I just print to my printer CANON PRO 100, 240 sheets of text and illustrations B / W to form the Mass booklet that will be distributed at the wedding of my son. Paper is fine enough, but "door" well enough black ink, although with said setting "standard print quality" and "plain paper", the front of the sheet of the back reveals a watermark printing. But the product still meets the expected need. I did not find 90 grams in that color. Note: No problem with the packaging of the ream and no alteration of leaves due to transportation. I am satisfied.