Re: humidity and gum coating
Judy, I think you misunderstood my post. The "seems logical disease" you're referring to is not just an excericise in thought; my statement was based on my own experience. I've found that putting a hardener in the sizing seems to create a seal between the paper fibers and the emulsion. I've coated this sized paper wet, dry, and a few spots in between, and didn't notice a difference. In either case, this is a topic I really don't care a whole lot about, so I won't argue about it any more. Camden Hardy camden[at]hardyphotography[dot]net http://www.hardyphotography.net On Mon, September 4, 2006 2:18 pm, Judy Seigel wrote: > > On Sat, 2 Sep 2006, Camden Hardy wrote: > >> What kind of sizing did you use? I'm no gum expert, but I would think >> that paper sized with a hardener as opposed to gelatin alone wouldn't >> try >> to soak the pigment in. My experiences with gluteraldahide seemed to >> completely isolate the emulsion from the rest of the paper. Just a >> thought... > > Camden, it isn't clear whether this question was directed to Tom or > to me, but the question isn't entirely clear either.... I do know one > woman who doesn't harden her gelatin sizing, but it's fairly standard > procedure to do so. > > However, IME hardened or not wouldn't have mattered in this case. That is, > unhardened gelatin tends to stain slightly, but nothing like the stain I > got from coating wet. And I assume the gyloxal isolating effect is > comparable to the glut, tho I don't recall any direct comparisons on just > that point. > > However, a warning: You may be setting yourself up for the same trouble > as Paul Anderson: the "seems logical disease." Any variable can change > other variables in any medium, making such speculation uncertain at > best... but, at least in my experience (and that even of acknowledged > experts) there is NO telling in advance in gum, it can change every > variable, even the color of your underwear. > > Let me suggest, however, that you take a look at > www.alternativephotography.com, assuming you can access it. The entire > first issue of Post-Factory is there, with details of, among other things, > basic gum, including pre-soak and sizing of the paper. It's true, this was > written in 1998, and other materials & methods have arrived in the > interim, but from what I understand the Knox gelatin/glyoxal route remains > the most likely, and least fraught, however great some do find glut. In > fact, I recently heard about a very bad experience (both for the printer > and the print) with the glut as I never heard about glyoxal... so far. > > Judy >
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