Ref. 912 Universal test paper Litmus paper : General control of acid or alkaline solutions - Litmus Blue Blue Red Red colour in acid medium - Neutral Litmus Purple Blue/Red Blue colour in alkaline medium and red colour in acid medium - Litmus Red Red Blue Blue colour in alkaline medium Phenolphtalein paper : Brilliant yellow paper : Neutralisation control Detection of alcalin concentration White Red Yellow Red Red congo paper : Nitrazine yellow paper : Neutralisation control Red Blue Yellow Grey-blue/Blue Test paper for qualitative detection Lead acetate paper : White paper turn to brown/black colour with sufhydric acid (H2S) White Brown/Black Potassium iodid starched paper : Detection of nitrites and free chlorine White Blue/Purple Curcuma paper : Detection of boric acids Yellow Red Présentation : - roll of 5 m in twist cap dispenser - booklet of 100 strips 75 x 8 mm - refill pack of 3 rolls
Ref. 912
Universal test paper
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