Dispersion stable curable compositions and method for making hollow shells using same

The present invention relates to curable compositions which include a pigment disbursed therein and a dispersion stabilizing additive which maintains the pigment in a disbursed form prior to cure. In particular, the curable compositions of the present invention are radiation curable compositions which have particular application for use in hollow shell molds, such as those employed to make hearing aids. A curable composition and method for making hollow shell molds, such as those employed to make hearing aids. The curable composition includes a (meth)acryl functionalized curable component, a cure system, a pigment composition, and a dispersion stabilizing additive. The pigment composition includes at least one pigment disbursed within the curable composition. The dispersion additive maintains the pigment in a disbursed form prior to cure. The dispersion additive includes an alkali metal cation and a reaction product.