Re: To Don (and others, was: )RE: Gum questions - 101

Hi Loris,

I can understand the practical advantage of using acrylic, availability,
price, etc but my concern was more about permanance and in the context of
mixing your own pigments as I intend to do.

Pigment are a known quantity since they have been in used for centuries and
I could say the same about some binders like gum, tempera (eggs), gelatin,
etc. But acrylic as not been around that long and its permanance isn't a
kown quantity as it is for other stuff. Probably we wont live long enough to
know for sure even if modern testing techniques can give us a hint on this
subject. I'm not convinced that every possible factor is considered in those
simulated exposure in these artificial environment. I say this because I
have seen material used in construction that begin to degrade much earlier
then they should.

Yves

----- Original Message -----
From: "Loris Medici" <loris_medici@mynet.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Tuesday, November 15, 2005 6:39 AM
Subject: RE: To Don (and others, was: )RE: Gum questions - 101

Hi Yves,

Well, as Peter Fredrick - the inventor of Temperaprint - use acrylic
paint with his temperaprints, I didn't think about other types of
mediums and/or why he made that choice. Besides, we have artist grade
acrylic paints here in Istanbul for good prices but artist grade tube
watercolors are hard to find and pricey. BTW, watercolor binder may also
contain sugar AFAIK.

The (!) mark was for this reason: acrylic medium becomes insoluble when
it gets dry, gum doesn't get insoluble when dry.

Regards,
Loris.

-----Original Message-----
From: Yves Gauvreau [mailto:gauvreau-yves@sympatico.ca]
Sent: 15 Kasım 2005 Salı 13:03
To: alt-photo-process-l@sask.usask.ca
Subject: Re: To Don (and others, was: )RE: Gum questions - 101

Hi Loris,

Aren't you concerned about using "acrylic pigment(!)" in your work as
you say below?

I just found a source of pigment and they have documentation on making
your own paint. They say that watercolor paints are made of pigment +
gum arabic
+ water. This makes me think that in a way this watercolor paint would
+ be a
much better choice then using some type of polymer (plastic) mix with
pigments. I'm curious to know if there is any advantage in using
acrylic?

Regards
Yves.
Received on Tue Nov 15 06:23:45 2005