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  1. Mar 2025
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    1. chrisaldrich 03 Mar 2025
      Glycerine, castor oil, and mineral oil are suitable;€.8. 15 per cent arachis (ground nut) oil, 15 per cent sperm oil, 70 per cent mineraloil.
      typewriter ribbon manufacture glycerine castor oil mineral oils arachis oil sperm oil
    2. chrisaldrich 03 Mar 2025
      The pigmentisfrequentlymadeintoapastewithpetroleumjellyoraheavymineraloil,andanaturalorsyntheticwax;thesolublecolour,dissolvedinoleicacid,being thenmixedwiththepasteandthewholethengroundthoroughlyon«three-rollmill.
      typewriter ribbon inks petroleum jelly mineral oils oleic acid

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