The Canon CLI-36 colour twin pack contains two ink tanks, each of which contains three colours. Within each cartridge is all of the ink needed to generate perfect colour prints and will print up to 249 A4 pages. The reason these ink tanks can print so much is down to the quality of Canon’s Chromalife 100 ink. When you use genuine Canon ink in your printer along with high quality printing paper the results are not only crisper and clearer they will also last longer without fading and be less prone to fading. The matching black ink cartridges for the CLI-36 Colour is the PGI-35 black ink. You can buy the Canon PGI-35 black ink twin pack of cartridges online now to complete the set and ensure you have plenty of ink on-hand.