As I understand it one black cartridge (usually the bigger one of the two) is used exclisively for text printing, the other black is used combined with the cyan, magenta and yellow to produce the range of tones and hues for colour printing.
This thread is now locked and can not be replied to.
Nintendo Switch review: Hands-on with the intuitive modular console and its disappointing games…
1995-2015: How technology has changed the world in 20 years
New Corel ParticleShop plugin now available: 11 new brushes & 6 new brush packs
Apple AirPods review: Apple's beautiful new Bluetooth headphones bring true intelligence to…
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.