Justus Claproth

Justus Claproth. Engraving by Heinrich Schwenterley (1792)

Justus Claproth (born December 28, 1728 in Kassel ; † February 20, 1805 in Göttingen ) was a German lawyer and is considered the inventor of recycled paper .

Life

Claproth received his doctorate in Göttingen in 1754 and worked there as a professor and manufacturing judge from 1759, later he received the title of royal British and electoral Brunswick-Lüneburg court counselor.

In 1774 he published a pamphlet entitled An Invention of Making New Paper from Printed Paper . In it Claproth reports on attempts that he had made together with the papermaker Johann Engelhard Schmid (1736–1811) from Klein Lengden near Göttingen in his mill to make new writing paper from printed waste paper. For this purpose, the printing ink was washed out with turpentine oil and washing earth. With this, Claproth introduced the blackening or deinking process into paper technology, even if this was not to become established until centuries later.

Publications

• Invention to make new paper out of printed paper. Goettingen 1774.
  • An invention to make new paper out of printed paper . Facsimile of the original from 1774. Edited with afterword. by Hans H. Bockwitz . German Museum of Books and Writing, Leipzig 1948, DNB 450795179 .
  • An invention of making new paper out of printed paper and completely washing out the printing ink . Facsimile of the edition: Barmeier, Göttingen 1774. Basler Papiermühle, Basel 1986, DNB 210493259 .
• D. Justus Claproths Königl. Great British and Electoral Brunswick-Lüneburg Court Councilor, full teacher of the rights and assessor of the law faculty, at the Georg Augustus University, member of the Royal Agriculture Society of Cell, of the Royal German Society of Göttingen, also of the High Princely Hessen-Cassellische Gesellschaft des Ackerbaues und der Künste Introduction to all summary processes for the use of practical lectures. 2nd, increased edition. In the publishing house of the widow Vandenhoeck , Göttingen 1785, IX, (46)

literature

• [An invention of making new paper out of printed paper and completely washing out the printing ink]. Justus Claproth's 1774 treatise on the use of waste in paper manufacture. On the occasion of its 50th anniversary, new ed. / Afterword: Hans H. Bockwitz. - Hagen-Kabel: Papierfabrik Kabel A.-G., 1947, 34 pp.
• Justus Claproth's 1774 treatise on the use of waste for paper production (reprint). Hagen-Kabel, Papierfabrik Kabel AG, 1947, 34 pages (Gothic script)
• Förderverein Historische Spinnerei Gartetal (Ed.): The Invention of Paper Recycling. On the role of the former Klein Lengden paper mill in raw material recovery. Goettingen 1996
• Toni Schulte:  Claproth, Justus. In: New German Biography (NDB). Volume 3, Duncker & Humblot, Berlin 1957, ISBN 3-428-00184-2 , p. 260 f. ( Digitized version ).
• Theodor Muther:  Claproth, Justus . In: Allgemeine Deutsche Biographie (ADB). Volume 4, Duncker & Humblot, Leipzig 1876, p. 274 f.

Web links

• Literature by and about Justus Claproth in the catalog of the German National Library