HP Printer Refill Ink Suitable for CISS and all HP Cartridges. The cartridge consists of a sponge to stock ink inside it and while printing this ink is sprayed on to the paper as fine droplets using nozzles. A color cartridge consists of 3 chambers to store Cyan, Magenta and Yellow inks in it. These 3 colours are able to produce all colours in print output. Black cartridge consists of a single chamber for storing black ink. Once exhausted usually people throws the cartridge away and buys a new one spending Rs 450 - Rs 1500 per cartridge. Those can yield a page varying from 100 - 250 only. This will cost around Rs. 5 and above per printout.. To reduce the cost, and increase efficiency you just need to know basics of refilling. Refilling is an easy procedure to reuse the same cartridge. It's the process filling ink again in the sponge of cartridge. Printout can be obtained for 20 paise for Colour and 10 paisa for black per page. If simple text, then only just 7 or 8 paisa only per page. This Refill Ink Kit consists of 300ml Ink, 5ml Syringe, Instruction Manual. The ink is high quality DYE ink.