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Expired
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Hermann Breitner
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Individual
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Individual
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Publication of GB190708811ApublicationCriticalpatent/GB190708811A/en
8811. Breitner, H. April 16. Copying documents.-A hektograph composition is formed of kaolin and vinzentin or white Italian earth ground together to a fine powder and mixed with glycerine. A small proportion of hyposulphite of soda is preferably added, and powdered steatitemay be used instead of vinzentin earth (aluminium oxide). The glycerine is preferably added while boiling hot to the finely-powdered other ingredients, and the whole well stirred.
GB190708811D1907-04-161907-04-16Improvements in or relating to Hectographs or the like.
ExpiredGB190708811A
(en)