Re: Old carbon tissue
Title: Re: Old carbon tissue
Doug,
You can go much higher with the development water, up to 120-125
F. This may help a lot with older tissue.
Sandy
At 2:22 PM -0400 7/6/07, dhowk wrote:
I presume "going bad" is
gradual (though quicker than I expected ;-( I had some
problems today with getting adhesion to the final support. Did a test
as Sandy recommended, and the pigment did eventually dissolve. So,
placed a blotter paper under the sandwich, and applied more pressure
(heavy glazed tile). Also raised the temp of the developer bath
to above 105f. Did get tissue separation & adherence to
final support. Cut up & froze remaining B&S tissue so I can at
least continue experimenting with the process.
Doug Howk
On Jul 5, 2007, at 2:19 PM, Sandy King
wrote:
Carbon tissue will definitely go bad with
age. How long depends on pigment, gelatin and storage. It is best
stored frozen.
You can tear off a small piece and put it
in hot water to see if the tissue has gone bad. If it is good, the
gelatin should melt and the pigment should ooze out. If the gelatin
has hardened, it will not melt and nothing can save it.
Sandy King
At 5:57 PM +0000 7/5/07, Marek Matusz
wrote:
Can somebody give me some advice.
I was trying to print carbon prints
using B&S tissue. I have made carbon prints before, but I am not
an experienced printer, as a matter of fact I am totally intimidated
by the process. Here is what my problem was yesterday. I
exposed, soaked the tissue and mated it to the final support. The
tissue and the suppot were very hard to separate. (i need to mention
this is a single transfer process, from tissue to the final support).
AT 105F and 10 min soak I could not get them apart. That was one
ruined print. I then tried 110 and 120F soak and could not get the
gelatine to soften to get a nice separation of the tissue. On top of
that the development was very slow and I kep raising water temperature
for development as well. I kept cutting exposue as I was getting
all hardened gelatine and almost no image. I ended with 1 min BL
exposure time (this is a very short exposure), but did not end up with
a decent image. AT that point I ran out of sensitised tissue and
decided to quit for the day. ANy suggestions? DOes carbon tissue go
bad on storage and how would I recognise it?
Marek M
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