How to print the cover of an eBook for binding?
Finally I find some information. In this YouTube video, the  paper they're printing cover on is 28lb bond and then they're single-side laminating each cover with 1.2mil gloss lamination. &quot;Thicker sheets are harder to fold and manipulate so a thinner sheet and lamination are ideal for these type of covers.&quot;
The main hard cover they are using is a pre-prepared hard cover that is itself one-side sticky and need not to any adhesive material.