From: Chris Patterson (email@example.com )
Date: Fri, 19 Oct 2001 09:17:22
With sheetfed litho inks the skin is a result of a chemical reaction between the metallic driers/resin vehicle of the ink and atmospheric oxygen. The ink has essentially polymerized and would not generally be re-useable within fresh ink.
Many ink companies now offer sheetfed products that stay open for significantly longer periods (oxidize & skin less rapidly). You may want to explore that option to determine if it can reduce your waste.
Additionally you could look at ways of preventing skinning - re-using skin paper, inert gas purging, re-storing product under vacuum. These may or may not be viable depending on your situation and again it is best to discuss this with your ink supplier.
I would contact your ink supplier for assistance with Mixmaster.