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... -----Original Message----- From: Jacek [mailto:gonsaj@iinet.net.au] Sent: Friday, April 27, 2007 11:00 AM To: alt-photo-process-l@usask.ca Subject: Re: Unknown area in Gum printing? Hi, 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. Jacek
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