A:AnswerI have never had the occasion to test whether the ink when printed is waterproof. However a few random drops of water don’t cause smearing. Because most of my printing is on plain 20# paper, I feel it’s prudent to avoid water as the paper itself is not waterproof.
A:AnswerYou need the 280 Pg Blk cartridge as well as the 281 Blk, 281 Cyan, 281 Magenta, and 281 Yellow cartridges. You can find these bundled together in Standard, XL and XXL packs.