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Re: [QuadtoneRIP] UV transmisison characteristics of Epson K3 inks

2014-03-04 by <sanking@...>

Yes, MK has the highest UV blocking of any of the inks in a K3 set. If I had included it the measurement would have been about log 3.5 at 100%. The reason I did not include it is because for making digital negatives for alternative printing most people do not use it in their profiles because its density is out of line with the other three major UV blockers, Cyan, Yellow and Light Black. If you notice, at the useful level of about 25% PK, C and Y are about equal UV blockers, and if we use LK at about 45% - 50% we have four inks that block about the same. This is good for smoothness in a digital negative, at least that is what I have found.

In other words, the very high UV blocking is not usually considered a plus profiling for digital negatives with alternative printing since it is somewhat overkill for the job.

Sandy

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