Before copying calligraphy and painting, the painting core should be flattened, and there should be no creases or folds to keep the work flat.
The work is full of creases and folds, and the picture is very uneven. In this case, copying calligraphy and painting is not recommended. Needless to say, if you scan forcibly, the folds and creases on the screen will be scanned clearly, and even if you adjust the picture by software, the copy effect is not good.
Generally speaking, the reproduction effect of calligraphy and painting works will be better after being supported or mounted, because the painting core becomes thick and flat after being supported, so the scanned painting will be better.