Re: First print on Al
Loris and Keith.
The gesso I used was Stevenson's acrylic gesso. If this is the
problem, I will switch to Liquitex.
Will try a thinner mix and see if pumice instead of CaCO3 will
diminish the super-white.
I have still to find a source for pumice locally - Keith, where did
you get yours from?
The uneven gelatin spread does not seem to translate into any
observable discrepancies.
However, the colors do not merge between passes as they do on a paper
medium. So one has to pre-mix color combos to get desired effects.
I add everclear along with HCHO before spreading.
Will use a roller instead of a brush.
The Al plates were discards from a printing house. The new batch I
have is thinner than the previous one and I will make doubly sure
that they are squeaky clean before priming them.
Many thanks! Rajul
Once again, Thank you. Rajul
On 20-Mar-09, at 12:47 AM, Loris Medici wrote:
Yes, I feel got a hold on it with this trial -> I'm very excited
about the
next ones... (Have to fiddle-a-little with the negative first.)
Adulterant: Calcium Carbonate - since it isn't supposed to be
there... (At
that concentration.)
I don't get this bubble thing, I haven't experienced something like
that.
Are you using the same acrylic ground as Keith? (Liquitex.)
Try to decrease gelatin strength + add some rubbing alcohol just
before
application. Maybe it's too strong and sets before you finish
brushing???
Regards,
Loris.
20 Mart 2009, Cuma, 12:54 am tarihinde, Rajul yazmış:
LORIS - It must feel good that the first print is done.
What is adulterated gesso? What color does the adulterant impart to
the ground?
After 2 gum passes, the first of my prints cracked in one spot, and
small water bubbles are still visible. Perhaps they will be less so
after further passes. The texture of the brush-applied ground and
brush strokes from the gum emulsion actually seem to lend a different
kind of interest to the print.
Application of a 4% formalin-hardened gelatin was uneven (unlike that
on paper media) but this is not very obvious in the print-in-
progress.
KEITH - can you provide the composition of the thinner gesso mix you
use and how many layers of it do you apply? How many gum passes does
your gessoed Al allow for?
JUDY - the gesso-gelatin size seems interesting but the difficulty in
using it with Al sheets seems to lie in keeping the size molten
through the application of multiple coats of it with a roller.
Thanks for sharing your experiences. Rajul