from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The cation Cu(NH3)42+ formed by adding ammonia to copper salts

from The Century Dictionary and Cyclopedia

  • n. In chem., the compound radical in certain salts obtained by the action of ammonia upon the ordinary salts of copper.


cupro- +‎ ammonium (Wiktionary)


  • "cuprammonium" solution dissolved some of the cellulose which reprecipitated during passage through the succeeding acid bath, filling the pores of the cloth enough to make it "water resistant" but not "water-proof".

    John B. Fenn - Autobiography

  • Cuprammonium rayon, also known as Bemberg or cupra rayon, is named after a step in its processing in which cellulose is dissolved in a cuprammonium hydroxide solution.


  • Viscose rayon, cuprammonium rayon, high wet-modulus rayon, and lyocell and their care … Acetate and triacetate and their care … Nylon and its care … Polyester and its care … Acrylic and modacrylic and their care … Spandex and its care … Polypropylene and its care … Microfibers … Blends … Caring for hydrophobic synthetic fibers


  • Fabrics made from cuprammonium rayon tend to be more resilient than viscose rayon—that is, they do not wrinkle so easily.


  • Nosing around outside I lifted a small flap on the cover of a large tank half full of cuprammonium solution.

    John B. Fenn - Autobiography

  • This can be accomplished by dissolving cellulose in cadoxen, cuprammonium, or strong acid and then reprecipitating and washing.

    3 Ethanol Production

  • [15] The recent failure of a French company founded for the exploitation of the cuprammonium process may be taken as showing that it presents very considerable technical difficulties.

    Researches on Cellulose 1895-1900

  • 'Lustra-cellulose' made from the solution of cellulose in cuprammonium.

    Researches on Cellulose 1895-1900

  • ~ -- The application of the solution of cellulose in cuprammonium to the production of a fine filament in continuous length, 'artificial silk,' has been very considerably studied and developed in the period 1897-1900, as evidenced by the series of patents of Fremery and Urban, Pauly, Bronnert, and others.

    Researches on Cellulose 1895-1900

  • Moreover, it entirely resists the actions of the special solvents of cellulose -- e.g. zinc chloride and cuprammonium.

    Researches on Cellulose 1895-1900

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