Kremer Manila Copal gum - resin - pieces

Copal is a hard diterpene resin - the hardest being the fossile ones. The term "Copal" denotes a variety of different countries of origin and provenance; they usually form hard oily varnishes, by means of a somewhat complicated cooking process which renders them soluble in oils and turpentine. In the Middle Ages, copal was confused with amber. Often used as an insulating varnish over tempera underpaintings.

Soluble in ethyl alcohol/ethanol