Montblanc Golden Yellow Ink: Mold Inside the Ink Cartridges?

Montblanc Golden Yellow Ink cartridge with SITB

I was going to send some of my Montblanc Golden Yellow ink cartridges to friends today, when I noticed something strange. There was something floating inside the cartridges that wasn’t just ink.  As you can see, it looks like mold.

This is a first for me. I’ve never seen mold grow inside sealed cartridges before.  I have occasionally seen it develop in bottles of ink that had been opened and partially used. But never in any Montblanc ink.

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