Abstract
Examination was made of the effects of size and shape of the particles of four iron oxides, α-FeOOH, β-FeOOH, γ-FeOOH and α-Fe2O3, on the soiling of and their removal from a textile fabric. Nylon taffeta was soiled by an aqueous dispersion of iron oxide particles. The relationship between reflectance of the soiled fabric and particle content was determined. By application of this relationship in conjunction with Rees's equation, cover and association data on the particles on the fabric obtained.γ-FeOOH which is small in size and thin plate has a high degree of coverage and easy to associate. β-FeOOH which is large in size and rectangular lod has a low degree of coverage and hard to associate. α-Fe2O3 which is small in size and octahedron has a high degree of coverage and hard to associate. α-FeOOH which is large in size and needle has a low degree of coverage and easier to associate than the rectangular lod and the octahedron particles. The removal of γ-FeOOH and especially α-FeOOH was more difficult than in the case of α-Fe2O3 or β-FeOOH.It follows from the present results coverage depends on particle size, association depends on particle shape, and removal depends on both size and shape of particle.
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