Re: PVA vs. PVA

P.S. My "PVA glue" is white, so I assume it's of type (1) below, and
would not work for gum printing even if I could get it to mix with the
dichromate. Also, in my small experiments with gloy, which would be of
type (2) in David's taxonomy, I didn't find that it clotted intially
with dichromate; it mixed easily just as gum does.
kt

davidhatton@superonline.com wrote:
>
> Hi All,
>
> In my eternal quest to distill art from the depths of space between my
> ears and apply it ( the art) to paper I have determined the following:
> 1)
> PVA - white but dries clear - soluble in water - used as a
> waterproofing agent and plasticizer in cement etc..Does indeed work as
> a size applied once diluted 1 - 12 with bottled water. When dry it is
> insoluble in water.
>
> 2)
> PVA - trans/lucent/parent and sold as 'gum' - mixed 1 - 3 with bottled
> water - initially rejects Potted dick solution, clotting with the
> pigment. After leaving to stand for a couple of days at room
> temperature, PD solution is not rejected and mixes well with pigment.
> It is very fast exposure wise and is soluble in water unless hardened.
> It also renders nice tonal images from diginegs and shows superb
> detail (if required of course).
>
> I know nothing about co-polymers, polymers. This is just empirical I
> also think it helps to be slightly anxious.
>
> David H (from temporary UK residence so you may never see this)
>
> --- Orjinal mesaj ---
> From:
> To:
> Cc:
> Sent: Wed Aug 03 00:59:08 EEST 2005
> Subject: Re: PVA vs. PVA
>
> Quoting Katharine Thayer :
>
> > Since no one answered my question about why PVA rather than acrylic,
> I
> > decided to answer it myself and went out to size some papers with
> (1)
> > PVAcetate and (2) acrylic medium, to print with gum and compare. But
> > right away I realized I have a problem, because my PVAcetate doesn't
> mix
> > with water; it precipitates out in clumps when mixed with water.
>
> All the PVA glues I've ever come across were water based, easily
> diluted with
> water, and softened by water even after they have set.
>
> --
> Peter Williams
>
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Received on Fri Aug 5 12:30:21 2005