The manufacture of varnishes : oil crushing, refining and boiling and kindred industries : describing the manufacture and chemical and physical properties of spirit varnishes and oil varnishes, raw materials, resins, solvents and colouring principles, drying oils, their extraction, properties and applications, oil refining and boiling, the manufacture, employment and testing of various varnishes (1899)
Livache, Ach. (Achille), M'Intosh, John Geddes · London : Scott, Greenwood · leaf 172
160 GUM POTS. They, however, are inconvenient for the fusion of certain copals which froth much, especially Sierra Leone, which is- profitable to work in spite of this deficiency on account of its relatively low price and good quality. In such cases the pan is placed in a basculed truck, by which… … Fig. 5. in the furnace, but it is preferable to furnish them with an iron ring, which enables them to rest solidly on the plate of the furnace, and which, measuring at least two inches in w4dth,. has the further advantage of cutting off all communication with the fire, and consequently diminishing…
Drying oils · Oils and fats · Varnish and varnishing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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