FILTECH Quantitative filter papers are produced from extremely high purity, acid washed paper designed for use in analytical applications and gravimetric analyses.
These quantitative grades are manufactured from 100% high quality cotton fibres using ultra pure, reverse osmosis water. A final acid treatment removes any remaining organic or inorganic impurities. Quantitative grades have an ash content of 0.007%, and in the hardened form 0.006%.
Specially treated high purity, hardened ashless papers are available for applications requiring increased wet strength and handling capacity. These hardened grades have a tough, smooth surface free of loose fibres that is ideal for collecting wet precipitates and are generally used because of their high chemical resistance to acid and alkali.