Review on High-Yield Replacement Toner Cartridge for Brother Laser Printer – DIGITONER Compatible TN580 TN650 TN550 TN620 Black [1 Pack] by John Beltran

Bought for a printer in class. The first few weeks the seal was terrible! Lines and markers on everything I've typed. I had to throw away everything I typed for the first 2 or 3 weeks because it was so bad. But after about a month the print started to look more normal, with light smudges on the sides and eventually no smudges. I wouldn't buy this again.