Hahnemuhle - Lab Filration - Hardened Filter Papers

• Made of super-refined cotton linters and cellulose
• a-Cellulose content above 95%, therefore high stability and durability
• Acid-washed and rinsed with water
• Free of minerals and metallic ions, ideal for the detection of metallic ions
• Hardened by small quantities of nitrogen-containing resin, which does not introduce significant impurities into the filtrate
• High wet strength; easy to scrap off or wash off precipitates
• High resistance to aggressive chemical components, like sulphuric and nitric acids (up to 40% at 50° Celsius) and alkalis (up to 10% at 20° Celsius)
• For analytical applications, routine quantitative and /or gravimetric procedures

Grade 1505

• For coarse crystalline precipitates
• Determination of proteins
• Determination of fibres in foodstuffs
• Cement analysis
• Analysis in electroplating: baths of aluminium, chrome and copper

Grade 1506

• For fine crystalline precipitates
• Gravimetric determination of metals in acidic/alkaline solutions
• Analysis in electroplating: baths of aluminium, copper, nickel and tin

Grade 1507

• For very fine crystalline precipitates
• Gravimetric analysis of fine metals: barium and lead sulphate, nickel and tin sulphide, oxalate and calcium fluoride