I purchased a couple rolls from a seller called (Eshop2018) and they looked black and then printed a light blue color... The seller sent me a response threw Ebay knowing about the problem and told me that he had no other customers complaining of the issue.
I am returning ALL rolls of material since the quality was so bad on the rolls of black that they had bubbles and turned a light blue color. Below is a picture i took and sent to the seller and was offered a whole $5.00 off each roll with no option of returning the bad rolls...
The brand i have been having good luck with and will stick with from Ebay is called (Sain Smart) the only downfall is the cardboard rolls.