RE: Unknown area in Gum printing?
Don't buy that much; formalin polimerizes depending on storage vessel &
conditions (you'll see white floating flakes inside the bottle when that
happens). I buy in 1lt plastic packaging and refresh it every year; cost
is not an issue to me. ($2 per lt here in Istanbul, Turkey). BTW, don't
skip Christina's suggestion of sizing with gum+dichromate...
From: Jacek [mailto:email@example.com]
Sent: Friday, April 27, 2007 11:00 AM
Subject: Re: Unknown area in Gum printing?
Thanks for that. I have to readjust how I brush the coating. Change the
pigment concentration and get some hardening. The hardener, I just spent
a whole lot of time sourcing it and came up with only one company only
selling 5 litres of formaldehyde and nothing less, one of the reasons
I'm reluctant to get it. I cant even get it from overstate or overseas
with all the security regulations :| Though I havent looked for others
like Chrome alum or glyoxal, I think its best if I do. Cheers guys.