Leaf vein bookmark making method: Leaf flesh will rot when it meets corrosive liquid. After heating, it will rot even faster. Leaf veins are tougher and less prone to corrosion. Therefore, you can make some leaves hard, leaf veins tough plant leaves made of leaf vein bookmarks. Tools and materials: beaker, tripod, asbestos net, alcohol lamp, matches, balance, old toothbrush, tweezers, watercolor paint, colored silk thread, sodium hydroxide, 3% hydrogen peroxide, cinnamon plant leaves. Production process: 1. Pour about 100 ml of water into a beaker, add 4 grams of sodium hydroxide to the water, rest the beaker on an asbestos net, heat with an alcohol lamp and boil the solution. 2. Submerge the plant leaves in the solution, continue to heat for about 15 minutes, stir gently with tweezers to separate the leaf flesh and corrode evenly. 3．When the leaves change color and the leaf flesh is crispy, remove the leaves with tweezers and place them in a glass filled with fresh water. 4．Remove the leaf blade from the water, put it on the glass, and gently brush the front and back of the leaf blade with an old toothbrush under running water to brush away the soft part of the leaf blade and reveal the white leaf veins. Immerse the leaf vein pieces in 3% hydrogen peroxide for 24 hours to turn them pure white, then remove the leaves and wash them in water to drain off the water droplets. 5．Place the leaf vein sheets in an old book or old newspaper and press them dry. 6. Take out the flattened leaf vein pieces, wait until the leaf veins are dry, use a brush to apply watercolor paint on both sides of the leaf veins, and then flatten them after a little drying. 7. Take out the leaf veins coated with paint piece, in its petiole tied a colorful silk thread, you get a delicate and beautiful leaf vein bookmarks. Description and extension: 1, the production of leaf vein bookmarks can be used in addition to cinnamon plant leaves, but also available coral plant leaves. 2, heating, the beaker must rest on the asbestos net, such as direct heating, the beaker due to uneven heat will cause broken. 3, the used liquid can be saved in the empty container for the next time, the general liquid can be recycled 4 to 5 times. 4, such as processing treatment of too many leaves, can be replaced by a large beaker, water and sodium hydroxide should be 100:8 for the liquid. Another practice: leaf vein bookmark is to choose the beautiful leaf shape of the leaves, after chemical treatment to remove the leaf flesh part, retaining the intact leaf veins, after dyeing made of a bookmark. The production of leaf vein bookmarks can be used as laid-off workers and rural affluent laborers a way to make money. Production method: 1, choose leaves. Select leaves with thick and dense veins. Generally to evergreen woody plants is good. Such as cinnamon leaves, heather leaves, papaya leaves, eucalyptus leaves, tea tree leaves and so on. Select the leaves in late summer or fall when the leaves are fully mature and begin to age. 2、Boil the leaves with lye. Configuration of lye: 1 liter of water, sodium carbonate (baking soda) 70 grams, 50 grams of sodium hydroxide (the above two drugs are available at the chemical store), can also be used instead of lime water lye, enamel cup or casserole dish will be equipped with lye to boil into the appropriate amount of washed leaves, boiling, and chopsticks gently rattling the leaves to prevent stacking of the leaves, so that it is uniformly heated. Boil for about 5 minutes, after the leaves turn black, fish out a leaf and put it into a plastic pot with water. Check the corrosion of the leaf flesh and easy to peel off the situation, such as easy to separate all the leaves can be fished out, put into a plastic pot with clean water, and then one by one for the separation of leaf flesh and leaf veins. 3. Remove the leaf flesh. Put the boiled leaves on the palm of your hand or on the glass plate, use the old toothbrush handle to gently rub the smooth in the leaf surface, the corroded leaf flesh can be wiped off, and then rinse under the faucet, continue to rub until the leaf flesh is all removed. 4, bleaching leaf veins. Brush the clean leaf veins in the bleaching powder solution bleached and fished out, rinsed with water and clamped in the old books and newspapers, remove the water after drying, you can become a leaf vein bookmarks use. 5, coloring, drawing, writing. With red and blue ink or other dye dye into your favorite color, you can also draw, write on it, and finally tied on the silk thread is complete.