New curves (warm and cool tones only) for Ultrachrome (K2) inks for Epson 4000 for three barayta papers: HahFAB Hahnemuhle Fine Art Barayta HarFBA Harman Fiber-Based Alumina IlGGFS Ilford Galerie Gold Fiber Silk have been added to: Files > Curves > Epson 4000 > MiloUC.zip along with spreadsheets documenting their development. A puzzler occurred during development of the warm curves. After calculating Default Ink Limit (060 for all three papers), I experimented with lowering the Light Black Limit from 060 to 020 in decrements of five (nine curves for each paper). White and black points remained constant within each set of nine curves, but the curves "sagged" more and more as Black Limit was lowered. In the end, I only linearized for Black Limits 060 and 020. Across all three papers, both linearizations are essentially identical both visually and numerically. Why would this be the case? For what it's worth, the distributed curves use Black Limit 060.
Message
New 4000/UC barayta curves - and a puzzler
2008-05-25 by milogiacomorambaldi47