Walnut shell

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A powder made from ground Walnut shell refuse. Walnut shell flour contains Cellulose with Lignin (28%), furfural (5%), pentosans (9%), methyl hydroxylamine (6%) and sugar/starch (2.5%) (Brady 1971). It is used as a filler in plastics and adhesives. Walnut shells have also been used as a soft Abrasive for air pressure cleaning of outdoor sculpture (Veloz and Chase 1989).

Synonyms and Related Terms

walnut husks


Properties of Common Abrasives

Resources and Citations

  • N.Veloz, W.T.Chase, "Airbrasive Cleaning of Statuary & Other Structures" Technology & Conservation, 1/89, p.18-28.
  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 857
  • Marie Svoboda, Conservation Survey Index, unpublished, 1997