One part of Problem 11 under project NOL-Re2b-41-1-51 was to determine a means of coloring the sensitive end of Mk 54 detonators red without impairing their sensitivity. This was necessary because tests had shown that when coloring is effected by applying a film of red NRC compound (as is ordinarily done) the detonator sensitivity is reduced to the point where reliability of operation in the fuze is considerably lowered. Anodizing and dyeing was suggested as one method of obtaining the coloring that would, perhaps, not impair the sensitivity。A satisfactory method was developed for anodizing and dyeing 0"001 aluminum sheet. Detonators made with sensitive end discs punched from the anodized and dyed aluminum sheet were found to compare favorably in sensitivity with detonators made with uncolored discs.
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