Overview The Raymond Kane Collection of Progressive Proof Books spans the period from 1890 through 1939 and contains forty-two books holding progressive proof prints made with lithographic stones prepared for chromolithographed package labels. The books were kept in stone storage rooms as records of the color separations for jobs printed by four firms: Schmidt & Company, Heywood, Strasser & Voight, American Lithographic Company, and Consolidated Lithographing Corporation. Labels include those...