30 PCS Jinhao Fountain Pen Ink Cartridges Refill 6 Colors Set, Black, Blue, Apple Green, Purple, Red and Orange International Standard Size 2.6mm Bore Diameter

Nice and easy to use

I bought these ink cartridges because they were said to fit in the Amazon Basics fountain pen, which was my first fountain pen. I am still new to inks and pens but I can tell you that these Jinhao ink cartridges do work for that pen pretty well, and are a lot longer than the cartridges that came with the Amazon Basics pen. I use that pen for everyday writing, and I know that I will still be using these cartridges for probably over a year before needing to order more. I will note that they are too long for the Speedball fountain pen I picked up at a local art supply store, but I don't like that pen as much anyway. I am now waiting for a Jinhao pen to arrive and enjoying these cartridges. Pictured is the Amazon Basics ink cartridge (that I use in my Speedball now) compared to one of these Jinhao cartridges with a dollar bill for reference. The other picture also shows the cartridge currently in my Amazon Basics pen that I have used about quite a bit of compared to the dollar bill and another Jinhao cartridge completely full and on its own. I hope to switch to bottled ink when I finish with these to waste less plastic and have more color variety but I will likely use the Jinhao cartridges day-to-day when I return to working in an office and want the added convenience. I like that there is a blue option for the ink.

Only fits their brand of pen

The ink comes out as expected in the proper color.

Works great with my fountain pen.

Plenty of cartridges for many pens I have taking such cartridges. Just have to make sure I use them before they evaporate.

I bought those cartridges, because they claimed to be standard cartridges, fitting my fountain pen. They might be, but they did not fit in my pens. They fit somehow, but not good enough to use them. When the fountain pen is not used for a few hours, no ink is coming out anymore. It's just a nightmare. I always used Pelikan cartridges, which cost about 3 times as much and was trying to change to a more economical version. Wrong!!! I ordered Pelikan again and they work just wonderful. Forget those. Stick with something, which works.

The blue ink in this set of inks is very good quality, maybe as nice as Waterman Serenity Blue (except Waterman bottled ink comes with the bonus of excellent bottles, almost worth the price of a Waterman bottle of ink even without the ink). A couple others are pretty good as well. Black is pretty serviceable, though I'd take Waterman Intense Black or (especially) Aurora Black instead any day of the week. The green and orange inks, on the other hand, seem anemic on paper, and they rob the fountain pen writing experience of some of its smoothness. They feel "dry" and rough, and can probably just be thrown away without really missing anything. Of the inks in this set, I'd only bother buying the black (which you can get in cartridges without any other colors for dirt cheap as well) to give away to people who need some emergency ink or something like that, or the blue if I could get it without the rest of the colors because the Jinhao blue ink is quite nice and it's dirt cheap for cartridge ink. In practice, I might buy more black to give away, as I mentioned above, but I'm likely to just buy Waterman Serenity Blue for my blue ink, and use Aurora Black (my overall favorite ink so far) in my everyday writer. Given the cheap price for this, the "value for money" should be five stars, but the fact a third of the ink I got is borderline unusable suggests I should remove one star from the value rating for these inks. Because of that, a "quality" rating should be lower than the "value for money", "presentation", and "easy to use" ratings I gave this ink, but Amazon doesn't at this time offer a "quality" rating category. It's reflected in my three-star overall rating.

Todo muy bien, cumplen su función, llegaron en el tiempo prometido

These are a little narrow for some of the bigger brands of fountain pens (ie Lamy) but they're lovely for the Asian brands that I have and fit my J Herbin brand rollerball pen (https://www.amazon.ca/gp/product/B00A6VZYKE/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1), which as a side note is a nice pen option to have and I would suggest it for any ink lovers. These do not fit Schneider brand rollerball pens (ie: https://www.amazon.ca/gp/product/B07MPHQXVP/ref=ppx_yo_dt_b_asin_title_o02_s02?ie=UTF8&psc=1)

When firmly inserted in the pens of the same brand, all the pens leaked out the nibs. Caps filled with ink and when you took the cap off you had ink everywhere

万年筆をよく使いますので、二回目の購入をしました。綺麗な黒色です。インクの流れも良く、スムーズです。コストパフォーマンス抜群です。

コンバーターが不良だった（新しいコンバーターも二個送って頂きました）ので、購入しました。色は、ペリカンのロイヤルブルーより若干濃い色合いです。パイロットのブルーブラックの青色を強くしたような色です。初めて使いますが、私は気に入りました。