U of S | Mailing List Archive | alt-photo-process-l | Re: Gum Calibration 2 (How to read color samples?)

Re: Gum Calibration 2 (How to read color samples?)



Hmmm, I see. Which pigments (or paints, if you can't be that precise) do
you use?

Best regards,
Loris.


24 Ekim 2008, Cuma, 10:17 pm tarihinde, davidhatton@totalise.co.uk yazmış:
>
>
>  Hi Loris,
>  Maybe but,
>  All my pigments are diluted 15ml to 150ml paint to gum. Any less and they
> get very wishy washy (insipid).
>  David
>
>  On Oct 24 2008, Loris Medici wrote:
>
>  David, could it be that the pigment concentration is too much? I think
> the
>  problem lays right there. In an article by Sam Wang it was written that
> he
>  mixes his color to a saturation and luminosity close to the test patches
>  found in color newspaper (usually printed somewhere in the bottom or in
>  the middle of two pages). And I remember Katharine writing something
> about
>  this too...
>
>  Regards,
>  Loris.
>
>  P.S. Going to mix a new batch of gum (from powder) that will be used to
>  make stock solutions...
>
>  I will start with:
>
>  1+3 PY151 (15ml paint giving total 60ml stock)
>  1+5 PV19 Rose (15ml paint -> 90ml stock)
>  1+7 PB15:3 (15ml paint -> 120ml stock)
>
>  and dilute more as necessary.
>
>
>  24 Ekim 2008, Cuma, 9:06 pm tarihinde, davidhatton@totalise.co.uk
> yazmýþ:
>  >
>  >
>  > Hi Loris,
>  > Your idea sounds good, however it doesn't fit with the instructions
>  > which come with the product and I haven't tried it. Give it a whirl
>  > and let us know how it goes. The problem I have with both these pieces
> of
>  > software is that, yes you get a good curve for each individual colour
> and
>  > yes you will get a fully tonal print from each colour, but when you lay
>  > one coat upon another all bets are off. The resulting images (IMO) are
>  > far too dark/dense.
>  > Good Luck though
>  > David H