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Oh, you’re completely correct. It’s a curve that you’d use to linearize your densities. Effectively the inverse curve. E

If you can take a higher loss of density, PK ink has much better performance on?abrasion resistance. Or you can mix Epson PK and Piezography UHD MK in a ratio been tested on your paper, to recovery

OK this makes sense to me. However, where do I get expected densities? When I look at the output (GRAY_CURVE) from "BWMASTERY-21-step-QTR-Correction-Curve-Tool-for-Digital-Negatives", it looks like

Epson MK will work just fine. Slight loss of dmax but no need to recalibrate best, Walker

GRAY_CURVE has pairs of numbers - in each pair, the first number is the expected density, and the second number is the actual (measured) density. The expected densities go from 0 to 100. Measured

I managed to create a warm curve for Canson Arches 88 paper on my P-800. The process worked out better than I expected. The 21-step target printed almost perfectly linear (using LINEARIZE with

Hi Paul, I have been interested in your recipes/approach. Particularly in regards to this 'touch stability' issue (please correct me if there's a better term to use), so I'm glad you chipped in. How

Interesting comment. I have usually used STS (source of old MIS) inks. I bought a sample of Piezo Mk and noticed the dmax was better. However, more carbon in the solution appears to come with some

Hi, New to the forum. I would normally post this over on the Piezography forum but it's down at the moment and I imagine plenty of you over here will have experience of piezography. Plus I'd thought

Why would I rely on Epson to answer a question regarding QTR?

You should direct your question to Epson.

Will the latest Epson 17" P5370 be supported or can be treated as a P900? Reading Epson marketing material and other sources the P5370 has the same ink channels and printhead.

Thanks for this Richard. I have also read most of the documentation you have available, and watched your videos, and can appreciate the important advances that your apps provide at the very least to

All of these questions are why I initially started writing my huge "How to QTR" book back in 2014. I realized all the ways where the ink descriptor file and curve creation steps could be improved and

Thanks again Eben, this is very helpful indeed. I'll keep plodding along....

Here’s how I (used to) use it when I was hand-writing profiles. This is based on old, perhaps incorrect, knowledge, so if I’ve got it wrong (a) forgive me, and (b) feel free to set me

Thanks Clay!? I'll have a look....

If you are determined to use the ink descriptor file approach, I strongly recommend you download the pdf here: https://chainick.github.io/qidf-spec/? Quad Ink Descriptor File Format

Thanks for your reply Eben. Regarding bwmastery, I have read his documentation too. Not sure I want to spend more money, as QTR should be be able to get me where I want to be (maybe not if I don't get

By far the easiest route to doing this is the software by Richard Boutwell at bwmastery.com. He also has a good guide to the descriptor file. The K limit is the important one; it determines the