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.

Then it is folded again and creased to produce a quarter circle. Very often users will fold the paper cone with the same 60 angle. The filter papers may also be treated. Now fold it again as shown on the right.

From left to right and top to bottom one first folds the round piece of filter paper in half and creases it. The paper is often crêped to improve porosity. Many conical filter funnels have an angle of about 60. 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.

Obtain a round piece of filter paper. Folding a piece of filter paper for insertion into a conical filter consists of a simple set of steps shown here in the six photographs below. Fold it in half as shown on the right.