RE: pt/pd mounting
AFAIK, polyurethane wood finish (like Hydrocote) is impermeable to air and water. If one coats both the front and the back of the print with polyurethane that should protect the print very successfully (at least in theory). I remember Ryuji had offered me his time by doing a peroxide fading(?) test if I send him a couple of samples (polyurethane coated Vandyke). Well if he's still interested I'm willing to send him few samples (one coated on the front only, the other both sides and an uncoated control strip)... Regards, Loris. -----Original Message----- From: EJN Photo [mailto:ejnphoto@sbcglobal.net] Sent: 11 Eylül 2006 Pazartesi 23:00 To: alt-photo-process-l@usask.ca Subject: RE: pt/pd mounting ... The process is subjected to a variety of pH environments and different practitioners will use different clearing bath and what not affecting the pH of the paper. I doubt any one has studied the new sprays meant for ink jet prints on the longevity of PT/PD prints. If the air is what carries the sulfur, than eliminating contact with the air seems like a place to start. Or will the sulfur migrate through the protective surface? ...
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