What is the method of making venous specimens?

Preparation materials: leaves, edible alkali, toothbrush.

The method of making leaf bookmarks is shown in the following figure:

1, prepare some leaves.

2. Prepare a packet of edible alkali.

3. Put the leaves in the pot.

4. Pour the edible alkali into the pot.

5. Add water to the pot for barbecue.

6. Turn off the fire and take out the leaves in the pot after they change color.

7. Take the leaves out of the pot and brush them repeatedly with a soft brush. The intensity should be light.

8. Brush out the veins and dry them.

9. After drying, the bookmark of the leaves is ready.