You can repair it a little bit by putting a blanket on the peeled layer and iron over it slowly again and again until the heat makes the plastic layer stick back to the printed paper layer.
The plastic sheet is peeling off my book cover.
4 years ago it s a protective cover that stops the paper from fraying similar to the waxing on magazine covers.
It also puts off a gas that creates a chemical reaction when bonded to the paper.
You might notice spots where the color comes off if the book is rubbed against something.
You can take it off but it will make your book more susceptible to tears and general wearing.
Leave a 1 inch 2 5 cm space between the book and the end of the paper so you have room to wrap the plastic over the inside cover.
The pieces that are peeled off can then easily be removed by tearing them off leaving only a tough flexible film on top of the exposed paper.
Researchers at the national archives found that when heat removed the laminate a residual amount of adhesive remained on the paper.
Place the book on the paper with the text block 1 inch 2 5 cm from the end.
With the cover of your book laying flat against the left side of the paper peel back the right half of the paper from the laminate film.
The text block is the opposite end from the spine.
Arrange this edge parallel with the end of the paper.