george koller on sun 9 jun 02
Hi All,
Recently I have been asked to evaluate a style of art which
will require drawing fine lines. It seems clear to me that
the idea should be to use a minimum of a concentrated colorant
material....
My question is regarding the chemistry/physics of the materials
at the moment a tiny droplet of metal sulfate is put on top of a
glaze: what can be done to discrourage dispersion?
Thanks,
George Koller
Logan Oplinger on wed 12 jun 02
Hello George,
From what I remember reading of the development of inkjet printing in
color, the salt (color) dispersion sounds similar to what would happen when
poor quality inks were applied to a regular grade paper, the colors would
bleed into one-another. As the quality of inks and papers have improved,
so have the quality of the prints.
If I properly understand the process of inkjet printing on a glazed
surface, it may be necessary to to do one or two things to prepare the
glaze/ink before application.
1. Apply a "fixative" to the glaze surface that will allow the droplets of
salt-ink to sit on the surface until dry without bleeding into the glaze.
2. Prepare the salt-ink with an additive (CMC?) or one that will increase
the surface tension that will hold the droplets together at the glaze
surface.
3. Prepare the glaze surface by applying a chemical fixative (ammonium
carbonate?) that will react with the salt-ink to precipitate in place
insoluble carbonates of the metal sulfates. (This method may not work well
if a chemical fixative alters the composition of the glaze enough to change
its firing qualities).
4. A combination of the above.
Sincerly,
Logan Oplinger
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
On Sun, 9 Jun 2002 14:16:39 -0500, george koller wrote:
...
>Recently I have been asked to evaluate a style of art which
>will require drawing fine lines. It seems clear to me that
>the idea should be to use a minimum of a concentrated colorant
>material....
>
>My question is regarding the chemistry/physics of the materials
>at the moment a tiny droplet of metal sulfate is put on top of a
>glaze: what can be done to discrourage dispersion?
...
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