Bubbles In Plastic?

November 6, 2015

Hi guys,

I recently purchased a TWSBI 580al and it is great.

I inked it up and I noticed that there are few clear "bubbles" along the barrel.

They are fixed, that is, they don't vanish if I shake the ink in the pen.

I am wondering if they are air bubbles within the plastic or something else.

What do you think?

Not a big deal, just curious.

November 6, 2015

Do they stay put when the plunger moves past them?

November 7, 2015

Do they stay put when the plunger moves past them?

Well, I thought about that. I'll check careful once I run out of ink.

If they move, there's something in the inner surface of the barrel and I can probably remove it by flushing the pen more carefully (maybe it's just silicone grease?).

If they don't move... they are bubbles within the plastic and there's nothing I can do.

I'll post the outcome...

November 9, 2015

Sounds good.

November 16, 2015

That plunger is moving very slow.

Edited November 16, 2015 by Force

November 16, 2015

I have a similar thing with Diamine Registrar's.

Strongly suggest that Iron-Galls should go with converter, last time I fill them in my ECO, and found my pen almost ruined by it.

November 18, 2015

That plunger is moving very slow.

LOL. Maybe he forgot about this thread?

November 18, 2015

It takes time to use 2ml of ink on an extrafine nib!

Anyway, even though I did not run out of ink yet, I believe it is some residue on in the inner surface of the barrel because the "bubbles" got colored with the ink color.

November 19, 2015

Maybe a little blob of silicone grease.

January 30, 2016

Just wanted to let anyone know that the pen is fine. It was just a grease residue. I cleaned the pen and it is gone now!

January 31, 2016

I have a TWSBI Diamond 580 in Red. The bubble is between the threads on the plunger and the plunger itself. It's just below the threads. It's possibly a bit of silicone, but I am not going to take the pen apart just to find out if that is true.