It might be possible for you to download drivers for your Pitney Bowes Mailstation K721 printer from the following support page on the Pitney Bowes website: http://www.pitneybowes.com/uk/support.html

Provided that you have a UK version of a Pitney Bowes K721 series franking machine, we guarantee that any of the ink cartridges listed on this page will work in the printer. This currently includes the compatible 797-0 red ink cartridge and the compatible 797-0SB blue ink cartridge.

If you're using a genuine Pitney Bowes K721 ink cartridge then it will look slightly different to the cartridge we're supplying which is made by another retailer as a cheaper alternative. Pitney Bowes cartridges have a patented design which can't be copied. However, this should not cause a problem for you because our compatible K721 ink cartridges are also Royal Mail approved and are guaranteed to work in your franking machine as well. We offer a money back guarantee on these compatible Pitney Bowes K721 ink cartridges so if they don't fit your printer and work reliably you can send them back for a refund or replacement.

Yes, Royal Mail are eventually changing from red to blue ink as they found that their machines read blue ink more easily.

If you were to switch from red to blue now, we would advise you to have your machine professionally cleaned to clear any red ink from inside the machine.

You can check with Pitney Bowes to see if this will be necessary for your machine, as not all of them will require a clean to be done.

Yes, eventually all franking machine cartridges will be changing to blue in line with Royal Mail requirements. They had tested the colours and the scanning machines can read the blue ink much easier than the red.

If you'll be changing to blue from red, we would advise that your machine may need to be professionally cleaned but Pitney Bowes can clarify this if you contact them.