Shellac

[Marquetta]

Lac resin melted into thin flakes, used for making varnish.

[Little_Girl]

a substance obtained from an insect that is melted into small thin pieces and used for making varnish (= a liquid for painting onto surfaces to make them shiny) and for many other purposes:

[Monty]

A resinous substance (obtained from the lac insect) melted into thin flakes, used for making varnish.