Uni-ball Signo UM-120 Gel Ink Rollerball Pen 0.7mm Violet Box of 12

uni-ball publishes the UM-120 ink as waterproof pigment ink, and that is uni-ball's own wording for this model. No test standard is published behind the word, so treat it as water resistance on ordinary paper rather than a guarantee against soaking.

uni-ball does not publish that for UM-120, so we will not state it either way. The product photography on uni-ball's own page is the best guide until we can confirm it from the pack.

Yes. uni-ball publishes UMR-5N as the refill for UM-120, so the barrel can be kept in service rather than replaced. The refill is sold separately.

Eight: black, blue, red, green, orange, light blue, violet and pink. Those are the ink colours uni-ball names for UM-120 on its own safety data sheet.

Yes. uni-ball publishes the UM-120 ink as acid free, which is the specification that matters for records, albums and anything meant to be kept.

uni-ball's safety data sheet classifies the ink as a skin sensitiser, Category 1, signal word Warning, hazard statement H317, may cause an allergic skin reaction. Ordinary writing is not the concern; avoid prolonged contact with the ink itself.

Twelve, all violet. Each of the eight published colours is ordered as its own box of twelve.

We do not know, and we are not going to guess. uni-ball's safety data sheet names Mitsubishi Pencil Company, Limited as the manufacturer and Mitsubishi Pencil Australia as the local supplier, but no country of origin is published for this model.

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