A dental porcelain having the following composition:made by blending powdered first-fire frit with pacifiers, heating this first-fire frit to 2000.degree. F., and rapidly cooling the charge.
This invention relates to a new water-soluble, tetraphenyl substituted pyridinium salt compound and to a novel process of producing it. This compound finds use as a selective analytical reagent for certain large anions of low charge density.
