The photodegradation characteristics of polymer ceramic PSP (PC-PSP) and TLC-PSP were investigated. In the present experiment, a mixture of fluoropolymer powder (PTFE) and silicone resin was used as the polymeric ceramic of PC-PSP, and Ru(dpp)3 was used as the PSP dye. The PC-PSP was less susceptible to photodegradation than the TLC-PSP. This can be explained by the effect of PTFE and polymer resin. When we apply a polymer resin to the TLC plate, we could improve photodeterioration of that. The experimental results showed that the present PC-PSP and the TLC coated with polymer resin applied to polymer resin could suppress the photodegradation characteristics without losing the pressure sensitivity.