Rice starch

Rice starch at 200x transmitted light

Description

Rice starch at 200x polarized light

Polysaccharide granules that compose about 70% of the rice kernel. Rice starch is separated from the gluten and fibrous particles by sieving then wash flotation. Rice starch is composed of 17% Amylose. Rice starch paste forms a weaker, but more stable, film than wheat starch paste.

Synonyms and Related Terms

rice glue; rice gum; rice powder

Risks

Susceptible to biodeterioration. Dried films become brittle with age.

Physical and Chemical Properties

• Fine, angular granules.
• Granule size = 3 - 8 micrometers.
• Gelatinization temperature = 68 - 78 C
• Reacts with a iodine/potassium iodide solution to give a positive purple color

Resources and Citations

• G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 766

• Rosalie Rosso King, Textile Identification, Conservation, and Preservation, Noyes Publications, Park Ridge, NJ, 1985

• Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982

• Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989

• Encyclopedia Britannica, http://www.britannica.com Comment: "cereal processing" [Accessed April 8, 2002].

• Art and Architecture Thesaurus Online, https://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000