Experimental equipment used in chemical experiments to add powdered solids to test tubes that are not filled with liquid.
Production method: Take a rectangular piece of paper with a width of about 1cm and place the long sides of the paper. Fold it in half and unfold it to form a groove. The width can be adjusted according to the test tube model.
How to use: Use a medicine spoon to take a small amount of powdered solid medicine and place it on one end of the paper groove; place the dry test tube horizontally Place, extend the end of the paper tank with the medicine horizontally into the bottom of the test tube, stand the test tube upright, and take out the paper tank. Note: Do not take solids that are strongly corrosive or react with paper.