This series of extremely high purity, acid washed filter paper is designed for use in analytical and gravimetric analysis. The quantitative grades are manufactured from top quality cotton linters using ultra pure water and further treat with acid to remove any remaining organic and inorganic impurities.

Grades 351, 352 and 354 are high purity filter papers suitable for routine quantitative gravimetric techniques and in the preparation of samples for use in the analysis involving instrumental techniques.

Grades 371 and 373 are specially treated hardened ashless papers ideal for critical quantitative analysis techniques requiring increased we strength and handling capacity. They have a tough, smooth surface free from loose fibres and ideal for collecting wet precipitates.

Each grade is widely used because of their high chemical resistance to strong acids and alkali.