Alternate Names: SHMP, Calgon
Materials that are added to bodies and glazes to impart physical working properties and usually burn away during firing.
Generic materials are those with no brand name. Normally they are theoretical, the chemistry portrays what a specimen would be if it had no contamination. Generic materials are helpful in educational situations where students need to study material theory (later they graduate to dealing with real world materials). They are also helpful where the chemistry of an actual material is not known. Often the accuracy of calculations is sufficient using generic materials.
Sodium Hexametaphosphate at Wikipedia