Re: Kodalak/amyl acetate


Richard Lahrson (tripspud@hooked.net)
Sun, 11 Apr 1999 08:51:07 -0700


Sil Horwitz wrote:
>
> At 99/04/10 10:27 PM -0700, Hal wrote:
>
> >In Book 3 (my copy is dated 1968) Ansel stated (p118)
> >
> > "PRINT VARNISH
> > Proprietary varnishes are entirely adequate. The prime requisites are
> >purity of ingredients and good color -- rather, lack of color when applied
> >to the prints. Paul Strand has kindly given me his formula for surfacing
> >prints (in his own words): 'First one buys a small can of lithographer's
> >varnish No. 1.... This should last for years. Next one buys a bottle of
> >Carbona (carbon tetrachloride), the solvent for the varnish...
>
> That's the problem with those old books! The use of carbon tetrachloride is
> illegal as it is very toxic in enclosed areas, besides being a carcinogen. I
> don't worry about most of the chemicals we use, but carbon tet is a real
> killer! When you use any formula, you should know the characteristics of the
> chemicals you will be using, and this is especially true when attempting to use
> old formulas. If you are going to APIS in July, I will be explaining this in
> detail in my talk "The Chemicals We Use."

Hello,

     Looking back, I seem to remember using something else besides the carbona.
Something I got from a printing house, I can't recall exactly; some kind of
a printer's thinner, a marketed product.

                             Cheers,

                                        Rich Lahrson
                                        tripspud@hooked.net



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