U of S | Mailing List Archive | alt-photo-process-l | Re: humidity and gum coating

Re: humidity and gum coating


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


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