MIL-E-12397B, MILITARY SPECIFICATION: ERASER, RUBBER-PUMICE (FOR TESTING COATED OPTICAL ELEMENTS) (18-NOV-1954) [NO S/S DOCUMENT]

MIL-E-12397B, MILITARY SPECIFICATION: ERASER, RUBBER-PUMICE (FOR TESTING COATED OPTICAL ELEMENTS) (18-NOV-1954) [NO S/S DOCUMENT]., This specification covers one grade of eraser for use in testing the abrasion resistance of reflection-reducing films for glass optical elements.