Folding Filter Paper Chemistry

Most filter papers are made on small paper machines for laboratory filters the machines may be as small as 50 cm width.

Folding filter paper chemistry.

The filter papers may also be treated. The paper is often crêped to improve porosity. Folding a filter paper cone so that it beds well down into the funnel creating a good seal when wet makes for an efficient filtration step. Very often users will fold the paper cone with the same 60 angle.

Fold it in half as shown on the right. The 60 filter paper funnel. Open the filter paper as shown on the right and place it in the funnel. Then it is folded again and creased to produce a quarter circle.

From left to right and top to bottom one first folds the round piece of filter paper in half and creases it. Many conical filter funnels have an angle of about 60. Now fold it again as shown on the right.