Cobalt chloride paper

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Contributed by SITI SUYATI BINTE SAMRI and LENA LIM YUXIA

Current situation:
cobalt chloride paper is purchase from supplier yearly or when stock runs out


Improvement:
The sec 4 used cobalt chloride solution for their practical. The used cobalt chloride solution is then used to prepared our own cobalt chloride paper. By recycling the cobalt chloride solution, the school saved on the cost of disposal as cobalt chloride is toxic to environment and also on purchase.The cost of 1 box of cobalt chloride paper is $78




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