Re: glutaraldehyde shelf life
On Fri, 9 Oct 2009, Keith Gerling wrote:
Keith, I have no experience with glut. But I've found that, if undiluted, glyoxal and formaldehyde keep more or less indefinitely (preferably at a cool room temp). And since glut as I recall goes into *kits,* I'd figure it would last at least as well. The working solution of glyoxal can die overnight, if it wants to. Tho I understand from Sara Van Keuren that she keeps a formaldehyde working solution going in class almost forever.Anybody know how long this stuff lasts? Just the mere act of reading Phritz's woes have caused my prints to stain horribly. No problems at all 2 weeks ago, so I doubt if it "turned", but my glut was purchased back when Chris started to preach of it's qualities. (thanks Chris!) and I've only used a smidgeon of it
Plus, another thought occurred to me, reading the different findings for gelatined paper, sized, unsized, hardened or not, etc. etc. etc.:
It was my finding in the long long ago when I tested such things, that different gelatins reacted differently... I forget the numbers, but the "heavier" ones were quite different from, for instance, Knox, which I've used ever since.
I'll add that I found VAT sizing far, far and away more effective and long lasting than brush sizing... which I suppose folks who don't have a vat use. Up front, brush coat is of course easier, but ultimately not. For multicoating it doesn't last nearly as well... tho once I've done a lot of coats, I do often add a brush coat for a "refresher."
More later... now I'm off to the Met, tra la, to hear Robert Frank, with a ticket that just fell into my hands from the sky.