How to save plasticine by hand
In places with high humidity in the south or coastal areas, put the finished plasticine into the microwave oven and heat it for 10 second with medium fire, so that the plasticine products will become drier and will not fade or soften even if the surrounding humidity is high. In the north or arid areas, the humidity is low, so we should often pour some water into the product to make it absorb a little water without drying.
Handmade with plasticine has preservation problems. I suggest using light clay, which is better than plasticine. Light clay is pure white. When using color, just squeeze a little pigment on it and rub it, so that the color can be evenly blended into the light clay. It is very convenient to use, and it will not fade and crack, and it is easy to store.