Ozalid (trade mark)

Ozalid machine in use with the City of Seattle, City Light office, circa 1954.

Ozalid is a registered trademark[1] of a type of paper used for "test prints" in the monochrome classic offset process. The word "Ozalid" is an anagram of "diazol", the name of the substance that the company "Ozalid" used in the fabrication of this type of paper.

  1. ^ Serial 71,260,891, United States Patent and Trademark Office