Last time I attended my friend's son's full moon wine, I gave him a red egg, but how was the red egg made and what information was used to dye it? I don't think many young people know. When they were young, the old people organized these jobs, and the children just ate and never interfered with them, so that many young people can't inherit some old customs now.
When we held the full moon wine in our village, it was dyed with hematoxylin, a traditional Chinese medicine. This is non-toxic and relatively healthy and safe. First of all, we bought sappan in a Chinese medicine shop, which was very cheap, only one yuan and eighty cents. Now I can understand why Chinese medicine saves money, but Chinese medicine is buried, digressing and getting back to the topic. For eggs for dyeing, the old man said it was best to choose yellow eggs instead of white ones.
Sumu looks like ordinary sawdust, but it turns red when boiled in water. In the past, many natural pigments used sappan wood, but now people are lazy and use chemical pigments instead.
Finally, you can buy more sappan wood (it's cheap anyway, so buy more. It may be better if sappan wood is boiled in water. ) Add the boiled hematoxylin water first, and then put it into the basin for later use. Boil the eggs separately, and let them cool after cooking. Then put the boiled eggs into sapporo water one by one for coloring.