The labels were produced on Vacumet's HoloPRISM wet-strength paper
substrate, which was overprinted with conventional inks--the graphics matching the six-pack carrier.
Unfortunately, positive zeta potential numbers may be "normal" in a different paper mill, especially if a wet-strength paper
grade is being made.
Other examples of nonplastic substitute items developed for shipboard operations include disposable hot-drink paper cups, powdered cleaners in water dissolvable packets, and wet-strength paper
The coated, fine-paper operation also produces wet-strength paper
that is used for beer labels.
That these papers were well made is attested by the following statement in a letter of commendation from the Office of Chief of Engineers, War Department, "Millions of maps have been printed on this high wet-strength paper, and their superior durable qualities have proved eminently satisfactory to troops in all theaters of war.
Weber, Notes on resin-bonded, wet-strength papers, Printing Equip.
The products include super-calendered semi-gloss products and smooth uncoated wet-strength papers