Dear all,
I bought my first Epson printer a few weeks ago and have just started getting into QTR. Frankly speaking, this group and QTR were the decisive factors to plunge into this adventure vs. going (on) for the commercial suppliers route (with almost no control over anything). Thank you very much!
My equipment:
Epson P800 (genuine Epson ink)
Epson Archiveal Matte paper (for the sake of cheap trials)
Vipdens C5 densitometer
I try to create a linear black-only curve (following Lou Dina’s tutorial) as a first exercise - getting used to the parameters, formatting, etc. Unfortunately, my trials already come to halt at the very first step: Determination of ink limit.
I measure the following density values (K):
0% 0
5% 0.45
10% 0.83
15% 1.16
20% 1.38
25% 1.58
30% 1.77
35% 1.95
40% 2.06
45% 2.17
50% 2.26
55% 2.35
60% 2.41
65% 2.47
70% 2.50
75% 2.54
80% 2.58
85% 2.59
90% 2.60
95% 2.63
100% 2.61
(1) I didn’t expect a Dmax much higher than 2.2 and am wondering if my densitometer has a problem (or if I am misinterpreting the indicated values). The densitometer was serviced last year and yield perfect values when measuring the references (which are brand new). What's your opinion?
(2) Where would you set the ink limit and black boost?
I’d highly appreciate your support. I was trying to solve this on my own by reading through many discussions and all tutorials that I could find - all in vain.
All the best, from Europe,
Glenn
P.S. Density of LK: 1.51 and LLK: 0.85 at 100%.
Message
Re: [QuadtoneRIP] P800 ink limit
2016-03-18 by Paul Roark
If you are printing on "Archival" Matte and getting those density numbers, I'd say your densitometer is giving false readings. They are considerably too high for a matte paper. If people really are getting those densities on matte paper with the new Epson, I might have to buy some of that ink.
Assuming the relative numbers are correct, an ink limit of 75 and the black boost set to 95 might be what I'd do. The boost puts a little steeper slope on the final segment of the black curve. Also, a lower ink limit makes the black ramp printed at the ink limit (the second Calibration Mode print) a slight bit easier to read.
Paul
On Thu, Mar 17, 2016 at 4:32 PM, gheim5@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote: