1867 Six Hundred Receipts by John Marquart

118 600 MISCELLANEOUS VALUABLE EECEIPTS.

They are most valuable

useful for several purposes.

when so manufactured as to be colourless. They are much used in preparing varnishes, and, in oil- pamting, are not unfrequently employed as a var- nish, either alone or diluted with a little oil of tur- pentine. No. 228. How to prepare Linseed- Oil to Boil Varnishes, Take 5 gallons green linseed-oil, IJ pounds Put all together into a proper vessel, and let it boil 1 J or 2 hours then it will be ready for use when cold. You must also strain it. litharge, and IJ pounds amber.

No. 229.

mix with Paint.

Boio to boil Linseed- Oil to

Take 2^ gallons green

14 ounces

linseed-oil,

litharge, and 4 ounces amber. until it is clear from scum,

Boil all together

— say 6 or 8 hours ;

be

careful in stirring it well. If you want to have the oil to dry very quick, add double the quantity of litharge and amber.

No. 230.

How to No.l. The foundation of all varnishes are gummy and resinous substances, and the only liquids that can be combined with them, so as to form varnishes, are oils, spirits of turpentine, and spirits of wine. To make copal varnish: Take 22 ounces gum copal, (good and clear,) and dissolve it in a proper make Copal Varnish.