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This liquid is non-toxic liquid paraffin containing a UV sensitive photochromic dye. Indoors it appears as a clear liquid but when exposed to natural light it immediately becomes coloured. This colour increases in intensity when exposed to direct sunlight. The colour change is reversible, although it takes about 60 seconds for the liquid to become clear again.
*PLEASE NOTE WE ONLY SUPPLY CHEMICALS TO EDUCATIONAL ESTABLISHMENTS *
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