIP is using all available memory then increase the amount of memory RAM on the computer The default settings after installation are that the RIP already has all available memory assigned to it It is therefore only feasible to increase memory without physically installing more if the default settings have previously been changed TrapPro User Manual December 2010 2 2 Reserving memory for trapping Initially a little trial and error may be required to find the optimum memory settings but adding an additional 256 MB to the RIP is a good place to start The procedure for allocating additional RIP memory is as follows 1 Inthe RIP select Harlequin RIP gt Configure RIP to open the Configure RIP dialog Figure 2 1 2 Click Options to open the Configure RI
3. P Options dialog Figure 2 3 Configure RIP Options Automatic prep loading e g Aldus Apple Startup prep Disk space leftfor system Minimum memory lett for system 106455 Per renderer memory Minimum compression ratio Memory for RIP Memory reserve for RIP Kb Allow use of all available memory Allow stap start Disable sounds Figure 2 3 Configure RIP Options If the Memory for RIP option is not selected the RIP is allocated all the available physical memory less the amount specified in the Minimum memory left for system field The Minimum memory left for system field lets you reduce the allocation for the RIP so that the memory is left for the operating system and any other running applications If the value is too small the operating system will start paging which will degrade performance 3 With the Memory for RIP check box selected enter your memory require ments in the adjacent box So to add an extra 256 MB for trapping pur poses add 262144 the equivalent of 256 MB to the figure already there TrapPro User Manual December 2010 13 2 Enabling TrapPro 4 Ensure Allow use of all available memory is selected as this will allow all free memory to be made available to the RIP this option is not available in Mac OS The Configure RIP Options dialog should now look similar to Figure 2 4 Configure RIP Options Automatic prep loading
4. TrapPro User Manual Harlequin PLUS Server RIP December 2010 the smarter alternative GLOBAL GRAPHICS the smarter alternative GLOBAL GRAPHICS Copyright and Trademarks TrapPro User Manual December 2010 Part number GGS TrapPro 1 3 Document issue 112 Copyright O 2010 Global Graphics Software Ltd All rights reserved Certificate of Computer Registration of Computer Software Registration No 2006SR05517 No part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the prior written permission of Global Graphics Software Ltd The information in this publication is provided for information only and is subject to change without notice Global Graphics Software Ltd and its affiliates assume no responsibility or liability for any loss or damage that may arise from the use of any information in this publication The software described in this book is furnished under license and may only be used or copied in accordance with the terms of that license Harlequin is a registered trademark of Global Graphics Software Ltd The Global Graphics Software logo the Harlequin at Heart Logo Cortex Harlequin RIP Harlequin ColorPro EasyTrap FireWorks FlatOut Harlequin Color Management System HCMS Harlequin Color Production Solutions HCPS Harlequin Color Proofing HCP Harlequin Error Diffusion Scree
5. abled then a PDF job containing trapping parameters via PJTF structures will be trapped as dictated by those parameters TrapPro User Manual December 2010 9 1 Introduction 10 TrapPro User Manual December 2010 2 Enabling TrapPro TrapPro is supplied with the Harlequin RIP and needs to be enabled before it can be used 2 1 Enabling TrapPro To enable TrapPro use the Configure RIP Extras dialog as follows 1 Start the RIP and select Harlequin RIP gt Configure RIP to open the Configure RIP dialog Figure 2 1 Configure RIP Workspace folder Page buffer folder Page buffering Network buffer Printer buffer Job timeout Configure threads C Program FilestHarequinRIP 8 1 beta GenericiSWWorkSpace CAProgram FilestHarequinRIP 8 1 beta GenericiSWAPageBuffers Multiple Parallel v Compress page buffer Kb 20480 Kb 6000 minutes Perprocessorcore Figure 2 1 Configure RIP dialog TrapPro User Manual December 2010 1 2 Enabling TrapPro 12 2 Click the Extras button to open the Configure RIP Extras window shown in Figure 2 2 Configure RIP Extras HDS light Dispersed Screening low res HMS Micro Screening HCS Chained Screening HDLT Harlequin display list technolo TIFFAT Harlequin ColorPro PostScript PDF Media Savina Try Before You Buy Trial code Evaluation is not enabled Cancel Figure 2 2 Select TrapPro in Extras 3
6. age Setup Output Device Device Preview ProofRead Separations Screening amp Color Style CMYK Composite Color No Color Management Trapping Method TrapPro Preferences Highlighted Traps Calibration amp Dot Gain Calibration None Tone Curves None E Intended Pre Actual Press Cassette amp Page La Page layout Imposition None Resolution Vertical 100 0 Horizontal 1000 Override resolut Processing Optimization Non Enable Featu Rotate Scaling Wertical Horizontal PDF Options XPS Options OK TrapPro User Manual December 2010 3 4 Monitoring TrapPro in the Harlequin RIP The other trapping methods supported by the RIP are as follows None Disables in RIP automatic trapping including traps defined with QuarkXPress settrap function However any traps defined in PostScript LanguageLevel 3 will still be trapped To disable all trapping you can use the Disable Trapping feature supplied in the SW Page Features Examples folder It use it copy it to the Page Features folder and choose it in the Enable Feature drop down list in your page setup Settrap Quark Use this option to have the RIP generate over printed borders according to instructions embedded in suitable jobs by QuarkXPress Note This option does not affect vector art left unaf fected by the trapping options in QuarkXPress 3 4 Monitoring TrapP
7. and Postpress CIP4 Job Definition Format JDF and the CIP4 logo are trademarks of CIP4 Adobe Adobe Photoshop Adobe Type Manager Acrobat Display PostScript Adobe Illustrator PostScript Distiller and PostScript 3 are either registered trademarks or trademarks of Adobe Systems Incorporated in the United States and or other countries which may be registered in certain jurisdictions Soy wy Global Graphics Software Ltd is a licensee of Pantone Inc PANTONE Colors generated by ScriptWorks are four color process simulations and may not match PANTONE identified solid color standards Consult current PANTONE Color Publications for accurate color PANTONE Hexachrome and PANTONE CALIBRATED are trademarks of Pan tone Inc Pantone Inc 1991 Other brand or product names are the registered trademarks or trademarks of their respective holders US Government Use Harlequin RIP software is a computer software program developed at private expense and is subject to the following Restricted Rights Legend Use duplication or disclosure by the United States Government is subject to restrictions as set forth in i FAR 52 227 14 Alt III or ii FAR 52 227 19 as appli cable Use by agencies of the Department of Defense DOD is subject to Global Graphics Software s customary commercial license as contained in the accompanying license agreement in accordance with DFAR 227 7202 1 a For purposes of the FAR the Software shall be deem
8. are printed with perfect alignment A process through which a page defined in the Post Script language is turned into a bitmap using a Raster Image Processor or RIP as it is commonly called A type of trap where the ink boundary is expanded to prevent light leaks in the print Areas of a page that are marked as needing trapping Traps are used to hide misregistration errors The two main trap techniques used are spreading where the ink boundary is expanded and choking where the ink boundary is contracted A collection of trapping parameters in TrapPro The trapset allows you to apply different trapping requirements quickly and easily in the Harlequin RIP An area of the page where the background white paper is revealed as a result of misregistration TrapPro User Manual December 2010 27 4 Glossary 28 TrapPro User Manual December 2010 Index B Black trap widths control 18 C Creating ink sets 23 E Enabling TrapPro 11 14 F Feathered traps 6 H Harlequin RIP TrapPro Manager 15 Highlight traps control 19 I Ink sets creating and editing 23 Ink types normal ink 22 opaque ignore ink 22 opaque ink 22 transparent ink 22 N Name trapping preferences control 17 Normal ink type 22 O Object to image trap placement control 19 Opaque ignore ink type 22 TrapPro User Manual December 2010 Opaque ink type 22 P Proportional traps 7 R Relative color step limit control 18 S Slidi
9. cal brush mai a A misregistration area b Normal trapping c Anamorphic trapping which is different in the applied with a circular applied with an elliptical vertical and horizontal axis brush brush Figure 1 1 Anamorphic trapping 4 TrapPro User Manual December 2010 1 3 Trap types 1 3 2 Mitred end traps Mitred end traps are used to tidy up the ends of traps as illustrated in Figure 1 2 Mitred ends are created automatically with no user settings to configure Mitred ends Figure 1 2 Mitred traps TrapPro User Manual December 2010 1 Introduction 1 3 3 Feathered traps Feathered traps are used to create a smooth color transition at the trap object boundary This softens the line between the trap and the object with the intent of making the trap less noticeable TrapPro allows you to specify the number of steps to use for feathering with the Feather steps option as described on page 17 Unfeathered brush Feathered brush a Unfeathered trap b Feathered trap Figure 1 3 Image showing feathered and unfeathered traps 1 3 4 Sliding traps An ink s neutral density value is used to determine whether an ink should be spread or choked In some cases where the neutral density changes across an object the spread choke threshold may be crossed This results in a sudden change in trap direction and a noticeable step in the trap A sliding trap pre vents the abrupt shift in direction by allowing the trap to
10. e g Aldus Apple Startup prep Disk space left for system 150 Mb Minimum memory left for system 40930 Kb Per renderer memory 10 0 Mb Minimum compression ratio 66 70 Memory for RIP 311296 Kb Memory reserve for RIP Allow stop start Disable sounds Figure 2 4 Memory settings for TrapPro 5 Click OK to close the Options dialog and OK to close the Configure RIP dialog 6 You must now restart the RIP to use the new memory settings If you find the RIP is unstable when processing jobs allocate additional memory to the RIP increasing in blocks of 128 MB at a time until the RIP is stable Remember to restart the RIP each time you change the memory settings 14 TrapPro User Manual December 2010 3 Working with TrapPro TrapPro contains a number of configuration options which enable you to manage your trapping options precisely 3 1 The TrapPro Manager TrapPro uses the TrapPro Manager to maintain all your trapping options in one easily accessible place To access the TrapPro Manager select TrapPro Manager from the RIP s Output menu TrapPro Manager Trap width 0 0030 inches 0 1000 inches 0 0150 inches 0 0030 inches Delete Cancel Figure 3 1 TrapPro Manager The TrapPro Manager allows you to add and edit trapsets Trapsets describe your job trapping preferences such as trap width trap color image placeme
11. ed Figure 1 6 Small element protection 8 TrapPro User Manual December 2010 1 4 Trapping zones 1 4 Trapping zones Areas of a page that are marked out for trapping are called trapping zones Each trapping zone can have its own set of trapping rules that are indepen dent of any other zones which may exist on the page There are several ways by which trapping zones can be created e through TrapPro this sets up a default zone covering the whole page e through applications that generate trapping parameters or e through settrap parameters in the PostScript language Where trapping zones overlap the zone defined most recently takes prece dent in the overlapping area Some image creation and page assembly appli cations can produce PostScript LanguageLevel 3 jobs that define multiple trapping zones on a single page and define different trapping parameters for each zone In general if a job defines several trapping zones for a page Trap Pro can process the job more easily This is especially true for very complex pages or jobs which impose several pages on one sheet If the job defines no trapping zones the RIP assumes a trapping zone that is the size of the page and calls it Zone 0 The RIP names any trapping zones generated by the job as Zone 1 Zone 2 and so on 1 4 1 PDF jobs and PJTF PDF jobs containing PJTF Portable Job Ticket Format structures that detail trapping parameters are supported in TrapPro So if TrapPro is en
12. ed to be unpublished and licensed with disclosure prohibitions rights reserved under the copyright laws of the United States Global Graphics Software Incorporated 31 Nagog Park Suite 315 Acton MA 01720 United States of America Contents 1 Introduction 1 Features 1 Requirements 3 Trap types 3 Trapping zones 9 2 Enabling TrapPro 11 Enabling TrapPro 11 Reserving memory for trapping 12 3 Working with TrapPro 15 The TrapPro Manager 15 Trapset preferences 16 Using trapsets 20 Monitoring TrapPro in the Harlequin RIP 21 TrapPro and ink types 22 4 Glossary 25 Index 29 TrapPro User Manual December 2010 iv TrapPro User Manual December 2010 1 Introduction TrapPro is an object based in rip trapping solution for the Harlequin RIP that delivers outstanding performance with excellent memory utilization Its powerful trapping engine is augmented by highly configurable trapping options which allow you to fine tune your trapping needs and accommodate a diverse range of job types and customer requirements 1 1 Features An extensive range of advanced trapping features are included in TrapPro including Sliding traps to avoid abrupt shifts when creating transitions in trap ping gradients vignettes Mitred ends and joins for traps that taper or narrow avoiding unsightly artifacts Narrowed proportional traps to preserve thin design elements Image mask support to trap masked imag
13. es correctly and avoid lines where misregistration occurs Feathered traps to create soft edges that produces hardly discernible trap lines TrapPro User Manual December 2010 1 Introduction Complex image and shfill support to trap all object types Object to image trap placement is also supported Supports special inks such as metallic opaque and varnish transpar ent inks with lay down order being automatically determined Shaded fill radial and axial support Full n color support for CMYK and spot colors with no limit to the number of colors TrapPro is able to handle Protection for small text and graphic elements so they are not over whelmed by traps Support for anamorphic trapping Intelligent trap brush that compares object and trap requirements and adjusts the traps so it is proportional to the original object This prevents artifacts such as mushroom artifacts on traps Auto chokes superblacks by default ensuring that superblack objects maintain a sharp crisp edge A separate trap width is definable for black Trap color density reduction This produces less visible traps between adjacent colors A faster more intelligent trapping engine that delivers improved per formance over previous trapping solutions Support for trap zones generated by PostScript Language Level 3 com patible applications A preview tool that uses the Harlequin RIP ROAM and highlight traps features to
14. gn correctly The result is either gaps or overlays Trapping attempts to fix the effects of misregistration by spreading or choking the inks to make errors less noticeable Neutral density is a measurement of the ink s ability to stop light in other words its opacity Neutral den sity is used by TrapPro to decide which ink should be spread or choked For a more detailed description of neutral density see Adobe s PostScript Language Reference Third Edition page 458 A type of trapping program that operates on the page description language objects which describe how the page is laid out TrapPro is one such example pro gram Overlays occur in misregistration when separations misalign and overlap The process of laying colors on top of each other to create the color image The way colors mix needs to be accounted for when overprinting is used It is the opposite printing method to knockout printing This occurs when the area of memory allocated to the RIP has been used up and the overflow is written to disk Page buffering is not allowed in TrapPro you must allocate sufficient memory to avoid it TrapPro User Manual December 2010 raster trapping program register rendering spreads trapping zones traps trapsets light leak A type of trapping program which operates on the pixels that make up the rasterized page Raster based trappers are slower than object based trappers Separations register when they
15. llowing methods Automatic The trapping engine autonomously determines the most suitable trap to object placement based on the colors of the objects under consideration Spread image Traps are generated by spreading the image area into the object Choke image Traps are generated by spreading the object into the image area Center Half spread choke where the trap is centered around the original boundary of the two objects None Objects remain untrapped against images text Highlight traps Default value Not enabled Select the check box to enable highlighted traps and have them output to the Other colors in job separation where they can be inspected in Roam Ensure this separation is generated in the Edit Style for Separa tion window by setting the option to print it You may use red or green highlights to show where the traps are being generated To view highlighted traps in composite outputs TrapPro overprints highlight traps into the colors represented in the page buffer Reprocess the job with highlight traps off when printing the final output in composites TrapPro User Manual December 2010 19 3 Working with TrapPro 20 3 3 Using trapsets Trapsets are invoked in your Harlequin RIP page setups by choosing TrapPro as the trapping method and the appropriate trapset from the Preferences drop down list Trapping options Figure 3 3 Trapping options in the Edit Page Setup dialog Edit Page Setup Default P
16. ng traps 6 Sliding traps color limit control 18 Small element protection traps 8 Small object protection factor 18 T Transparent ink type 22 Trap Color density reduction control 18 19 Trap height control 17 Trap width control 17 Trapping controls black trap widths 18 highlight traps 19 name trapping preferences 17 object to image trap placement 19 relative color step limit 18 sliding traps color limit 18 small object protection factor 18 Trap Color density reduction 19 trap Color density reduction 18 Trap height 17 Trap width 17 units 17 Trapping zones 9 TrapPro Manager 15 29 30 Traps feathered traps 6 proportional 7 sliding traps 6 small element protection 8 U Units control 17 Z Zones PDF jobs and PJTF 9 trapping zones 9 TrapPro User Manual December 2010
17. ning Plugin 1 bit HEDS1 Harlequin Error Diffusion Screening Plugin 2 bit HEDS2 Harlequin Full Color System HFCS Harlequin ICC Profile Processor HIPP Harle quin Standard Color System HSCS Harlequin Chain Screening HCS Harlequin Display List Technology HDLT Harlequin Dispersed Screening HDS Harlequin Micro Screening HMS Harlequin Precision Screening HPS HQcrypt Harlequin Screening Library HSL ProofReady Scalable Open Architecture SOAR SetGold SetGoldPro TrapMaster Trap Works TrapPro TrapProLite Harlequin RIP Eclipse Release and Harlequin RIP Genesis Release are all trademarks of Global Graphics Software Ltd Protected by U S Patents 5 579 457 5 808 622 5 784 049 5 862 253 6 343 145 6 330 072 6 483 524 6 380 951 6 755 498 6 624 908 6 809 839 Other U S Patents Pending Protected by European Patents 0 803 160 0 772 934 0 896 771 672 29 760 8 08 Portions licensed under U S Patent No 5 212 546 4 941 038 TrueType is a registered trademark of Apple Computer Inc The ECI and FOGRA ICC color profiles supplied with this Harlequin RIP are distributed with the kind permission of the ECI European Color Initiative and FOGRA respectively and of Heidelberger Druckmaschinen AG HEIDELBERG The IFRA ICC profiles supplied with this Global Graphics Software are distributed with the kind permission of IFRA and of GretagMacbeth International Cooperation for Integration of Processes in Prepress Press
18. nt and highlight traps information Trapsets appear in the TrapPro Manager TrapPro User Manual December 2010 15 3 Working with TrapPro under a name chosen by you to reflect its purpose or the type of traps it cre ates For example Wide traps Highlighted traps Customer ABC and so forth The trapset names appear in the Edit Page Setup dialog ready for selection as described in Using trapsets on page 20 3 2 Trapset preferences To specify your trapset preferences create a new trapset or edit an existing trapset from the list in the TrapPro Manager dialog The trapset options are contained in the Edit TrapPro Preferences dialog Figure 3 2 and are described below Edit TrapPro Preferences Name trapping preferences MEMES Ink Set Default CMYK Ink Set v En Trap Widths units inches gt Trap width 0 0030 Trap height 0 0030 Feather steps pooo Black trap width jo Small object protection factor jos Color Details Relative color step limit Sliding traps color limit Trap color density reduction Images Dbject to image trap placement Roam Preview J Highlight traps Figure 3 2 The Edit TrapPro Preferences window 16 TrapPro User Manual December 2010 3 2 Trapset preferences Name trapping preferences This option allows you to specify a name for this trapset The trapset name is subsequently made available for selection in the Harlequin RIP page setup when cho
19. nual December 2010 4 Glossary chokes A type of trap where the ink boundary is reduced to prevent overlaps feathered traps Traps that are drawn in a series of steps that fade gradually at the fringe making them less noticeable four color process A method of print reproduction which uses four colors cyan magenta yellow and black to produce a full color image Each color is laid down individu ally in a separation gap A gap occurs as a result of misregistration Two colors which should abut each other fail to align cor rectly The result is an area of unprinted page between the two colors where none should exist ink set Holds information on each ink type used in a print job Determines which inks should be trapped and which should be ignored In RIP trapping A method of implementing trapping within the RIP as a job is processed TrapPro User Manual December 2010 25 4 Glossary 26 knockout knockout printing misregistration neutral density object based trapping program overlay overprint printing page buffering The transparent hole in a separation where a second overlapping color knocks out the first color The second color is printed into the hole to complete the image The process of printing separations where one color knocks out another color Avoids mixing colors caused when inks are placed on top of each other A printing error produced when two colors fail to ali
20. ormal inks When deciding which ink to spread the lighter of the two inks according to their neutral density values is chosen See Setting ink density values for details on setting the neutral density value of an ink TrapPro User Manual December 2010 3 5 TrapPro and ink types 3 5 1 Setting ink density values As mentioned above TrapPro uses the neutral density value of an ink when determining which ink should be spread to create a trap Using the Ink Set Manager Figure 3 4 you can change the density values associated with your inks and in doing so determine how traps will be applied to your jobs Ink Set Manager Edit New Copy Delete Cancel Figure 3 4 Ink Set Manager The Default CMYK Ink Set supplied in the RIP contains standard settings for cyan magenta yellow and black inks as shown in the Edit Ink Sets dialog Figure 3 5 Edit Ink Sets Name Ink Set Default CMYK Ink Set Name Ink Set Select row to edit and add or delete inks from sets Edit selected row Figure 3 5 Edit Ink Sets window TrapPro User Manual December 2010 23 3 Working with TrapPro When adding a new ink set or amending an existing one ensure that all inks used in a job that have a specific trapping requirement such as opaque trans parent or ignore are included in your ink set Otherwise any inks not included will be trapped as normal ink with 1 0 density 24 TrapPro User Ma
21. osing trapping preferences You cannot change the name of a trapset that is associated with a page setup and in this case the name field will not be available for selection Ink set In TrapPro the ink set describes how each ink will be trapped that is whether an ink is to be trapped normally ignored treated as an opaque or as a transparent You can create ink sets using the Ink Set Manager as described in Section 3 5 on page 22 units This options allows you to select your preferred measurement unit Trap width Default value 0 0762mm Allows you to specify the width of the normal traps generated by Trap Pro Normal traps consist of all traps except those created against black or narrow objects such as small text or thin lines The value you enter here relates to the amount of possible horizontal misalignment occurring in the output device Trap height Default value 0 0762mm Allows you to specify the height of normal traps generated by TrapPro The value you enter here relates to the amount of possible vertical mis alignment occurring in the output device TrapPro creates anamorphic traps when different values are entered for trap width and trap height For more information on anamorphic traps see Section 1 3 1 on page 3 Feather steps Default value 1 This option allows you to specify the number of color gradiation steps to use in a trap The default value of 1 means traps are created with a con stant color Any greate
22. r value than 1 turns the edge of the trap into a gra diation It should be noted that feathering is achieved at the expense of considerable extra computation so increase this value with caution See Section 1 3 3 on page 6 for more information on feathered traps TrapPro User Manual December 2010 17 3 Working with TrapPro 18 Black trap widths Default value 100 0 Allows you to specify the width of traps when trapping against black objects The value that you enter is a percentage of the normal trap width for example 200 0 creates black traps that are twice the width of normal traps Small object protection factor Default value 0 6 This option allows you to protect small objects on the page by reducing the trap width when trapping against them The protection factor that you enter ensures the trap width is never greater than a ratio of the aver age width of the object to the normal trap width For example a value of 0 6 ensures the trap is never greater than 60 of the object it is trapping against Relative color step limit Default value 10 0 Allows you to determine where traps are generated by comparing the relative color change between two objects If a small value is specified for example 2 0 the color change need only be small before a trap is considered necessary which may cause too many traps to be generated Conversely if a large value is used for example 30 0 the color change has to be large before a t
23. rap is considered necessary which may cause too few traps to generated Sliding traps color limit Default value 90 0 Allows you to specify a threshold value to determine when a trap should begin to straddle the boundary between two colors Sliding traps are used to prevent a sudden and noticeable step in the trap where the trap crosses the spread choke threshold When the limit is set to 0 0 the trap always slides when set to 100 0 the trap never slides See Section 1 3 4 on page 6 for more information on sliding traps Trap color density reduction Default value 0 0 This option allows you to specify a value that scales the trap color towards the neutral density of the darker of the two colors involved in the trap When the value is set to 100 0 the trap is as light as it will go This setting applies to all traps except where objects use black or opaque colors TrapPro User Manual December 2010 3 2 Trapset preferences Trap color density reduction is ignored when Feather steps is set to any value greater than 1 Object to image trap placement Default value Center Allows you to specify how objects on the page should trap against non image objects Image to object trapping applies in cases where an image is trapped to a non image object Text is only affected where it is the object to which an image traps In addition if one image traps to another image centerline traps are applied From the list choose from the fo
24. ro in the Harlequin RIP TrapPro outputs trapping dialog to the RIP monitor The information can be used to verify that trapping has been achieved successfully and to check the time taken to execute the trapping process In the example output shown below the trapping procedure took 9 seconds to complete examined 79 page objects and generated 36 traps TrapPro User Manual December 2010 21 3 Working with TrapPro Setup loaded Highlight traps Starting Job On 11 September 2002 16 19 03 Using Color Setup No Color Management Using default device calibration Interpretation time 9 seconds Trapping 79 objects on the page Generated 36 traps in 0 00 06 3 5 TrapPro and ink types TrapPro uses ink types when determining which inks to trap and which to ignore Four ink types are recognized by TrapPro Normal Opaque Opaque ignore Transparent 22 Most inks are of this type and traps will be created to prevent light leaks or overlays by TrapPro using a vari ety of trap types Opaque inks such as metallic are not allowed to spread However when an opaque ink meets another opaque ink and a trap is required the lighter ink according to their neutral density values is chosen to spread See Setting ink density values for details on setting the neutral density value of an ink This type of ink is not trapped Transparent inks such as varnish are only trapped to other transparent inks and never to n
25. see where traps will be placed Support for PostScript language 1 2 3 and PDF 1 2 1 3 1 4 TrapPro User Manual December 2010 1 2 Requirements 1 2 Requirements TrapPro requires Harlequin RIP Eclipse Release or later and is available for all platforms supported by the RIP Besides the resources required to run the RIP see the relevant Harlequin RIP installation guide for resource require ments an additional 256 MB should be allocated to the RIP for TrapPro as described in Reserving memory for trapping on page 12 1 3 Trap types The advanced trapping engine in TrapPro is capable of creating pixel accu rate traps using a variety of trap types for an almost imperceptible trapping solution The various traps used by TrapPro are described in this section You may find this information useful when setting up your TrapPro trapping options which are described in Trapset preferences on page 16 1 3 1 Anamorphic traps Anamorphic traps are used by TrapPro when the possible amount of misalign ment is different across the vertical and horizontal axis of the press Using anamorphic traps helps to minimize the amount of trap required to compen sate for this type of misregistration TrapPro User Manual December 2010 3 1 Introduction Anamorphic traps are created when different values are set for the trap width and trap height in the Edit TrapPro Preferences dialog Misregistration area Circular brush Ellipti
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