Bookmarks on cardboard: prepare some colored cardboard, draw your favorite graphics, and write famous sayings and aphorisms on them. Cut out the pattern, punch a hole with a punching machine, and mark it with ribbons.
2. Select the blade. Choose leaves with thick veins. Generally evergreen woody plants are better. Such as osmanthus leaves, heather leaves, papaya leaves, eucalyptus branches and leaves, tea and so on. Choose leaves in late summer or autumn when they are fully mature and begin to age.
Boil leaves with lye. Configuration of lye: calculated by 1 liter of water, sodium carbonate (sodium bicarbonate) 70g, sodium hydroxide 50g (the above two drugs and chemicals are available in stores), or lime water is used instead of lye. Boil the prepared lye in an enamel cup or casserole, and then boil it in a proper amount of washed leaves. Gently stir the leaves with chopsticks to prevent overlapping and make them evenly heated. Cook for about 5 minutes. After the leaves turn black, take a leaf and put it in a plastic basin filled with clear water. Check the corrosion and easy peeling of mesophyll. If it is easy to separate, take all the leaves out and put them in a plastic basin filled with clear water, and then separate the mesophyll and veins one by one. Remove the mesophyll. Put the cooked leaves on the palm of your hand or a glass plate, gently rub them with the smooth part of the old toothbrush handle to wipe off the corroded mesophyll, then rinse them under the tap and continue rubbing until the mesophyll is completely removed. Bleached veins Bleaching the scrubbed veins in bleaching powder solution, taking them out, washing them with clear water, putting them into old books and newspapers, absorbing moisture, and taking them out as veins bookmarks. Dye, draw and write. Dye your favorite color with red and blue ink or other dyes, or draw and write on it, and finally tie it with silk thread.