1.Will compatible cartridges damage my printer?
Don't worry, the manufacturer already made strict compatibility testing for us and the ink of the HP DeskJet 640C Ink Cartridges is made in USA. As long as following the compatible printer list we provide, there should be no problem.
2.Why buy compatible cartridges from http://www.britanniainks.co.uk?
Our compatible HP DeskJet 640C Ink Cartridges come with the latest chip and work the same way as original. They are filled with highest quality ink (which is made in US) and gives best performance as originals. You will save 50% or more on the cost when using our compatible cartridges comparing with originals. Our HP DeskJet 640C Ink Cartridges have up to 18 months shelf life and we offer no quibble 12 months warranty.
3.Will using compatible HP DeskJet 640C Ink Cartridges void the printer manufacturer warranty?
No. The customers can freely choose the consumables from third parties, and the printer manufacturer cannot void the warrant by the excuse. This is stated in the law.
4.What are OEM (original) HP DeskJet 640C Ink Cartridges?
OEM (Original Equipment Manufacturer) means that the product is coming from the original manufacturer. OEM HP DeskJet 640C Ink Cartridges truly owns good quality, but meantime, the price is expensive.