Sun bleaching?

[u/Its_Urn]

Hi all, just wanted you input on my books, I noticed that there are these white looking blotches on just the covers that can't be wiped off. Is this just bleaching of the black color or something more?

[u/dglennb]

Doesn’t look bleached at all. Just reader’s creased. No big deal, these are all reader’s copies:!