Great idea for a thread to start assembling all this info in one place!
Denise has a supply of Melinex 535 4 mil Estar that works very well. (very similar to the 583, I'm sure) It's a Mylar/PET film subbed on both sides for aqueous applications, which I am interpreting to mean inkjet. She sent me some and I've coated a few feet with good results. DuPont doesn't sell retail - only B2B. However, I have a feeling that the stuff is more available than it appears but you have to know where to look for it. For example, there is a supplier of materials for inkjet printers called LexJet that sells a roll film that they cite as being Melinex:
IDK if they would give a sample to try.
I have tried the Graphix acetate with less success than Denise had. You can read the thread "Emulsion Stripping" here http://www.apug.org/forums/forum205/...stripping.html I did finally sucessfully sub the acetate but I had to apply a pre-subbing using nitrocellulose to make it work. The amount of nitrocellulose is very small, though. BTW, I got the PVC to work by using a similar trick with extremely dilute PVC pipe glue but I never tried to coat any real emulsion on it.
The issue with the Graphix acetate is that it is cellulose di-acetate, not cellulose tri-acetate (CTA). In reading the patent literature it looks like the manufacturers in the 1930s gave up on or bypassed di-acetate and went straight to CTA.
Another thing I plan to try is polyester "waterproof" inkjet films intended for silk-screen printing. A few vendors have supplied samples of 4 mil material but I haven't gotten a chance to try coating them yet. The "waterproof" aspect seems to be saying that aqueous inks applied to the film will stay put during processing (whatever process they use) once fully dried down. Thinking about this material was the source of my one comment about inkjet printing the mask in your autochrome/dufaycolor thread.
Finally, it appears that cellulose nitrate needs no subbing at all. But then it has other unique issues.....
Last edited by kb3lms; 05-09-2012 at 04:46 PM. Click to view previous post history.
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