new gum article at alt photo

[Paul Viapiano <viapiano@pacbell.net>]

http://www.alternativephotography.com/articles/art127.html





----- Original Message ----- 
From: "Paul Viapiano" <viapiano@pacbell.net>
To: <alt-photo-process-l@usask.ca>
Sent: Monday, March 16, 2009 10:05 AM
Subject: what about pva sizing?


> Hi all...
>
> What about using Gamblin PVA size?
>
> I know that Jim Larimer likes to use it for gums...has anyone else used it 
> for pt/pd or other processes?
>
> I'd like to buy a bottle today and try it out...
>
> Paul
>
>
>
> ----- Original Message ----- 
> From: "Alberto Novo" <alt.list@albertonovo.it>
> To: <alt-photo-process-l@usask.ca>
> Sent: Monday, March 16, 2009 9:29 AM
> Subject: Re: agar sizing
>
>
> > Damiano,
> > > did you note if it still has adhesive power round 40° ?         8 - )
> > I think you mean if this happens after a warm soaking, like for 
> > resinotype. I don't believe agar swells like gelatin, because you need to 
> > rise the temperature up to 90°C to dissolve it. However, I will check 
> > these days.
> > > is it yellowish or it has other "nuances"?
> > I have a yellowish agar, given me by a biologist, and a perfectly white 
> > (edible) agar bought in a grocery. But also the yellowish one, once 
> > brushed on the paper and air dried, is only barely visible but for the 
> > shine of the sheet.
> > Alberto