Cure depth for photopolymerization of ceramic suspensions

The cure depth of a series of photopolymerizable SiO 2 and Al 2O 3 ceramic suspensions was measured as a function of energy dose to determine the sensitivity parameter D p and its dependence on ceramic volume fraction, type and concentration of photoinitiator and inert dye. As predicted by an Absorption Model for D p, 1/ D p is a linear function of photoinitiator concentration and dye concentration. The molar extinction coefficients derived from the cure depth measurements using an Absorption Model were compared with coefficients determined via spectrophotometry.