HP Z3100 HP Designjet Z3100 Printer Series - Advanced Profiling Solution - Page 9

Colorimetric accuracy Color profiles can be evaluated numerically with regards to color accuracy, which is relevant e.g. for proofing applications. The figure below illustrates typical printand-measure color differences in delta-E (1 dE being the smallest perceivable difference in theory) for the 46 colors represented in the FOGRA5 color control strip processed through the same ISO coated input profile and different HP Designjet Z3100 Photo Printer output profiles generated with different profiling packages, on HP Premium Instant Dry Satin paper, in ICC Absolute Colorimetric mode. Accuracy Results with Fogra Target (46 Color Patches) DE76 8 7 6 5 4 3 2 1 0 EPS Substrate Mean Max Primary APS ProfileMaker V5 Profiling Solution Monaco Table: comparing typical print-and-measure color accuracy results for different profiling packages, using the FOGRA color control strip and the HP Designjet Z3100 printer on HP Premium Instant Dry Satin paper. Perceptual rendering For photographic applications, numerical color accuracy is less important than what the final print looks like to an observer. Unfortunately this is a rather difficult thing to measure quantitatively, because we have no access to directly measurable quantities inside observers' heads. The results can and do also depend on the type 5 http://www.fogra.org/ FOGRA is an international organization with the objective to promote print engineering and its future‐oriented technologies in the fields of research, development and application, and to enable the printing industry to utilize the results of this activity