Re: gum question
Thanks Loris... Very interesting... Can you give a general idea of how
long your exposures are? As I recall, in the old books, where potassium
dichromate was the norm, it was generally used at 5% (apparently why they
could keep coated paper for weeks before exposing).
Of coure, nowadays -- at least around here -- bigger & faster are better
(or is that just cars?). In any event, can you say what started you in
that direction? Also, maybe you said & I missed that, too -- is this for
On Fri, 29 May 2009, Loris Medici wrote:
Hi Judy, it's ammonium dichromate. (Was shortened as "AD" below...) Regards, Loris. 29 Mayıs 2009, Cuma, 3:30 am tarihinde, Judy Seigel yazmış:On Thu, 28 May 2009, Loris Medici wrote:I always had better results (due my particular working style and/or materials?) with weak sensitizers; I use only two dichromate strenghts 5% and 2%. (AD, 1+1 gum/pigment+dichromate.) I also have 10% on hands for unusual situations though.Which dichromate is that, Loris -- potassium or ammonium ?????? J.