Re: First Gum Print

From: Dave Rose (cactuscowboy@attbi.com)
Date: 03/08/03-06:47:26 PM Z

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"4ml gum with 2 grams lamp black powder" WOW! No wonder your print is
totally black!

I'm using 1 gram lamp black powder per 100ml gum. At that ratio, It's
strong enough for acceptable 1 coat prints. IMO, you're using way too much
pigment in the mix, leading to massive staining that obliterates any image.

Dave in Wyoming

From: "Ed Buffaloe" <EdBuffaloe@UnblinkingEye.Com

> Pre-shrunk & sized Fabriano Uno. Precoat with unpigmented gum--expose for
30 minutes under UV. Soak and clear chromium stain with sulphuric acid.
Coat with 4ml gum with 2 grams lamp black powder plus 4ml saturated solution
ammonium dichromate. Expose through 8x10 negative under UV light for 25
minutes. The negative is an 8x10 developed in a conventional developer to a
d-max of 1.26.

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