RE: Pigments for Tri-Color-Gum?

> -----Original Message-----
> From: Loris Medici [mailto:lorism@tnn.net]
> Sent: Monday, November 24, 2003 6:40 PM
> To: alt-photo-process-l@sask.usask.ca
> Subject: Pigments for Tri-Color-Gum?
>
> ...
> Red/Magenta: Sam doesn't mention a specific red/magenta
> color. So again looking to the color table I saw the 548
> Quinacridone Red. It is an A
> (II) rated permanent, transparent, non staining, series 3
> color. What can you say about Quinacridone Red for
> tri-color-gum printing?
> ...

I further searched in the web (and found a wonderful site called
handprint - extensive information about watercolor pigments, papers
ect.) thought that WN 502 (Permanent Rose - PV19 Quinacridone) would be
a better alternative to WN 209 (Quinacridone Red - PR209 Quinacridone).
This is a deeper/stronger red. My problem is that it is marked as a
"staining pigment". So I would like to ask:

Red will be the last layer on the tri-color-gum (as described by S.
Wany). Below red, there will be cyanotype and yellow gum layers. So,
should I care for the paper staining property of the red pigment? Will
the yellow gum layer protect the paper support from the red staining?
Or, can the yellow gum layer also be stained by the overprinted red
layer?

I know; you may say "test it and see it yourself" but the WN watercolor
tubes are "special order" items where I live. So, they're extra
expensive and delivery takes time also. As I don't want to waste both
time and money I prefer to ask to you (people with knowledge and
experience) first.

Another question:
>From where I can order the pigments mentioned above in dry powder form?
(PY153, PR209 or PV19) I think dry pigments would be a better
alternative than tube pigments - more convenient, much more
economical...

Thanks in advance,
Loris.
Received on Tue Nov 25 06:26:35 2003