U of S | Mailing List Archive | alt-photo-process-l | RE: (1) Gum over Cyanotype on sized Masa paper (rough side) - (2)Pigme

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



Yes indeed -> bad sentence / bad logic... Should have asked that way:
"Are some paints more prone to fast dark reaction?"

-----Original Message-----
From: Katharine Thayer [mailto:kthayer@pacifier.com] 
Sent: Monday, September 24, 2007 5:48 PM
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?



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