Lumos Assembly Guide

Watch me demoeing some FAQs on my Instagram stories here.

What ink can I use?

- All nibs will work with all (but the most experimental) fountain pen inks (think shimmer + iridescent). I've tried a LOT and I'm yet to find one that doesn't work well. I'd encourage you to experiment and find the inks that work best for you!

- I recommend Sketch ink if you would like to use a waterproof archival pigment ink. 50ml will last you for years and comes in a range of lovely colours!

- If in doubt, use ink designed for fountain pens or make sure that it's dye-based. Indian, acrylic and gouache-based inks will clog the pen. At least the tips and reservoirs are easily replaceable if this does happen!

Care instructions.

I recommend regularly cleaning your pen in a bowl of warm soapy water to remove any residual ink. Make sure you thoroughly dry any components before reinserting them into the pen.  Making sure there isn't any ink in the threaded parts of the pen. To lubricate your pen please use silicone grease, which creates a good seal between the components and will maintain the ink flow nicely.

I've ordered a single Lumos what is the extra white component?

This is a little spacer. Pop it inside the pen body before the other components (either way up works) and it will stop the reservoir from moving.  I designed it to make the end of the pen lighter in the hand and not feel to back heavy.  It's 3D printed from PA12, a recycled Nylon which handily absorbs any excess ink too.

Can I improve Ink Flow?

You can indeed! It's all about airflow, naturally, there should be a small space between the metal nib holder and the cotton core reservoir, sometimes this can get clogged by ink which can hinder ink flow.  The trick to getting the best airflow is to crease your cotton core reservoir so that it looks like a round-bottomed heart end on: ♡ . This allows airflow and in turn, the ink will flow more freely. An added perk is that It also keeps the reservoir nice and secure in the nib holder when refilling.

How do I change between inks?

There are two ways:

  • You can flush out the nib and ink reservoir under a warm running tap. Dry all parts thoroughly and refill with another ink. There may be a small amount of the previous colour but it will quickly blend out.

  • You can also replace the tip and reservoir as needed. Just take out the previous tip and reservoir and store them in a zip lock bag. (Lumos-specific storage coming soon).

    How do I remove a nib or untwist the ball.

    Sometimes, ink can dry around the fineliner tip making it a little tricky to budge. The best tools for the job are needle-nose pliers, tweezers, or even good ol'nail clippers to grab the tip and pull it out. (I'm also working on a little removal tool for inky tips).  If the ball on the end is also a tricky customer, you can pop marigolds (washing up gloves) on and give it a twist, the extra purchase will help loosen it. If it still needs some encouragement soaking it in warm soapy water and trying the above again will help.

    What are the differences between the Duo and the Single Lumos?

    The Duo Lumos allows you to have two different pens in one body, allowing you to easily change between nibs and ink colours on either side.

    The Single Lumos has one tip and one ink reservoir which is double the Duo's reservoir size.

    What's the difference between the Lumos and other refillable technical pens? (E.g. Rotring Isograph and Copic Multiliner).

    I designed the Lumos due to a few things I found frustrating about other refillable fineliners. Firstly, there was still quite a lot of unnecessary waste; to refill the Copic requires you to buy a plastic disposable refill and a replacement nib for the Rotring costs £20+. You're also limited by the type of ink you can use in each pen and tied into their format (much like printer cartridges). I wanted to make an extremely high quality and versatile version of a refillable fineliner, and thus the Lumos was born.

    Do the tips dull over time?

    The tips are made by the best Japanese technical pen manufacturers, so they will outlive many of their peers. Dulling/flattening of the tip depends on a few factors:

    • Smooth paper will decrease friction and in turn wear on the tips
    • Point size of the nib, the smaller the tip, the more pressure is going through a smaller area, which can shorten the tip's life.
    • A technique using excess pressure, or a style like a pointillism can shorten the lifetime of the tips.
    • Ink used, some inks flow more freely, which decreases the friction.

    The beauty is that you can replace these tips at a fraction of the cost and waste of other technical pens.

    Can I buy a selection of tips?

    Yes you can find the full tip collection here 

    and multipacks of your favourite sizes and styles here

    Will my Lumos stain or scratch?

    No, the Lumos is made from anodised aluminium and PVD-coated stainless steel, both of which will not stain. It is also extremely hard wearing for everyday use.

    How quickly does the pen dry out between uses?

    Again, this all depends on Ink choice and where you store the pen. The beauty is that it's super easy to refresh the pen by recharging the reservoir with the original ink. If your pen is running a wee bit dry you can also dip the tip in water to get it going again.

    How do your nib sizes compare to other fineliners/technical pens?

    - Nib sizes are different depending on the manufacturer (Eg Sakura, Staedler). If anything, ours are on the smaller side so it might be worth getting the size down from your preferred choice or buying the full tip collection to find the ones that work best for you here.