Specific steps are as follows:
1. Fold the filter paper in half, two consecutive times, and stack it into a 90° center angle shape.
2. Put the stacked filter paper into three layers on one side and one layer on the other side to form a plastic funnels wholesale.
3. Put the funnel-shaped filter paper into the funnel, the filter paper edge is lower than the funnel side, pour some water into the funnel mouth, so that the wet filter paper is in close contact with the inner wall of the funnel, and then pour off the remaining clean water for use.

4. Place the funnel with the filter paper on the funnel holder for filtering (such as the ring of the iron stand), place the beaker or test tube that receives the filtrate under the funnel neck, and put the tip of the funnel neck against the wall of the receiving container. Prevent liquid splashes.
5. When pouring the liquid to be filtered into the funnel, hold the beaker containing the liquid on the right and the glass rod on the left. The lower end of the glass rod is close to the three layers of filter paper. The beaker cup mouth is close to the glass rod. The filtered liquid flows out along the cup mouth and then along the glass. The rod flows into the funnel. Note that the level of the liquid flowing into the funnel cannot exceed the height of the filter paper.
6. When the liquid flows down the neck of the funnel through the filter paper, it is necessary to check whether the liquid flows down the wall of the cup and is poured into the bottom of the cup. If not, you should move the beaker or rotate the funnel so that the tip of the funnel is firmly attached to the wall of the beaker, so that the liquid can flow down the wall of the beaker.