Just use waste newspaper as the gasket between the picture and the border, there is not so much stress.
Large-scale China paintings and calligraphy works generally don't use paper, and plywood will have a better effect. This can be purchased directly from the place where the frames are sold.
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..... Well, I admit that I was defeated by you. What do you mean by paper jam? ....
Calligraphy of Chinese painting and mounting of photos are two different things. What does paper jam mean? Lining paper?
You must use lining to install. What are you talking about?
Upstairs, you're not talking about the paper in the picture frame behind the painting ... that thing (can it be counted as a thing? ), I use plywood instead, paper loves to deform. ...