The recyclable glass was developed by x-ray irradiation induced coloration and decoloration by heating. The induced optical absorptions at 620 and 440 nm were attributed to the formation of nonbridging oxygen hole centres. After doping 0.02 wt% silver ions in the glass or doping silver by the ion exchange process, its coloration properties were greatly improved. The silver ions in glass trap electrons increasing the effect of irradiation; then the nonbridging oxygen hole centres were stabilised. After doping 0.02 wt% silver into the base glass, the absorptions at 620 and 440 nm after keeping for 10 months increased from 1.82 to 2.13 cm-1, and from 4.3 to 9.1 cm-1 respectively. Coloration was greatly improved after doping silver ions in the glass.
