romeo-1
Gold Member
Found this large "O" type block this afternoon and am hoping someone may know the approximate age. Has RICHARD on both sides. Thanks!
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While often referred to as “lead type,” type is, in fact, a variable alloy of 54-86% lead, 11-28% antimony and 3-18% tin. Antimony hardens the metal. Tin toughens the metal, counteracting the brittleness of antimony, as well as increasing the fluidity of the molten metal. The exact alloy chosen is based on the type of machine it is to be used in.What is the material it is made of?
Sorry. I saw Richard in the photo, I just don’t see what it means. Thanks2nd pic in the recessed area