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Diatomite, épurée, 250 g
Chlorure de cobalt-II-6-hydrate, 25 g
Chlorure de cobalt-II-6-hydrate, 100 g
Cobalt(II)-nitrat, 50 g
Cobalt(II)-nitrat, 100 g
COBALT(III)-OXIDE, 5G
Cobalt(III)-oxid, 25 g
Crystal violet, 25 g
Copper, sheets, 50 g