composition of a soft plastic consistency
See also:term is applied to substances used for various purposes, as e.g. in
See also:cookery, a mixture of
See also:flour and
See also:water with
See also:butter or
See also:suet, for making pies and pastry, or of flour and water boiled, to which
See also:starch or other ingredients to prevent souring are added, forming an adhesive for the affixing of
See also:bill-posting and other purposes . In technical language, the term is also applied to the prepared
See also:clay which forms the
See also:body in the manufacture of pottery and
See also:porcelain (see CERAMICS) and to- the specially prepared
See also:glass, known also as " strass," from which imitation gems are manufactured . This latter must be the purest, most transparent and most highly refractive glass that can be prepared . These qualities are comprised in the highest degree in a
See also:flint glass of unusual
See also:density from the large percentage of lead it contains . Among various mixtures regarded as suitable for strass the following is an example: powdered
See also:quartz 300 parts, red lead 470, potash (purified by
See also:alcohol) 163, borax 22, and
See also:white arsenic x
See also:part by
See also:weight .
See also:Special precautions are taken in the melting . The finished colourless glass is used for imitation diamonds; and when employed to imitate coloured precious stones the strass is melted up with various metallic oxides . Imitation gems are easily distinguished from real stones by their inferior hardness and by chemical tests; they may generally be detected by the comparatively warm sensation they communicate to the
See also:tongue .
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