Thermal activation characteristic (TAC) is an important factor in thermoluminescence dating using the pre-dose technique.A correct dating of the Tang Sancai depends to a large extent on the TAC.The experimental re- sults show that the thermal activation temperatures (TAT) of the Tang Sancai from the Luoyang are between 500℃and 650℃
with TAT of most samples being at 550℃or 650℃.This is lower than the typical value found in porce- lain.