[alt-photo] Re: A PVA postscript

[Diana Bloomfield]

Thanks for the update, Henry.  So when you say using PVA on paper that  
hadn't been pre-shrunk was not a good idea-- is that because there was  
too much internal sizing in the paper, so hard to coat the PVA, or  
that just meant too much sizing overall, and everything washed off?

I have to admit, I never had a lot of luck with the PVA, or was very  
happy with the results using PVA-- except on BFK Rives paper (in all  
its varied forms/weights).  I think you'd probably like that if you  
gave it a try.

Interesting.  Thanks again.

Diana
On Apr 2, 2010, at 1:08 PM, Henry Rattle wrote:

> My first, reasonably successful, trials of PVA as a size for  
> tricolour gum
> were carried out on paper which had not been preshrunk. Not a good  
> idea, as
> it turns out. Moving on to using Gamblin PVA at 1+1 dilution for  
> prints on
> preshrunk paper, I find that while Fabriano Artistico (cold-press,
> traditional white) still works reasonably well, my favourite Saunders
> Waterford HP reacts badly. After preshrinking under mild conditions  
> (1 hour
> in water at 25C) first gum (yellow) coat seems to work OK, but the
> subsequent (magenta) coat is horribly blotchy and clears very badly  
> and
> unevenly. Looks as though internal sizing has washed out so that the  
> PVA
> doesn't go on evenly. A control with gelatin sizing looks fine with  
> the same
> coating and treatment.
>
> Wonderful stuff, gum - just one variable after another...
>
> Best wishes
>
> Henry
>
>
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