PCT No. PCT/NL96/00091 Sec. 371 Date Sep. 5, 1997 Sec. 102(e) Date Sep. 5, 1997 PCT Filed Feb. 23, 1996 PCT Pub. No. WO96/25916 PCT Pub. Date Aug. 29, 1996The present invention relates to a method for preparing a preparation for bleaching teeth or for treating skin complaints and mucous membrane disorders, in which method at least the following are combined: (a) a gel or paste in which a component (i) is present, component (i) being composed of at least a cation An+ and an anion OmX-； where A is a metal from Group 1 or 2 of the periodic system, n=1 or 2, X is a halogen atom and m=1-4, and (b) a gel or paste in which a component (ii) is present, component (ii) being composed of at least a cation An+ and an anion [BpOq]r-, where A is a metal from Group 1 or 2 of the periodic system, p=1-4, q=1-8 and r=1-3.
