https://en.wikipedia.org/wiki/Ukiyo-e

基本上都是用20世紀初期前後,色彩保存比較好的作品進行訓練

但也有可能有用到仿製的............是說,這本來就是印刷品

Basically, the training is done with works from around the beginning of the 20th century, where the colours are well preserved.

However, there may be some imitations of copy works. ............basicly this is a print artstyle ...