See also Petroleum.

Production of Consistent Mineral Oils

By weight

I

Mineral oil........ 100 parts

Linseed oil........ 25 parts

Ground nut oil. . .. 25 parts Lime............ 10 parts

II

Mineral oil.......   100 parts

Rosin oil..........   100 parts

Rape seed oil......     50 parts

Linseed oil........     75 parts

Lime............     25 parts

Mixing Castor Oil with Mineral Oils

Castor oil is heated for 6 hours in an autoclave at a temperature of 500° to 575° F., and under a pressure of 4 to 6 atmospheres. When cold the resulting product mixes in all proportions with mineral oils.