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 196
e often been made to substitute amber for them. But although amber yields varnishes of great hardness and durability, it has the great disadvantage of darkening on heating, especially towards the end of the operation. Hence this operation has been conducted in several successive stages, at the end… … on the small scale. Schrader and Dunicker have, however, devised an apparatus which in one single operation accom- plishes the object in view, and in which over half a ton of amber can be treated in one operation The amber is melted in a cylindrical boiler, fixed above a furnace built of masonry,…
Drying oils · Oils and fats · Varnish and varnishing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
