These 185 mm diameter very slow filtering, purple dot filter paper discs are used for quantitative & gravimetric analyses as well as for pressure or vacuum filtration.

They are  made out of 100 % cotton linters with an a-cellulose content of > 98 % and are acid-washed to make the papers ashless and achieve high purity.

These 185 mm diameter very slow filtering, purple dot filter paper discs are used for quantitative & gravimetric analyses as well as for pressure or vacuum filtration.

They are  made out of 100 % cotton linters with an a-cellulose content of > 98 % and are acid-washed to make the papers ashless and achieve high purity.