Re: (1) Gum over Cyanotype on sized Masa paper (rough side) - (2)Pigment that makes gum insoluble w/o exposure?

To: alt-photo-process-l@usask.ca
Subject: Re: (1) Gum over Cyanotype on sized Masa paper (rough side) - (2)Pigment that makes gum insoluble w/o exposure?
From: Katharine Thayer <kthayer@pacifier.com>
Date: Mon, 24 Sep 2007 07:48:15 -0700
Comments: "alt-photo-process mailing list"
In-reply-to: <011401c7fe73$2652e750$ce02500a@altinyildiz.boyner>
List-id: alt-photo-process mailing list <alt-photo-process-l@sask.usask.ca>
References: <011401c7fe73$2652e750$ce02500a@altinyildiz.boyner>
Reply-to: alt-photo-process-l@usask.ca

On Sep 23, 2007, at 11:21 PM, Loris Medici wrote:

. Are there watercolor
paints (in tubes) that make gum insoluble without exposure?

Very unikely, as gum arabic is the carrier medium in all watercolor paints AFAIK. If a pigment made gum insoluble in water, you'd never be able to use the paint in watercolor painting.
kt

Follow-Ups:
- RE: (1) Gum over Cyanotype on sized Masa paper (rough side) - (2)Pigment that makes gum insoluble w/o exposure?
  - From: Loris Medici <mail@loris.medici.name>

References:
- (1) Gum over Cyanotype on sized Masa paper (rough side) - (2) Pigmentthat makes gum insoluble w/o exposure?
  - From: Loris Medici <mail@loris.medici.name>