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Re: bubbles in gelatin

>On Tue, 10 Oct 2000, Judy Seigel wrote:


>
>What do you "squeegee out" with?  On what paper?  It doesn't rough up the
>surface? My squeegeeing has not (yet) been satisfactory.


With a squeegee, done gently. The papers I mainly use are Rives 
Acuarelle and Fabriano Artistico.

>
>Meanwhile, I haven't tested it as well as I meant to -- tests left
>midstream last May need to be started again -- but my experience so far is
>that gelatin brushed onto the top doesn't give as good a size for
>multiple-coat gum as when paper is immersed in the gelatin, which
>permeates it more throroughly.

That may well be. Use ifor carbon and gum is very different.

>
>Also, I find, not all, but many papers will curl if coated only on one
>side.


At what point is curl a problem? During processing or in the finished print?

>
>I'm curious about the glyoxal in the gelatin, however -- that was also in
>the unfinished test series -- glyoxal *in* the gelatin vs.separate coat. I
>got down to those unfinished tests in the alleuvial layer in studio a few
>days ago & found, to my *astonishment,* that the test labelled "glyoxal in
>gelatin" was discolored, the edges where there was a build-up of gelatin
>somewhat carelessly applied apparently, not visible at the time, but now
>VERY discolored.  The "glyoxal separate coat" sheet showed no discoloring.

I think something other than the glyoxal caused the discoloration. I 
have never had any problem of this type with either glyoxal or 
formalin. On the other hand, I have experienced discoloration (bluish 
stain)  using Chrome alum.


>
>
>As Mae West explained, so many tests, so little time... All things
>considered, I see no way to avoid the gelatin soak (& the 3 litres of
>gelatin I mixed last night were NOT enough) but would sure like better
>anti-bubble aid than alcohol.  I think there's one out there...
>

Yeah, that is rather akin to another saying attributed to Mae West, 
"Too much of a good thing is wonderful."  But that soaking, dripping 
gelatin mess ain't no good thing by my reckoning.

Sandy King