Later, ground cork was mixed with the linseed oil and then it went by
its Latin name, "linoleum."
The next step was to cut loose altogether from the natural oils and use
for the varnish a solution of some of the cellulose esters, usually the
nitrate (pyroxylin or guncotton), more rarely the acetate. As a solvent
the ether-alcohol mixture forming collodion was, as we have seen, the
first to be employed, but now various other solvents are in use, among
them castor oil, methyl alcohol, acetone, and the acetates of amyl or
ethyl. Some of these will be recognized as belonging to the fruit
essences that we considered in Chapter V, and doubtless most of us have
perceived an odor as of over-ripe pears, bananas or apples mysteriously
emanating from a newly lacquered radiator. With powdered bronze,
imitation gold, aluminum or something of the kind a metallic finish can
be put on any surface.
Canvas coated or impregnated with such soluble cellulose gives us new
flexible and durable fabrics that have other advantages over leather
besides being cheaper and more abundant.
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