How to describe a previously crumpled but now 'flat' sheet of paper that has been crumpled before?

How do you describe the state of a now-flat sheet of paper that has previously been crumpled?

Should I just use crumpled as in, "The paper is crumpled" (even though it's not in a crumpled ball shape: it's flat with lines on it that have formed from it's being crumpled previously)?

Solution 1:

I think you are looking for wrinkled:

wrin·kle, noun
1. a small furrow or crease in the skin, especially of the face, as from aging or frowning.
2. a temporary slight ridge or furrow on a surface, due to contraction, folding, crushing, or the like.

The second meaning above describes uncrumpled paper perfectly:

I flattened the page out but it was still wrinkled.

Solution 2:

Uncrumpled, participle of uncrumple (“To return something which has been crumpled, closer to its original state”), may be a good choice. Wiktionary example sentences include:

I took the wadded up letter from the trash and carefully uncrumpled it.
As the newspaper uncrumpled, the picture on the frontpage become recognizable.