EBook readers foxing

I have the e-book reader in white. After delivery of the envelope I have tried this course immediately. The Reader fits well into the envelope and also the protection against mechanical attacks makes a good impression.
After a week I took the reader from the envelope and found these are foxing on over back to the velvety white plastic that Definitif coming from the shell, because the reader was not previously running and well packed in its original packaging without spot was ,
Too Bad ....