I am verifying the answers generated by an automatic system to the following question: how were letters sealed in the 1800s
Suggested answer: If the impression is made purely as a relief resulting from the greater pressure on the paper where the high parts of the matrix touch, the seal is known as a dry seal; in all other cases a liquid or liquified medium (such as ink or wax) is used, usually in another color than the paper.
Should I validate this answer?
