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How to clean Diamine Imperial Purple stains out of a cartridge? (self.fountainpens)

submitted 1 month ago by Shihali to c/[email protected]

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I tested Diamine Imperial Purple in a reused Sailor cartridge before putting it in a demonstrator, and the result was a stained cartridge. I love the color, but I haven't had any luck getting it out of my cartridge with water, soap, a little bit of ammonia, and time.

I don't write much, so a pen could stay inked up for months on end.

Is there a way to get this color out of plastic? Is it safe to use in converters and demonstrators without staining them too?

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[–] [email protected] 3 points 1 month ago (1 children)

@Shihali have you let the ammonia sit inside the cartridge overnight? Or how did you use it?

[–] Shihali 3 points 1 month ago (1 children)

I forget how long I let the diluted ammonia (about 10% household ammonia, 90% water) sit in the cartridge. I don't think it was overnight.

[–] [email protected] 4 points 1 month ago (1 children)

@Shihali so, other than aesthetics, staining the cartridge is basically harmless. It stains because the cartridges are made of polypropylene. You could just put another ink there despite the stain and it would be fine, you probably wouldn’t notice if it were an ink that was in about the same color range like a blue.

The converters do not stain as easily and you can take them apart and clean them with a pipe cleaner if that’s what you prefer.

[–] Shihali 2 points 1 month ago

That's reassuring. I took staining the cartridge as a sign of things to come.