A dissolving strip for tooth whitening the strip having at least a first toothcontacting layer and a second outer layer. The first tooth contacting layerhas a solid tooth whitening active in an amount which reacts within apredetermined time when placed on a tooth. The second outer layer hasa blend of polymers having different molecular weights the blend ofpolymers being selected to dissolve after the predetermined time haselapsed. The outer layer contains the tooth whitening active on said toothuntil the active is substantially used up. A method of forming a dissolvingtooth whitening strip is also provided, in which the outer layer is formed ona backing layer followed by the inner layer being formed on the outerlayer.
