About TASL

In 1978, while investigating the properties of CR-39 TM plastic, the radiation research group at Bristol University taped a sample of the plastic from a spectacle lens to a window pane to observe the effect of sunlight on the material. The material they used, CR-39 TM*, has the chemical composition Poly Allyl Diglycol Carbonate (PADC). When the sample was etched, it was found to have recorded the tracks of alpha-particles due to traces of uranium and thorium in the glass. The ease with which the small number of tracks could be recognised and measured showed PADC to be an ideal material for low-level counting and, to pursue such research, the Track Analysis Group was formed.

To obtain high-quality material formulated specifically for track detection, the group experimented in producing its own PADC plastic at Bristol. To exploit the sales enquiries which followed their success, TASL was formed in 1983, and has now been producing TASTRAK, its brand name for PADC manufactured specifically for nuclear track detection, routinely since 1985.

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*CR-39 TM is a trademark of PPG industries.