New inexpensive microfilm methods in company and design institute activities

Abstract

Ultra-violet ray sensitive diazo material types, representing the cheapest photosensitive substances, have been used mainly by design institutes and industrial companies, and only for heliography purposes so far. Projection printing from microfilms was performed only to photopaper involving, particularly in case of large dimensions, an extremely expensive procedure.
By means of the CAPS-JEFFREE automatic enlarger, magnifications can be continuously made from microfilms to diazopaper, or any other photosensitive material, moreover, even to paper or aluminium offset plates by making use of ultraviolet rays.
This methods leads to significant savings in the storage and processing of design schemes and engineering drawings, due to the better application possibilities of microfilms, and since the drawings to be microfilmed need not be drawn on expensive tracing paper.
By using the CAPS-KALVAR copy method, prints can be made from negative microfilm reels or films mounted to punch cards, in a few minutes, to positive Kalvar film material through xeroxprinting.