Proofpaper

The success of DYLUX proofpaper could be attributed to these characteristics ... 

Coating solutions are tested prior to producing product on a large coater. With DYLUX 503B proofpaper, one could readily see if the recipe worked , i.e., that it had the correct performance characteristics when newly coated. Of course, prediction of the long-term performance is guesswork. 

Finally the finished paper product is packaged. For DYLUX proofpaper, it was found that paper bags, with a foil laminate on Kraft paper were acceptable. These were sealed after finishing. Ultimately, labels had to be available that could identify the product these also contained a code which related to manufacturing date. 

Shown is a sample of exposed DYLUX 503 Proofpaper, folded to illustrate image formation by sequential exposure on both sides with ultraviolet light through a lithographic negative. 

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