Digital BW, The Print

Yes I write my own QTR curves. My point was that at step 100 QTR lays down more in than at 5. You were saying that glosop was used as a filler. So therefore you would need QTR to treat an ink slot inversely to normal so that at low densities more rather than less of that ink would be laid down.

Steve Kale

(Sent from my Sony Ericsson P900)

________________ Reply Header ________________
Subject:	Re: [Digital BW] Bronzing - A Crazy Idea
Author:	"koloshor" <wiz@...>
Date:		27th November 2004 7:20:54 pm



--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Steve Kale" <stevekale@b...> wrote:
> 
> Then here is an issue. QTR can only treat gloss as an ink, laying it down lightly in the highlights and heavily in the shadows. It cant do the inverse (in present form).

Sure, it can. Have a look at one of the .quad files, and you'll see. For an Epson 2200 file, there are seven curves in the file. Each one controls a particular "channel". Each has 256 values, ranging from pure white to pure black. Typically, all seven curves start at 0, some might stay at zero, and others increase or decrease.

I'm uploading a version of EEM_2200-warm.quad where I've added a dash (4.3%, to be exact) of yellow in the no-ink areas. This is not for serious use, just an experiment in "filling in" GLOP. It will print ourtageously ugly (yellow is yellow, after all) on glossy paper with PK (not MK) ink, but it will show you a reasonably "bronzing free" print. 4.3% isn't the proper value, I suspect ssomething closer to 8% would be better. But it's a taste.

> I suspect the lay down of gloss is a lot more complex. For example the R800 has the option to lay down gloss outside the image area suggesting that it likely does need to be laid down where there is no ink.

In QTR, that option is always turned on. QTR will lay down whatever the curves tell it is zero density in the entire paper area. So you're going to use a lot of GLOP.






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