I found that Epson T673 is a series of six-color ink bottles that can be used for producing high-quality, glossy photos 1. The black ink bottle in this series is compatible with Epson L800/L850/L1800/L805 printers and has a duty cycle of up to 3000 pages 2. The ink bottle contains 70ml of ink 3. Unfortunately, I could not find any information on the specific details of the black ink in this series. Is there anything else I can help you with?