[alt-photo] Re: A PVA postscript

[Diana Bloomfield]

Oh, I see.  Thanks.  I just saw Jeremy's post.  I use lukewarm water,  
too, and just let it soak for a long while, while I go do something  
else.  I've never used super hot water, but a few people have posted  
that using really hot water does something to that internal sizing, so  
everything becomes sort of mottled (?).

Diana
On Apr 2, 2010, at 1:31 PM, Henry Rattle wrote:

> In my case, it wasn't a good idea because I normally pre-shrink - so
> shouldn't have taken a shortcut by doing the tests without the  
> preshrink. I
> used to be a scientist - should know better!
>
> Best
>
> Henry
>
>
> On 02/04/2010 16:28, "Diana Bloomfield" <dhbloomfield at bellsouth.net>  
> wrote:
>
>> 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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