[alt-photo] Re: PVA for SIZE & GUM ?

[Keith Gerling]

Paul,

I think PVA size is nothing but diluted PVA glue.  The size looks a little
on the thin side to use as a substitute for gum in an emulsion, but the
thicker glue seems to work.




On Thu, Mar 4, 2010 at 10:56 AM, Paul Viapiano <viapiano at pacbell.net> wrote:

> Henk...
>
> There's always been some confusion over this on this particular list, since
> some substances known as PVA (glues, etc) have been used by experimenters to
> act as the colloid, as gum arabic serves in the process.
>
> However, the PVA size that we have been adopting is a different animal.
> Gamblin is the only brand I've seen and the only one I've used. It is very
> liquid-y, much like the consistency of water or milk. It is sold mainly as a
> size in the preparation of linen and canvas for subsequent oil painting.
>
> Jim Larimer and Steve Dowell first mentioned this product and I started
> working with it, since I was looking for something that didn't involve
> formaldehyde, glut or glyoxal.
>
> I would not try using this product as a gum arabic substitute. I have a
> bottle of glue here labeled "PVA adhesive" for bookbinding and such, but the
> product we are talking about is called "PVA size", two totally different
> things for our purposes and intents.
>
> Paul
>
>
> ----- Original Message ----- From: "henk thijs" <henk.thijs at hetnet.nl>
> To: "The alternative photographic processes mailing list" <
> alt-photo-process-list at lists.altphotolist.org>
> Sent: Thursday, March 04, 2010 8:23 AM
> Subject: [alt-photo] PVA for SIZE & GUM ?
>
>
>
>  Dear List,
>> Made curious about the PVA discussion (I remember threads in 2007 a.o.
>> Katharine and David) about sizing i.s.o. gelatine and glyoxal/formaldehyde.
>> But some years ago i mentioned the belgian gummist Jean Janssis ( very
>> impressive gumprints of about 80 to 100 cm), he told me he used MOWIOL (PVA
>> 8-88) from Kremer  Pigmente not for sizing but in stead of gum arabic.
>> He gave me some data, i made some tests, and yes , it works; it was a bit
>> messy, and i preferred to work with gum arabic.
>> My question is : can we use this PVA stuff for sizing and gum-dichromate ?
>> regards,
>> Henk
>>
>>
>>
>> ------------------------------------
>> www.thijs-foto.com
>> ------------------------------------
>>
>> On 4 mrt 2010, at 17:03, Jeremy Moore wrote:
>>
>>  Dan,
>>>
>>> If you're in a college town check out the art store the students
>>> frequent.
>>> They sell the 32oz Gamblin PVA Size at the unaffiliated school art store
>>> here for $19.99, which is cheaper than I have been able to find it
>>> online--I
>>> believe Jerry's is right over $20 (plus shipping, though I guess I have
>>> tax
>>> to deal with). One of the local profs does use this stuff in his classes,
>>> though, so that may be the reason why we seem to have it in abundance.
>>>
>>> -Jeremy-
>>>
>>> On Thu, Mar 4, 2010 at 9:39 AM, Diana Bloomfield <
>>> dhbloomfield at bellsouth.net
>>>
>>>> wrote:
>>>>
>>>
>>>  Dan,
>>>>
>>>> I've used only the Gamblin PVA, and most art stores sell it.  We have a
>>>> Jerry's Artarama here,  but you could just order it online.  I think
>>>> Jerry's
>>>> is the lowest price I've seen, but even my small local art store here
>>>> sells
>>>> it, too, which is more convenient, but not as inexpensive.  Wherever you
>>>> are, check out your local art supply store, or just order it online.
>>>>
>>>> Diana
>>>>
>>>>
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