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Re: [GBW] Black foil issues
Thanks for on and off list comments. I've done some more testing, but
since the HHI temp is supposed to reach 110 today in Dallas, I'm not
playing with my hot stamper anymore. :-)
But, I do have some results to report.
At a temperature just under 250, copper die on paper:
1. Gold foil holds detail and looks great.
2. Green foil totally blurs and looses all detail; obviously too hot.
3. Black foil leaves no impression at all.
At a temperature 275, copper die on paper:
1. Didn't see the need to test gold or green.
2. Brown foil left impression, not as nice as gold
3. Black foil leaves no impression at all.
At a temperature of 300, copper die, black foil only on paper AND
leather.
1. Paper impression is fairly crisp.
2. Leather impression takes long dwell time and several impressions
(i.e. fresh foil) in order to leave any foil on the leather. Results
still spotty. VERY easy to overdo it and create a muddy impression.
My guess is that's the temp is really too hot but the foil simply
doesn't react at anything lower. Faulty adhesive on this roll?
FYI, I've previously tested the mag and copper die on many scraps of
leather. Plus, I've never had any issues with hot stamping on the
vegetable-tanned leather from Harmatan. It's just the black that's
been troublesome. I don't think it's the leather.
After using half of a brand new roll of black foil and many, many
leather scraps, I'm seeking suggestions for a different manufacturer
of black foil, or, very dark grey. Think I've had it with this one.
Aaron, do you carry any other brands? Any others have suggestions of
good black/dark grey foil manufacturer?
Julie Sullivan
On Jul 31, 2008, at 11:31 AM, Aaron Salik wrote:
Julie,
This one can be a difficult one to diagnose, but I would try a few
things.
First try stamping onto a sheet of paper or other material to make
sure the
adhesive on the foil is sound. This will also help in tweaking the
temperature to find the right setting, and getting a better "feel"
for the
foil. I would also try stamping onto a different piece of leather
to see
how that goes, as sometimes it is an issue of incompatibility of the
adhesive and the finish on the leather.
I am not sure how I feel about using the glaire, but I would try a
paste
wash on the leather. If it is an issue with the adhesive not
liking the
finish on the leather, this may help provide a better surface for
it to go
down.
Colored foils can be finicky, and from what I hear white is
normally one of
the worst. I have also heard in desperate situations of people
stamping one
color that they know works (in your case gold or silver) to create a
foundation, and then stamping the next color down on top of this.
In your
case I would be weary of such an obvious color not being completely
masked
around the shoulders of the impression, and is more useful in times
where a
similar of non-obtrusive color (such as clear) is found to be working.
I would also continue to play with the temperature, pressure, and
dwell time
as it's really is the proper mixture of these three elements that
will yield
the best results.
Of course there are people here with MUCH more experience than
myself, and
would be interested to hear their suggestions as well.
Regards,
Aaron Salik
Talas
20 West 20th Street
New York, NY 10011
212-219-0770 Phone
212-219-0735 Fax
http://talasonline.com
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****************************************************
GBW: The email list for GBW member communications
GBW Standards - October 16-18, 2008
Toronto, Ontario
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The GBW website is supported and maintained by
Conservation OnLine http://palimpsest.stanford.edu/byorg/gbw
To post messages, email to GBW@xxxxxxxxxxxxxxxxxxx
For problems, contact Eric Alstrom, List Manager:
gbwlist@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
For info about the list, visit http://mailman.lib.msu.edu/mailman/listinfo/gbw
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