brass-rubbing

[bras-ruhb-ing, brahs-] /ˈbræsˌrʌb ɪŋ, ˈbrɑs-/
noun
1.
an antiquarian's technique for copying designs from incised brass memorial slabs and the like.
2.
a copy made by brass-rubbing.
Compare rubbing (def 2).
Origin
1885-90