In order to improve accuracy of TL authentication test for porcelain
a method of measurement of annual dose using ultrathin (CaSO 4:Tm) dosage layer on porcelain was studied. The TLD was placed on the part of porcelain without glaze.A comparison of measurement of annual dose for surface TLD
inside TLD and alpha counting on porcelain was made. The results show that this technique is suitable for measuring annual dose and improving accuracy of TL authentication test for both porcelain and pottery.