From: Jack Brubaker (jack@jackbrubaker.com)
Date: 04/08/03-11:09:43 AM Z
Chris,
I use the diluted dichromate (half part saturated sol. AD, half part water)
mixed equal with gum to print high contrast layers to build contrast in dark
areas of image. With an exposure close to the exposure you would use for the
standard gum-sensitiser mix the reduced sensitivity and higher contrast will
produce a crisp "lith" like image of the darkest tones. It is fragile (less
hardened) so can be selectively brushed to only leave the effect in the
desired areas. The soft gum developes quickly and never leaves a pigment
stain. I think that is because I only use this method after building several
other layers so the hardened gum of previous layers has built up on most of
the paper. But perhaps the high contrast emultion is so soft in the clear
areas that it simply washs off easily.
Jack
> From: "Christina Z. Anderson" <zphoto@montana.net>
> Reply-To: alt-photo-process-l@skyway.usask.ca
> Date: Sun, 06 Apr 2003 22:26:13 -0600
> To: alt-photo-process-l@skyway.usask.ca
> Subject: Re: Successful Gum Print
>
> Ed Buffaloe said>
>> I'm wondering if it would help to reduce the amount of dichromate solution
>> in the mix? I started with 50/50 gum-pigment and dichromate, then went to
>> 60/40. Maybe I should try 70/30 to reduce stain further?
>>
> I'd love to know what others do. I have never actually used less than
> 1:1 gum pigment to am di, altho I have read to use as much as 1 gum/pigment:
> 1 gum: 1 dichromate for shadows. I have used more am di, not less. I assume
> your contrast would increase with less dichromate.
> Today I coated a BW print with gum and exposed. I tried it on both
> glossy (don't) and matte (yes) and it works. Interesting effect.
> Chris
>
>
>
This archive was generated by hypermail 2.1.5 : 05/01/03-11:59:54 AM Z CST