Our firm is the leading manufacturer of Blaine's Filter Paper. The product is used in cement, ceramic and refractory industries for testing particle size of materials by measuring surface area using Blaine's apparatus....
Blue litmus paper Blue , pH 8-5 . Changed color from blue to red in acid. Measuring length x width , 65 mm x 10 mm . Each book is 10 pieces. Supplied in boxes, 10 books box .....