BS EN 71-4:2020 Safety of toys Part 4: Experimental sets for chemistry and related activities
BS EN 71-4:2020 pdf free.Safety of toys Part 4: Experimental sets for chemistry and related activities. The chemical substances, mixtures and indicators given in Table 1 and Table 2 may be supplied in chemistry sets or in a supplementary set for a chemistry set up to the amounts and concentrations specified in those tables. The quality of the chemicals used […]
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