In order to improve accuracy of TL authentication test for porcelain
a method of direct measurement of annual β dose using ultrathin TLD (CaSO4.Tm) on porcelain was studied. Since the TLD was placed into a hole left after sampling for the TL measurement
the method will not cause any new damage to the studied object. The results show that the technique is suitable for measuring annual β dose and improving accuracy of TL authentication test for both porcelain and pottery.