Diazo Machines, ContinuedMaintenanceDiazo machines fail to perform or become dangerous to operate withoutregular maintenance. Daily maintenance consists of emptying residue bottlesevery 8 hours, replenishing the ammonia supply, cleaning the outside of theglass cylinder, and cleaning the feedboard, receiving tray, and print tray ofdebris and paper scraps. Weekly maintenance is cleaning the inside of thecylinder and wiping the lamp assembly. Lubricating all bearings using a No.10 motor oil and cleaning the suction holes is done monthly. Remove, clean,and dust all hoses annually.Specific safetyprecautionsIn addition to precautions ascribed to electrically powered machinery, diazo-type machines require the following specific safety precautions:store ammonia in shatterproof bottles,protect bottles in storage by securing them in place,handle ammonia bottles carefully to prevent:blindness and bums to personnel,stripping finishes off of surfaces, andnever turn ammonia flow completely off while machine is running.Diazo sensitivematerialsDiazo sensitive materials are papers, acetate, and lightweight cardstockcoated with diazo salts and azo dyestuff emulsion. This emulsion is sensitiveto light. Exposure to light through a transparent or translucent masterdesensitizes areas not protected by the opaque image of the master. Afterdevelopment in ammonia vapor, desensitized areas appear clear and protectedareas appear as the image. Paper comes in different weights and as standardline, continuous tone, and sepia line stock. Drafting film comes as a bluelineor sepia image stock. Foils or acetates, used for transparencies, come innormal intensity colors and pastels, black or color on color backgrounds, andin a variety of densities, weights, and sizes. Cardweight stock is availablewith a metallic shine. All diazo materials fade in time and exposure todaylight accelerates fading. Because developed images retain residualammonia vapor fumes that permeate and deteriorate paper, do not store themwith other file images, particularly photographs.Continued on next page4-15
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
