[alt-photo] Re: no shrink, no size tricolor gums

[Jack Brubaker]

Yes, see the prints of Sam Wang.  Jack



On Sun, Sep 12, 2010 at 4:08 PM, Charles Ryberg <cryberg at comcast.net> wrote:

> I'm trying to make tricolor gums on FAB using the no shrink, no size method
> mentioned here recently.  I have made three curves which appear to give good
> results as far as color and tone go, but they require at least an hour wash
> per coat.  I'm having registration problems which I think might be caused by
> the excessive soaking--so, I want to try new color mixes (and, of course,
> calculate new curves) which will clear more quickly.  My current mixes are
> made from (pigment/gum/water stock), gum, saturated potassium dichromate all
> three in equal volumes.       I expose for between 4 and 6 minutes
> (depending on color) under BL tubes.
>
> My guess would be to expose less and accept some loss of DMAX.  Could I
> make up for this by increasing the pigment load?
>
> Any other suggestions.  Please remember the goal is not to size.
>
> Thanks    Charles   Portland Oregon
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