How to repair old New Year pictures?

Some defective New Year pictures should also be dealt with according to the situation. For yellow spots on New Year pictures, you can use a spoonful of salt to dissolve them in heated milk. After the milk is cooled, completely soak the collection in the milk 1~2 hours, then take it out, gently wipe it with a soft cloth, rinse it with clear water, and dry it to remove the yellow spots. When painting with blue ink, bleach and baking soda can be dissolved in water in the same proportion, and then the New Year pictures are immersed in water, and the blue ink can be removed after a while. When the New Year pictures are stained with oil stains, cotton balls can be dipped in some gasoline or alcohol and gently wiped to remove them. New Year pictures stained with wax marks can be placed between two pieces of absorbent paper and ironed with an iron to remove wax marks. For pasting thin New Year pictures, you can apply glue to the exposed part, then paste a piece of paper with the same size and roll it flat with a round object.