on saleKaweco Ruby Red - Ink Cartridges

Product Code KAW-10000008-22

In Stock

out of stock

on saleKaweco Ruby Red - Ink Cartridges

Product Code KAW-10000008-22

In Stock

out of stock


Box of 6 red ink cartridges for all Kaweco cartridge fountain pens or any other pen that accepts short standard international cartridges.

Click here to shop all of our fountain pens that accept these cartridges.

Ink Cartridges
Max Ink Capacity - Cartridge

The maximum volume of ink that can fit in the pen when using a cartridge.

Cartridge Type
Standard international short
Number of Cartridges
Fast Drying

Whether or not the ink contains glittery particles.

Freeze Resistant

Whether or not an ink is specially formulated to better withstand freezing temperatures.

Iron Gall

Ink made from iron salts and tannic acids. Though quite permanent and waterproof, these inks are typically known for causing chemical corrosion to metal pen parts (especially the nib) and should be used sparingly or with less-valuable pens.


Whether or not an ink is specially formulated to increase flow in your pen.


Whether or not the ink contains finely-ground solid particles in liquid suspension.

Water Resistant

Whether or not the ink, once dried on the paper, will resist being washed away with water.


Customer Reviews

Based on 11 reviews
Stacy B.
Gift for my Sister!

She is loving her Fountain Pen experience! I have got her totally in the "group"!

Andrea J.
Ruby Red

This is one of my go-to markup inks due to its dry time and being easy on the eyes for a still noticeable red. I do find that it will dry start more often than my other Kaweco cartridge colors.

Christopher D.

Good ink. I was having problems with dryness/bad flow in all my Kawecos (a Lilliput, 3 Sports, a Sport Brass). I've found that using Kaweco ink solves the problem and I don't have to research anything, which is good: I don't have the time (or the inclination, really) to research ink properties. The ink is wet enough, and it dries quickly enough. So, Wet and Fast. I haven't checked water resistance, but I assume it's washable, so Low. My eyes are getting too old to discern shading very well, so Medium. But please don't take my word for it! :)

Amy F.
Work great and love the color

Very nice, easy to use!

Kaye T.
Red's always been my favorite color

I don't mind the shades of red as while I'm writing, although I'd prefer a consistent shade. Nevertheless, any versions of red are considered acceptable. the scale for Value I'm guessing you mean for the cost, it's one of the best and preferable prices for the money because at the office supply store, for $6 is a package of 3 and not 6. So the value is worth the money :)

FAQ about Ink Cartridges

What fountain pens are compatible with ink cartridges? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

There are two main groups of ink cartridges: standard international (available in short and long sizes), and proprietary (which only fit that particular brand). You can read which cartridges fit a given fountain pen in that pen's product description or Tech Specs.

You can also check out our Cartridge/Converter guide for general brand guidance if you’re unsure.

To locate pens that fit each size of ink cartridges, click here:

How do I install an ink cartridge? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

We've got a great blog post on this topic: How to Install an Ink Cartridge.

Or, just watch the video here!

Can I refill an ink cartridge? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

Yes! You'll need an ink syringe, but it's pretty easy to do. We've got a detailed video blog post here: How to Refill a Fountain Pen Ink Cartridge.

Or here's a quick version of the video:

Do ink cartridges generally write more dry than bottled ink? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

Yes, they do.

What's your return policy for ink cartridges? 8EDA1617-F73A-4DAF-8245-6D2BF4ABEB7B

We do not accept returns for ink that has been used. Otherwise, we accept returns on unused ink products for up to 30 days from purchase. You can read all our Return Policies here.

To initiate a return, please submit a request at the Return Portal. Our Customer Care team might reach out to you for more information.