[alt-photo] Re: Alternative sensitiser

[sam wang]

Hello Loris,

Thanks for the tip on the Gamblin PVA size. But based on Peter's
description, I am beginning to think that it was the weak ammonia I used
that destroyed the sizing. Will try the hydrogen peroxide first.

When I was making casein prints, first color was always no problem. It was
the subsequent layers that stained. The gelatin sized and formaldehyde sized
paper stained a little less but still not so great. Plus I didn't care for
the feel of such sized paper. The only paper I found not to stain
excessively was the Kooh-i-Noor(?) drafting vellum, a beautiful translucent
paper that I have not been able to find for years. Strathmore Bristle was
second, till they changed the formula.

Sam
PS: though we usually want stain-free prints, I've included a couple
moderately border-stained images in my book - where the stains actually
added a great deal of appeal.


On Fri, Apr 16, 2010 at 2:21 PM, Loris Medici <mail at loris.medici.name>wrote:

> Dear Sam, my trials with multiple layer casein were almost equally stain
> free on paper sized with diluted PVAc glue... (Only few bits of powder
> pigment here and there, most probably caused by the fact I wasn't grinting
> /
> mixing the powder enough!) Maybe you should try Gamblin PVA size (or find a
> suitable - transparent, waterproof, PVAc based - paper/wood glue, as I did)
> and see if that works for you.
>
> Regards,
> Loris.
>
> P.S. Nice prints Peter, congrats!
>
>