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Oils or resins tend to darken the paper support drastically, therefore, while the transparency is lost, the color and strength of the paper are closer to that of the original.This presentation deals only with transparent papers.
These resins are more easily soluble, and in a less toxic solvent, than the PVA emulsions.It is therefore necessary to investigate further and test the synthetic adhesive materials and systems available.Comment: The author does not discuss the aging properties of the polyethylene, a substance that is not very stable.