The annual β dose makes up about 50% of the total annual dose for the quartz inclusion technique in TL dating of pottery. In order to determine accurately annual β dose
the thickness response (due to the build- up effect) of β dose in fragments must be studied. It was shown that when thickness of fragments is within 7mm the thickness response of β annual dose can be corrected by using the correction factors obtained from this experiment. The correction factors are also useful for all other β measurements.