Re: what about pva sizing?

[Katharine Thayer <kthayer@pacifier.com>]

I don't know about pt/pd or other processes, but I've been trying it  
for gum and so far not pleased with the results.  Apparently I don't  
have Jim's magic touch, or something.  I believe Jim uses it at full  
strength (if I have that wrong, please correct) but at full strength  
I get a grainy image (will scan example later if I remember to get it  
when I go downstairs) that isn't acceptable to me; I also dislike the  
high shine.  Have also tried it at half strength and 1/3 strength but  
didn't like those either, I forget now why.  Would need to go down  
and look at test prints to refresh my memory.  All I know is, none of  
my experiments with Gamblin PVA sizing for gum were satisfactory to  
me, and I've gone back to gelatin and glyoxal.  This was on Arches  
bright white, a very hard, crisp-surfaced paper;  I suspect it may  
work better on a more absorbent paper.
Katharine


On Mar 16, 2009, at 9:05 AM, Paul Viapiano wrote:

> 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