[en] It was found that thermoluminescence (TL) in zircons fades anomalously. Several factors that could affect the rate of anomalous fading were also studies. It was determined that grain size, dose rate and total dose received by the sample did not have any significant effect on the rate of anomalous fading. However annealing of the sample (approx 900deg C for 1 hr in air) or its storage at different temperature (well below the peak temperature) seems to affect, at least, the fast component part of the anomalous fading TL. This component can also be removed by infra-red light