Re: Dichromate/ size/tricolor/pigment

Peter Charles Fredrick (pete@fotem.demon.co.uk)
Sat, 27 Jul 1996 18:43:55 +0000

In a message dated 96-07-21 11:26:12 EDT, you write:

<< Yes I have used acrylics in my Fotempera process for a number of years,
most
work quite well >>

Hmmm.... As a painter, I thought that acrylics become non water soluble after
they dry without any need of extra hardening, but I am surprised to know that
acrylics have been used in alternative processing. Do they still wash out
after they dry? Is it because of the higher temperature used in development?

Hello Dave

Yes as a painter I can understand your thoughts, Judy Seigel had similar
reservations as your good self.However fools rush in where angels fear to
tried I am an experimentalist by inclination and nothing is sacred
!.generally this means that I come a cropper quite often, but sometimes the
gods smile on me, more in pity or perhaps perversity, who knows ;-).

Enough
of this nonsense the fact is as long as you do not exceed a ratio of one
part of pigment to three parts colloid you are OK. I have found that a five
parts colloid to one of pigment is about right, if you further dilute the
pigment it will work as as if there is no acrylic present. My preferred
process is fotempera and there are positive advantages in using acrylics as
the egg colloid although extremely adhesive, it is also rather soft and
waxy and scratches easily when first processed, the acrylic helps to
stiffen, and protect the coat until the slow natural polymerisation takes
over. Why don't you try it out I am sure you will not be disappointed.

My best wishes pete