Re: pigments for gum and PDN

From: Kees Brandenburg ^lt;[email protected]>
Date: 06/11/05-04:12:04 AM Z
Message-id: <>

Hello Chris
Did you make your curves from a one coat gumprint? As the tonal range
gets longer with more coats curves might be more accurate when measured
and calculated after more than one coat (i.e. with your usual/preferred
number of coats). Never tried it though.

At what point do the curves for the individual colors differ?


> Today I print a side by side gum my old way (one curve for all three
> layers, black ink only neg on Photo Warehouse film)and then with all
> three layers done with their own color and curves (PDN method,
> colorized negs with 3 separate curves and 3 separate printing times,
> no black ink, Pictorico film), to see if there is a benefit with gum
> this way or not. I have no clue. I am going to predict that gum is
> such a variable process that it does not matter, being able to take
> care of these variables through development and by eye, but I'd love
> to be proven wrong. I know with cyano, silver, palladium and
> solarplate the PDN system works like a charm. I also know that at the
> least I have learned lots more about how gum and color respond by
> doing it.
Received on Sat Jun 11 04:12:24 2005

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