It is generally believed that waste old TV picture tubes (cathode ray tube) is a waste containing toxic substances  But a new study shows that this waste may be useful  Researchers placed chips of cathode ray tube glass between a cobalt radiation source with a radioactivity of 800 trillion Becquerels and an instrument for measuring radiation dose to determine its ability to shield radiation  The analysis results show that even if the chips of cathode ray tube glass are not tested Any processing, 55 cm thick glass debris can reduce the radiation dose to the original 1%, which is equivalent to the shielding capacity of about 9 cm thick lead plate, and lead is considered to be the material with the strongest ability to absorb and shield nuclear radiation
If the glass debris is mixed with the glass powder produced by crushing cathode ray tubes, the above effect can be achieved by about 40 cm thick
The view that it contains toxic substances has been questioned