| 摘要 |
Aqueous-based dye-depletion formulations such as bleaches, oxidising agents or reducing agents are thickened or viscosity-modified by the addition of a synthetic layered crystalline mixed metal hydroxide having cationic surface charges, especially of the formula LimDdT(OH)(m+2d+3+n.a)(A<n>)a.xH2O where m is zero to one, D is a divalent metal, d is from zero to 4, T is a trivalent metal, A represents at least one anion or negative-valence radical of valence n, where n is 1 or more, (m+2d+3+n.a) is equal to or more than 3, (m+d) is greater than zero, and xH2O represents excess waters of hydration. The dye-depletion formulations of the invention have highly beneficial gel-thinning and gel-setting properties which render them capable of being used in pattern-dying, pattern-bleaching, and the like. |
