Other experimenters tried various "secrets," which for the most part meant deleterious glues and varnishes.
As the edges of the wound are brought into accurate apposition there is little or no blood lodged between them, so that an extremely narrow strip of fibrin glues the cut edges together.
My brother studied bookbinding as a profession - I think the glues used varied according to which parts you were gluing to what.
There is a significant exposure to formaldehyde in the construction industry from paints, hardboard, rockwool, plastics and waterproof glues.
He started out as an applied chemist working with plywood glues, urethane foams, and other formulated compounds.