Walnut shell

Description

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

Additional Information

N.Veloz, W.T.Chase, "Airbrasive Cleaning of Statuary & Other Structures" Technology & Conservation, 1/89, p.18-28.

Comparisons

Properties of Common Abrasives

Authority

• G.S.Brady, G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 857

• Marie Svoboda, Marie Svoboda, Conservation Survey Index, unpublished, 1997