| 摘要 |
A modelling clay set based on grain flour clay comprising two types of clay:- a range of clays containing pigments, which change colour in response to pH variation, and a range of clays containing acidic or alkaline pH regulating agents. Colour changes can be effected by kneading together amounts of at least any two clay species. Further colour changes are possible by mixing in an additional amount of:- either at least one of the clays containing a colouring agent, or at least one of the clays containing a pH regulating, or a mixture of both types of clay. Hence no colour change need be permanent or be restricted by principles relating to the mixing of primary colours, thereby increasing the fun to be had from playing with modelling clay. |
