Can you use it in a fountain pen?

Do not use this ink in a fountain pen. This ink has pigments - think of tiny granules of pigment suspended in water. Those granules will clog a fountain pen feed over time. True fountain pen inks have no floating particles. This ink is for dip pens (no ink reservoir, just dip and write) or brush painting only.

Can this be used on smooth bristol paper? I read that sumi ink only adheres to rice paper, but I'm not sure about the validity of that claim.

Well, I've used it on smooth bristol paper, as well as a number of other types of paper and had no problems at all when it comes to the ink adhering to any of them.

Can i put this in a bingo dabber ? and use for poster boards? also if i paint over it would it seep through ?

I wouldn't put it in a dabber for Bingo. It's Chinese liquid stick ink. You want something that is water soluble. Depending on the paint over ink, it might seep through. Mainly a calligraphy/drawing ink.

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Black Sumi Ink (Bokuju) 12 oz.

Product ID: 297049892

Details

Brand
Yasutomo
Global Trade Identification Number
Item Volume
354.88
Package Information
Bottle
Paint Type
Oil

⏳No grinding, instant use

💧Water-resistant shellac blend

🖤Deepest black pigment

$88.63

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Description

🖌️ Elevate your art with the black ink that means business.

BUILT TO LAST - A subtle shellac infusion ensures your artwork stays water-resistant and vibrant over time.
ECONOMICAL MASTERY - Generous 12 oz bottle offers long-lasting value for professionals and hobbyists alike.
READY WHEN YOU ARE - Skip the grind—this liquid ink is pre-mixed and ready to fuel your creativity instantly.
INK AS BOLD AS YOUR VISION - Experience the blackest black with premium vegetable oil soot for unmatched depth and intensity.
TRUSTED BY CREATIVES WORLDWIDE - Highly rated with 4.7 stars from over 230 reviews—join the community of inspired artists.

Yasutomo Black Sumi Ink (Bokuju) is a 12 oz bottle of permanent liquid ink crafted from high-quality vegetable oil soot. Designed for convenience, it eliminates the traditional grinding process and includes shellac for water resistance, making it ideal for artists seeking deep, lasting black tones with professional reliability.

Specifications

ASIN	B004O7AIUW
Brand	Yasutomo
Brand Name	Yasutomo
Container Type	Bottle
Customer Reviews	4.7 out of 5 stars 233 Reviews
Display Volume	354.88 Millilitres
Global Trade Identification Number	00031248012722
Ink Colour	Black
Item Volume	354.88 Millilitres
Item Weight	408 g
Manufacturer	Yasutomo
Package Information	Bottle
Paint Type	Oil
UPC	031248012722

Reviews

A**Z

Blackest of BLACK Ink

30.06.2025

R**A

Good standby ink.

3.01.2026

Y**U

excellent and cheap

8.01.2025

E**.

Beautiful Black Ink

21.06.2025

A**O

Item as described

3.08.2023

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$88.63

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to British Virgin Islands.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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2 weeks ago

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