Is the ink waterproof?

I purchased 12 pens, .05mm, all black liquid ink.... Nowhere does it say it's waterproof. I purchased them based on someone here saying they were waterproof and I know it was a crap shoot. The pens draw beautifully, the ink flows nicely from the pen, even on heavy cold press wc paper, but no- it is NOT waterproof.

Are they really quick dry or does the ink smudge?

Best fine point I’ve found. Quick dry and wonderful pens. Highly recommend

Is the product quality guaranteed?

If you purchase through Prime and you’re not happy with the product, they offer free returns. I have used these pens for a year and they are my favorite very fine point pens.

There are 7 black pens in set A. Are all of them 0.5 mm or do they come in different measurements?

I'm not totally sure about that. I know that the entire set was 0.5 but I'm sure you could order a set of different sizes. Hope that helps.

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Frienda 12 Pieces Rolling Ball Pens 0.5 mm Japanese Quick Drying Fine Point Pens Liquid Ink Smooth Writing for Office Student Back to School Supplies(Black)

Frienda 12 Pieces Rolling Ball Pens 0.5 mm Japanese Quick Drying Fine Point Pens Liquid Ink Smooth Writing for Office Student Back to School Supplies(Black)

Product ID: 87588114

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Details

Brand
Frienda
Writing Instrument Form
Roller Ball
Color
Black
Ink Color
Black
Age Range (Description)
Adult

⚡super quick-drying ink

🔍transparent ink supply window

🖊️0.5 mm extra fine precision

Description

🖋️ Write sharp, dry fast, and stay ahead of the pack!

INK VISIBILITY - Transparent barrel lets you track ink levels—never get caught off guard
NO MORE SMUDGES - Super quick-drying liquid ink keeps your notes flawless and organized
SMOOTH OPERATOR - Built-in ink regulator ensures consistent, effortless writing flow
PINPOINT PRECISION - Extra fine 0.5 mm tip for crisp, clean lines every time
VERSATILE ESSENTIAL - Perfect for office, school, or creative projects—your everyday writing upgrade

The Frienda 12-piece set of 0.5 mm rolling ball pens features super quick-drying black liquid ink with an extra fine tip for precise, smooth writing. Its transparent barrel design prevents ink surprises by showing ink levels clearly, while the built-in ink regulator guarantees consistent flow. Ideal for professionals and students seeking neat, smudge-free notes and stylish, durable pens for everyday use.

Specifications

Manufacturer	Frienda
Brand	Frienda
Item Weight	3.84 ounces
Product Dimensions	5.91 x 5.51 x 0.59 inches
Is Discontinued By Manufacturer	No
Color	Black
Closure	Snap
Grip Type	Smooth
Material Type	paper
Number of Items	1
Size	12 Count (Pack of 1)
Point Type	Extra Fine
Line Size	0.5 millimeters
Ink Color	Black
Manufacturer Part Number	Frienda-Rolling Ball Pens-01

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