U of S | Mailing List Archive | alt-photo-process-l | Re: Thank you for the alt-list and PVA size

Re: Thank you for the alt-list and PVA size


  • To: alt-photo-process-l@usask.ca
  • Subject: Re: Thank you for the alt-list and PVA size
  • From: Paul Viapiano <viapiano@pacbell.net>
  • Date: Wed, 11 Nov 2009 12:44:45 -0800
  • Comments: alt-photo-process mailing list
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Francis...
 
I usually put down the first of three layers in a tri-color without size. Then after that I brush on PVA 1:2. It's fine for the next 2 coats. No stain...even when the third coat is blue.
 
p
 
 
 
----- Original Message -----
Sent: Wednesday, November 11, 2009 12:35 PM
Subject: Thank you for the alt-list and PVA size

Gordon,

Sorry to hear about what U of S did to your position. This list has been an incredible resource for getting re-immersed in gum. Don't picture that!

Inspired by the discussion of alternatives to gelatin sizing I have incorporated Golden's PVA size into a one color (and multi-color) assignment for my alt photo I class.

My question is: Has anyone done test to determine if PVA sizing is needed for each layer (coat / exposure) of gum? I was under the impression that because of the dilution (1:2) or because it is water based that long soaks in water would strip away enough of the PVA to allow staining to occur.  After observing how stubborn PVA adheres to the plexiglass I am coating on, I am wondering if extra coats are needed.

I am just foam brushing on the PVA size, 1:2, onto BFK  Rives.

-francis schanberger





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francis schanberger

www.frangst.com