Oil test papers, for speedy detection of oil in water, 100 unit(s)Oil test papers, for speedy detection of oil in water For rapidly detecting the presence of oil in water and or soil. When the pale blue paper comes into contact with hydrocarbons, specifically gasoline, fuel oil, lubricating oil, etc., it turns a dark blue colour. Technical specifications: Substance Colour reaction can be seen immediately (mg l water) Colour reaction can be seen clearly Petroleum ether (Kp. 4080 C) 250 400 Carburettor fuel (Super) 10