Mesophyll will rot when it meets corrosive liquid. It will rot faster when heated. Veins are tough and not easy to corrode. So some leaves with hard leaves and tough veins can be made into veins bookmarks.

Tool materials: beaker, tripod, asbestos net, alcohol lamp, match, balance, old toothbrush, tweezers, watercolor pigment, colored silk thread, sodium hydroxide, 3% hydrogen peroxide and osmanthus leaves.

Production process:

1. Pour about 90 ml of water into a beaker, add 10g of sodium hydroxide to the water, put the beaker on an asbestos net, heat it with an alcohol lamp, and boil the solution.

2. Immerse the leaves in the solution, continue to heat for about 15 minutes, and gently stir with tweezers to separate the mesophyll and corrode evenly.

3. When the leaves change color and the mesophyll is brittle, take out the leaves with tweezers and put them in a glass filled with clear water.

4. Take the leaves out of the clear water and put them on the glass. Gently brush the front and back of the leaves with an old toothbrush in running water to brush off the soft parts of the leaves, revealing white veins. Soak the leaves in 3% hydrogen peroxide for 24 hours to make them pure white, then take out the leaves, wash them with clear water and drain the water droplets.

5. Put the vein in an old book or newspaper and press it dry.

6. Take out the flattened vein piece, and when the vein is dry, apply watercolor paint on both sides of the vein with a brush, and flatten it after it is slightly dry.

7. Take out the vein slice coated with pigment and tie a colored silk thread on its petiole to get a delicate and beautiful veins bookmarks.

Description and extension:

1. In addition to osmanthus leaves, veins bookmarks can also be made of coral, maple, mulberry, linden, poplar and hazel leaves.

2. When heating, the beaker must be placed on the asbestos net. If heated directly, the beaker will break due to uneven heating.

3. The used liquid medicine can be stored in an empty container for next use. General liquid medicine can be recycled for 4-5 times.

4. If there are too many processed leaves, you can change to a big beaker, and the ratio of water to sodium hydroxide should be 10%.