1867 Six Hundred Receipts by John Marquart

600 MISCELLANEOUS VALUABLE RECEIPTS.

121

for mixing with colours to paint with, instead of oil, from its w-orking and spreading better in the pencil.

No. 235. To dissolve Copal infixed Oil

Melt, in a perfectly clean vessel, by a very slow heat, 1 pound clear copal; to this add from 1 to 2 quarts prepared linseed-oil. When these ingre- dients are thoroughly mixed, remove the vessel from the fire, and keep constantly stirring it till nearly cold ; then add a pound of spirits of turpen- tine, strain the varnish through a piece of cloth, and keep it for use. The older it is, the more drying it becomes. This varnish is verj^ proper for wood- work, house and carriage painting. No. 236. Amber Varnish. Amber varnish forms a very excellent one : its solution may be effected by boiling it in di png lin- seed-oil. Oil varnishes which have become thick by keep- ing are made thinner with spirits of turpentine.

No. 237.

Linseed- Oil Varnish.

Boil any quantity of linseed-oil for an hour, and 'to every pint of oil add i pound good clear rosin, well powdered; keep stirring it till the rosin is per- fectly^ dissolved and, when this is done, add 1 ounce 11