NPFC - TT-F-325
FILLER, ENGRAVING, STAMPED MARKING
|Publication Date:||16 September 1965|
The filler covered by this specification is a semisolidified compound of drying oil or resin and pigment which, when applied to engraved or stamped markings or graduations, hardens and becomes a permanent filler.
The filler covered by this specification is to be used for filling stamped or engraved markings on metals, glass, ceramics, and plastics.