A sine qua non is that the glass be hot enough to melt the shellac.
The cement consists of a mixture of shellac and 10 per cent of oil of cassia.
It is then coated with shellac by heating and rubbing upon the shellac.
On no account must the shellac be allowed to get overheated.
Shellac is the most common and the most useful of the spirit varnishes.
In the process just described, shellac alone, dissolved in alcohol, is used.
Quick drying varnishes, like shellac, are applied, with but little on the brush.
Use with oil on shellac and with oil or water on copal varnish.
This casing was separated from the pattern and given a coat of shellac on the inside.
Such cement is prepared by a solution of Shellac in Ammonia.