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 on the material of exposure to sunlight. The material they used, CR-39 ^TM, has the chemical compostion 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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© 2005-2009 Track Analysis Systems Ltd.  All rights reserved.  TASL, TaslImage, Tastrak, Radosure and the TASL marks are owned by Track Analysis Systems Ltd and may be registered.  CR-39 ^TM is a trademark of PPG industries.