2. Pour tea or dark plum water and dry it.
3. Brush a layer of diluted soy sauce water on the white paper, and pay attention not to be too thick, then dry it in the shade or dry it.
Squeeze into old books for two days, and then put them in humid air for two days, so they look old after drying.
5. Soak in weak acid liquid, and then dry in the shade. Soak or spray new paper several times with 1% ferric chloride solution. A week later, the color of the paper turned yellow. After a period of time, the color of the paper will turn slightly gray and look like old paper.
6. Release the weeds that are not too dry and smoke the white paper to make it look like old paper; But be careful not to burn or catch fire.
7. Cage steaming. Because a certain amount of whitening agent will be added in the papermaking process, steam heating will make the original whitening agent decompose and fail, and the paper will naturally turn yellow.
8. First, the new paper is irradiated with ultraviolet rays for 2-5 days, so that some fibers in the paper are destroyed, so that the new paper feels similar to the old paper, and then it is dyed with gamboge to become old paper.