Fire- proof Paper.
# ; — Fire-proof paper, for printing and writing purposes, is now manufactured in Berlin by a new patented process. Ninety-five parts of the asbetos fibre of the best quality are washed in a solution of permangate of calcium and then treated with sulphuric acid as a bleaohing agent. Five parts of wood pulp, as used in papper factories, are added, and the whole is placed in the agitating box with an addition of lime water and borax, After being thoroughly mixed the material is pumped into the regulating box, and allowed to flow out of a gate on an endless wire cloth, where it enters the üßual paper-making machinery. It is easy to apply water marks to this paper, which ordinarily has a smooth surface, but which can be satin finished, this being more preferable for writing purposes. Paper thus produced is said to resist even the direct influence ofjflame and remains uninjured even in* a white heat.
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https://paperspast.natlib.govt.nz/newspapers/MH18960416.2.13
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Manawatu Herald, 16 April 1896, Page 2
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159Fire-proof Paper. Manawatu Herald, 16 April 1896, Page 2
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