Quantitative filter papers, wet-strengthened, grade 1115, circles
The wet-strengthened filter papers exhibit a very high degree of mechanical stability. They are resistant against acidic and alkaline solutions and are suitable for pressure and vacuum filtration. They are made of 100 % cotton linters. For maximum purity the papers are acid-washed and cleaned with demineralized water. Ash content is 0.007 %.
Grade 1115, medium to slow filtering, particle retention 5-8 µm, filtration speed 50 s according to DIN 53137, basis weight 84 g/m², thickness 0.16 mm, wet strengthened
For fine precipitates (magnesium phosphate, ammonium phosphate, calcium oxalate, coarser flaked forms of barium sulphate). Especially high mechanical strength and resistance to acids and alkalis.