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TrapPro in-RIP Trapping Option for the RTI RIP or Workflow

As each color is printed, the possibility of misregistration occurs as the colors fail to line up correctly due to paper shift, paper stretching, an incorrectly aligned press, or other mechanical inaccuracies. To compensate for misregistration, traps can be added to the areas where gaps or overlays are most likely. The automatic, object-based in-RIP trapping solution, TrapPro, increases job quality and productivity by having your jobs automatically trapped by the Harlequin RIP or Prepress Workflow.

TrapPro is an automatic, object-based in-RIP trapping solution available as an option for the RTI Harlequin RIP or Prepress Workflow. TrapPro is integrated into the RIP for enhanced workflow efficiency and maximum job throughput. TrapPro offers: enhanced / extended support for metallics and varnishes, Shfill support (both axial and radial fills), full N-color support, smaller memory requirements and faster processing times. This new trapping engine based on Device-Oriented Display List enables the software to trap everything the RIP renders. TrapPro offers adherence to Adobe®’s in-RIP trapping standards and PostScript® Language Level 3 (LL3) trapping parameters.

Improved Job Quality
Eliminate gaps and inaccuracies in jobs by automatically trapping each job.

Highlight Trap Feature
Check one box within the TrapPro setup and the RIP will automatically highlight traps for easier viewing. This feature allows you to preview any of the traps generated by the RIP before outputting the job. Find trapping erros before committing the file to film or plates.

Increased Productivity
TrapPro eliminates the network traffic and application expertise required by standalone-workstation trapping solutions. It saves system time and man hours, increasing throughput and productivity. Since it requires no additional computer, hardware or training, TrapPro also reduces costs.

Automated Trapping
TrapPro has been designed to meet the changing requirements of today's busy production schedules. It can be set to trap jobs automatically without manual intervention and can be easily automated to accommodate different types of jobs or customers.

Small Object Protection
This feature stops traps from obscuring the objects which they are trapping and corrupting the look of the objects. It protects all object types including text.
Sliding Traps
When adjacent colors have similar neutral densities,TrapPro automatically slides the trap position from spreading the lighter color into the darker color. This technology allows you to avoid abrupt shifts creating smooth transitions when trapping gradients/vignettes.
Anamorphic Traps
Anamorphic trapping is a method of compensating for different degrees of misregistration in the vertical and horizontal directions. Trapping compensates for misregistration in the printing process, but the physical factors influencing this will very often be different on the vertical or horizontal axes. TrapPro compensates for different amounts of possible misregistration in both axes.
Narrowed Traps
There are cases where the full width of the trap does not fit into the available spread area. In this case, TrapPro automatically modulates the size of the trap to cover a proportion of the available area. The user can adjust the default value (50%), shown in the example below.
Mitered Traps
A trap end style is a parameter that defines how the intersection of traps are formed. TrapPro supports mitered trap ends for trap intersections which allow traps that taper or narrow to avoid unsightly artifacts. Mitred ends are created automatically by TrapPro, with no user settings to configure.
Feathered Traps
Instead of having a constant color across its width a feathered trap fades gradually from the full trap color to the background color. The protection against misregistration tails off gradually rather than disappearing abruptly. The visual impact of a feathered trap is generally much less than a constant-color trap of the same size.

Benfits of in-RIP Trapping

Traditionally, a skilled press operator allowed for misregistration by spreading or choking the ink in an attempt to make the gaps or overlays less noticeable. Also, the page designers played their part by attempting to ‘design out’ any potential misregistration from the page design. Both methods require great skill and time to perfect. The Harlequin RIP's trapping technology handles trapping automatically, as the page is processed by the RIP. A good trapping solution must be flexible enough to support various digital workflows while providing impeccable quality, proofing and previewing. In-RIP trapping accommodates the need for last minute changes of printing conditions without requiring time-consuming human intervention, and it allows users to be able to apply the same page content for multiple purposes. These increase the throughput in prepress systems, resulting in greater profitability.

In-RIP trapping is by far the easiest trapping method to implement since, once the trapping parameters have been entered, trapping occurs automatically without the need for further intervention. Trapping programs fall into the two basic categories: raster trappers and object trappers. Raster trappers analyze for traps on a pixel-by-pixel basis, where each pixel in the rasterized page is considered for trapping. Object trappers work on the PostScript® language objects or vector objects that describe the page. This means they have considerably fewer calculations to make than raster trappers when deciding where to place traps, and are therefore considerably faster than raster trappers. Furthermore, object based trapping improves the quality and accuracy of the trap shape. TrapPro is an object-based trapping engine that uses the Device-Oriented Display List that is generated in the RTI RIP-Kit. This allows the trapping engine to trap everything the RIP renders, with pixel accuracy, and with great speed. The traps are drawn with a brush and it maintains color fidelity and traps real device colors so trapping with extra grays is supported. TrapPro provides the following benefits:

An easy to use Graphical User Interface (GUI) allows the user to quickly configure the trapping parameters. A user can create, edit, copy and delete trapsets using the Trapping Manager. A trapset is a collection of trapping parameters that allows the user to easily manage diverse trapping requirements.

Once the user specifies the parameters for trapping, the traps are automatically applied before the file is output to the media.

Trapping Preview
After creating a trapset, a user can check that the traps are being generated as intended using the built-in Roam preview feature. The Roam (preview) sample below shows a trap test with the highlight feature turned on and set to highlight the traps in red.

In-RIP Trapping Monitor
You can use the RIP monitor window to verify that trapping is occurring in the job, and to see how many objects were trapped and how long the process took.

The trapping itself is as fast and probably much faster than a raster engine. Since it does not have to go via an intermediate raster just for the benefit of the trapping engine, the whole workflow is very efficient.

In generating the traps, TrapPro uses the extra information in the Harlequin Display List, which provides a significant advantage over using a pure raster. The traps are clipped to the objects from which they arose, eliminating problems such as mushrooming (normally associated with brush-based traps).

Handling of spot colors
Color separations are trapped according to their ink type that may be of the type Normal, Opaque, Opaque Ignore or Transparent. Normal ink type is trapped normally. Opaque ink type is not spread or trapped except to another opaque. Metallic is an example of opaque ink. Opaque Ignore ink type is never trapped. Transparent ink type is effectively an overprint so it is not choked or spread, except to another transparent. Varnish is an example of transparent ink. The ink type associated with each ink may be edited using the Ink Set Manager function. Spot colors can also be added to the list of colors and an ink type assigned, enabling the user to easily control how spot colors are trapped.

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