Neopost IS-420 Ink Cartridges

The following 1 products are guaranteed to work in your Neopost IS-420 printer:

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Blue ink cartridges for the Neopost IS-420 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.

    Also note that by using these ink cartridges, you will not be invalidating the lease or warranty on your Neopost printer.

    As with everything we sell, they are covered by our 100% money back guarantee.

  • Lowest online price guaranteed

    Lowest online price guaranteed

    If within 7 days of buying a product from us, you find the same product cheaper at any other UK online store, we will refund you with 100% of the difference.

    For more information, click on the Low Price Guarantee link at the bottom of this page.

  • 100% satisfaction guaranteed
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
In stock
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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  • We have an IS-420 franking machine and have previously bought Neopost cartridge 310051. Do you have a compatible cartridge for this?

    Neopost IS-420 Cartridge compatability

    Thank you for your question. Yes we have compatible cartridges for this machine. Please see link below

    Answered by Joe Hemlin (Staff Member) - 7 months ago
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Neopost IS-420 Printer Review

Expert review of the Neopost IS-420 printer 10 May 2012

Our Verdict:

The Neopost IS-420 is a printer which is certainly worth considering, even though many of you will have perhaps overlooked the Neopost name. However, Neopost is at the forefront of franking equipment as demonstrated by the IS-420. Featuring state-of-the-art technology, the Neopost IS-420 franking machine has plenty to offer and is a fairly affordable product to boot.


If the truth be told, on a purely cosmetic level, the Neopost range has struggled to keep up with a few of its competitors, but the Neopost IS-420 is something else entirely. Offering a sleek, ergonomic and brave design., the IS420 has a wonderful user interface. The subtle colour scheme also makes this a very pleasing printer indeed!


As previously stated, the Neopost IS-420 is a tough little number and one which shouldn't cost you much in order to purchase, particularly online. Designed as a mid-volume digital mailing system, the Neopost IS420 is fast and user-friendly. Simplicity is key to the success of the Neopost IS-420 and the machine itself is lacking in unnecessary buttons and dials whilst results were often very pleasing in our tests. Low noise levels also ensure that the Neopost IS 420 is whisper- quiet and fits comfortably into its surroundings.


The IS420 franking machine will not change your life, this much is true, but the Neopost IS-420 does a great deal for a very reasonable price. As a result, you too could certainly benefit from giving the Neopost IS-420 a go as it offers many top flight features at a very pleasing price, something which cannot be guaranteed where other printers which are currently available on the market are concerned, even other Neopost printers in truth.