This natural insect secretion is the base component of every traditional protecting varnish. In alcoholic solution, it is applied directly on to the surface gilded by metal leaf with various techniques. It prevents possible leaf tarnishing; the light transparent layer is especially scratch-resistant and achieves a final protection of the handmade piece.
These water based products are a valid alternative to shellac. They have an easy application, and protect the leaf against possible tarnishing very well.