>>
>>There you go Hans. The Masters have spoken;-) What is your procedure?
>
>We have just made a final transfer. Shall we send you the yellowish STS?%>))
Why not?
>The procedure we use is what you describe as triple carbon (almost):
>Y-exposure, transfer, development on plastic, drying;
>M-exposure, transfer to the plastic with Y-layer, development etc;
Aha! Now I see why you still have a few hair left to pull out: you are
cheating;-) For your procedure to work at all, you have to coat your
pigmented emulsion on a *dimensionally stable* support (e.g. polyester or
polypropylene) prior to exposure otherwise automatic (pin) registration
would never work. With the "traditional" process, I used pigments on
*paper*, which requires manual and visual registration
>C-exposure, transfer to the plastic with YM-layers etc.
>This means - very often - a rather thick layer. After drying we transfer to
^^^^^^^^^^^^^^
Especially if it is a dark, low-key image.
>a STS (paper). Dry and peel off the plastic. Then transfer to final paper
>in warm water. And the thrownaway STS is yellow where the thick and dark
>parts from the image were. After drying we clear in pot meta bisulf, dry
humm... for a moment I thought that your yellow stain came from the yellow
pigment layer, but it is *away* (as it should for technical reasons) from
the STS... Your procedure is very different. You are developing one layer
(Y) and after drying it leaves a solid yellow (pigment) image on plastic.
Then you are transferring the next exposed color (M) right on top of the
dry yellow and since everything is on stable support and pin registered (I
presume) everything falls into place and you develop your magenta right on
top of the yellow. Ditto for cyan. When all is done you transfer this
tricolor image onto the STS which somehow ends up with a yellow
"dichromate" stain...
With the "traditional" method, as I have arbitrarily defined it, each
exposed pigment layer is transferred from a *PAPER* base and developed on
three *separate* plastics. These images, after drying, are transferred one
at a time onto the STS which in the end will keep nothing (pigment or
dichromate stain) before leaving the image alone on the final transfer
paper. It is as if sowehow our (Sandy and mine) method allowed more of the
soluble dichromate to dissolve in the extra baths of cold water. I'll have
to think about this one for a while...
Not that it would make that much difference but how much soaking time in
cold water do you use before you transfer each exposed tissues onto the
first Temporary plastic support for developing?
>again and finally we harden in formaldehyde (will try glyoxal later on).
>That is our process. Another master has spoken:>))
>Hans & Chia
Luis Nadeau
awef6t@mi.net
nadeaul@nbnet.nb.ca
Fredericton, New Brunswick, Canada
http://www.micronet.fr/~deriencg/nadeau.html
http://www.primenet.com/~dbarto/lnadeau.html#A0