oh , Seema chka . Thank you ! These tapes , as once upon a time it was at the post office ?
I also thought about such as Scotch tape over time can stain or peel off ..
I " foot" did not come across , (I wonder how look like? ) Only scotch ( one half to the substrate , the other to the mat inside). But these were not pictures of museum and bought because of frames.
Isinglass gelatin=? 4%for example?
I intuitively long ago that most gentle gelatin glue and paper, and canvases. ( I have them on canvas , glue krton pleased to take your hands )
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