Jaws
gDoc
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.
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. Global Graphics’ trapping engine can be configured to use the correct trap type and size to suit the target printing process.
Harlequin TrapPro™ - Global Graphics’ trapping engine
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 vector objects that describe the page – objects described in PostScript®, PDF and other PDLs. Object based trapping improves the quality and accuracy of the trap shape.
Harlequin TrapPro is an object-based trapping engine that uses the Device-Oriented Display List that is generated in the Harlequin RIP. 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.
The trapping engine can be configured to use the correct trap type (see below) and size to suit the target printing process. TrapPro will also act on trap zones and trapping parameters set in applications such as InDesign and supplied in PDF or PostScript jobs.
Sliding traps
When adjacent colors have similar neutral densities, TrapPro automatically slides the trap position from spreading the lighter color into the darker color.
Anamorphic traps
Anamorphic trapping is a method of compensating for different degrees of misregistration in the x and y directions in the printing process.
Trapping compensates for misregistration in the printing process, but the physical factors influencing this will very often be different in the two axes, x and y. 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.
Trap end style
A trap end style is a parameter that defines how the intersection of traps are formed. TrapPro supports mitered trap ends for trap intersections.
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.
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.
