Digital BW, The Print

<paulmwhiting@...> wrote:

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> ... I want to mix up Paul Roark's C6c base, which calls for glycerol. My
> pharmacy only stocks glycerine... is that the same thing?
>
Yes, glycerine = glycerol (aka glycerin). See
http://en.wikipedia.org/wiki/Glycerol

Note also footnote 8 of http://www.paulroark.com/BW-Info/Ink-Mixing.pdf .
 I use 99.7% pure.  I'm not sure what purity is needed.  Someone once
commented that Walmart had glycerin.  I went into one and looked at what
they had.  It appeared to me that it was simply a cosmetic that was mostly
glycerin, but it had other things in it to make it smell nice, etc.  I
suppose nice smelling ink is OK, but I don't know what affect other
chemicals might have.  So, I'd stay with as high a purity as is practically
available.  Overall the ink cost is going to be so low as to not be much of
a factor in printing.

Also,  unless you are going to print on Arches watercolor paper, there is
no need to go to the C6c version with the additional surfactant in it.

Good luck with the mixing.

Paul
www.PaulRoark.com

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