Neopost IS-350 Ink Cartridges

The following 1 products are guaranteed to work in your Neopost IS-350 printer:

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Blue ink cartridges for the Neopost IS-350 printer

Compatible Blue Neopost 310050 Ink Cartridge - (Blue Neopost 300621 Franking Cartridge)
  • Blue ink cartridge
  • Neopost alternative (Royal Mail approved)

    This cartridge is a direct replacement for the Neopost version. Fully approved by Royal Mail and CE marked, the inks in these cartridges have passed stringent quality tests to ensure they are suitable for the UK postal system.

  • 12 month guarantee and FREE returns

    If within a year of purchase you happen to experience any quality problem, we'll happily provide a replacement, or a full refund.

    Whatever the reason for returning items to, you will never pay a penny for postage.

  • Won't invalidate your printer warranty

    We guarantee that your standard printer warranty will not be invalidated by using our premium brand cartridges. If any of our cartridges do cause a problem with your printer, we'll arrange for your printer to be repaired (or replaced if it can't be repaired).

0.4p per impression
12,000 impressions
1 £45.83 (£55.00 inc VAT)
2 £42.53 (£51.03 inc VAT)
3+ £41.00 (£49.20 inc VAT)
Prices includes FREE next-day delivery
0.4p per impression
12,000 impressions
£45.83 (£55.00 inc VAT)

FREE next-day delivery

Multi-buy discount
2 £42.53 (£51.03 inc VAT)
3+ £41.00 (£49.20 inc VAT)

Customer Questions & Answers

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Ask us a question we're happy to help!

  • Are these new cartridges or refilled ones for the Neopsot IS-350?

    Neopost IS-350 franking cartridge type

    These are compatible Neopost IS350 ink cartridges which are made by a third-party manufacturer rather than Neopost. These compatible ink cartridges for the IS-350 are brand new and have not been remanufactured or refilled. Although they are made by a third-party manufacturer they are Royal Mail approved.

    Answered by Vicky Lush (Staff Member) - about 5 years ago
  • Hi, I've just found out that the colour of ink in our franking machine, a Neopost IS350, has to change from red to blue. Do you supply blue ink for the IS-350 machine and, if so, how much is it?

    Blue ink for Neopost IS-350

    Yes, we now supply a compatible Neopost IS-350 blue ink cartridge. You can see this item at its current price by following this direct link to the product:

    Answered by Cheryl Stanley (Staff Member) - over 4 years ago
  • Will using these replacement ink cartridges in my Neopost IS-350 franking machine invalidate my maintenance contract do you know?

    Is my Neopsot IS-350 printer protected when using compatible cartridges?

    Unfortunately, as we don't know the terms of your maintenance contract we wouldn't be able to tell you if this would be invalidated by using our compatible Neopost IS-350 ink cartridges. Under normal circumstances, we guarantee that simply by using our compatible Neopost IS-350 cartridges you won't void the warranty on your printer. If you do experience a problem, and it's proved that a compatible cartridge we supplied you with caused damage to the printer, we would handle the cost of the repair. We also offer a money back guarantee on compatible Neopst IS-350 ink cartridges to ensure that they work reliably in your printer. For further information on our 100% satisfaction guarantee and returns policy please see:

    Answered by Amanda Garnett (Staff Member) - over 3 years ago
  • Our Neopost serial number is N3016029 - Neopost IS300 series. Are these cartridges compatible?

    Neopost IS-300 series ink

    Cartridge compatibility is determined by the printer model number e.g. IS-350 rather than the serial number or the printer series. However, if you have a Neopost IS-300 series franking machine (IS-330 or IS-350) then the compatible 300620 or 300621 print cartridges listed on this page for the IS-350 franking machine are suitable for use in your machine.

    Answered by Euphemia Milner (Staff Member) - almost 3 years ago
  • Hi, I'm looking to order a cartridge for our IS-350 Neopost franking machine. Can you advise what kind of expiry date (if any) these will have please? I bought two IS350 cartridges back in June last year from another supplier but they expire in March this year which kind of defeats the object of trying to save money by buying two to keep one as a spare.

    Expiry date for Neopost IS-350 cartridges

    It depends on when you purchase these compatible Neopost IS-350 ink cartridges as to what the unique expiry date is on each particular cartridge. However, we guarantee that our compatible Neopost IS-350 ink cartridges will have an expiry date that's at least 12 months on from the date of purchase so you'll be able to store them under the correct conditions for up to one year and they should work perfectly for you. We also offer a one year warranty on compatible Neopost IS350 ink cartridges so you'll be able to send them back during this period for a refund or replacement if they don't work reliably for you. Please see:

    Answered by Damon Tetley (Staff Member) - over 2 years ago
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Neopost IS-350 Printer Review

Expert review of the Neopost IS-350 printer 10 May 2012

Our Verdict:

Picking the right printer for your specific needs and requirements can take some effort, but this is merely a result of the sheer number of choices available to you. To make sure you pick the right printer for you, you first need to be aware of all your options; options such as the Neopost IS-350. But does this printer stand up to the competition? It's a tall order, certainly.


As the Neopost IS-350 is a desktop mailing system or franking machine it has a conventional design making it easy for you to weigh, rate, post and track your mail. The most noticeable design feature of the Neopost IS350 is the weighing platform which acts as the base of the machine. There are two different ways of looking at the Neopost IS-350 in terms of design. Some will no doubt be left a little confused by the overall look of this machine as it isn't easy to describe; something the Photosmart range has pretty much mastered. However, on the plus side, the user interface on the Neopost IS-350 is very pleasing indeed and the forward thinking shape is certainly worthy of note.


Besides the ease of use, the Neopost IS-350 has plenty to offer anyone who is looking for a franking machine that performs with speed and intelligence. The Neopost IS350 allows for simple printing, produces fine results and can be used many times before ink needs to be replaced. Put simply, there is little to complain about in a mechanical sense where the Neopost IS-350 is concerned.


Other than the fact that it's not the most easy on the eye machine, the Neopost IS-350 has little wrong with it and if a quality home printer is on your shopping list this year, then a Neopost IS-350 might be worthy of further investigation as it's pretty affordable too, particularly online.