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Superb waterproof black...
November 25, 2013
Verified Purchase
Superb waterproof black ink. I still write a few checks and ordinary non-waterproof ink would not be good for that. Along with the Platinum Carbon Desk Pen, I ordered a pack of these cartridges and am extremely pleased. The ink writes VERY black and dries quickly. Although I am not left handed the quick drying attribute would be a huge plus for those who are.

As for the waterproof aspects of the ink, they are fantastic. I wrote "The quick brown fox, etc." on a piece of paper, put it in a sink full of water and left it there. When I came back 15 minutes later, the paper was sodden but the writing was as crisp and dark as when I wrote it. I then crumpled the paper and squeezed the excess water from it. When I reopened the paper, the words were still crisp and dark. In fact, the paper was falling apart but the ink never did. Having this ink in my Platinum desk pen and stand is a real winner for me. When I have to jot a quick note the pen is ready to go and the permanency of the ink allows me to put the note in my breast pocket without having to worry about smudging or staining my shirt.
7 people found this helpful
I put it in a new Platinum...
September 14, 2012
Verified Purchase
I put it in a new Platinum Preppy. It writes a smooth black line, but not as smooth as my other Preppies with plain Preppy ink. It feels like the ink itself has some texture. So far, no problems -- it starts right up even after a few days idle.
7 people found this helpful
If you're an artist who...
July 30, 2009
If you're an artist who likes to use any sort of wash over an inked drawing, I can recommend this ink, particularly with the Carbon Pen by Platinum. It is, indeed waterproof. I did a sketch and submersed it in the sink. The lines remained crisp. This is great news if you like waterproof ink but find it challenging to carry a bottle and dip pen around with you everywhere.
6 people found this helpful
Love it! I used it to...
August 28, 2009
Verified Purchase
Love it! I used it to refill my Platinum Preppy Fountain Pen and it works great :) I love how the ink looks when you slant the paper.. it has a certain finish to it I can't explain lol Anyway, I've noticed that it doesn't smudge when I use a highlighter! It's very smooth and not that pricey!
3 people found this helpful
excellent product...
November 27, 2015
Verified Purchase
excellent product
1 person found this helpful
This ink is the BEST...
June 27, 2016
Verified Purchase
This ink is the BEST best for linework before watercolor. If it bleeds at all, it isn't noticeable. It's even better than dr. Ph martins. So glad I found it.
I purchased these to...
June 15, 2016
Verified Purchase
I purchased these to go with a Preppy with a M nib that came in red. They should be useful if I travel with the pen because I expect to use black more than the red that came with the pen.
Accidentally spilled...
May 18, 2016
Verified Purchase
Accidentally spilled coffee but everything was fine! Doesn't keep bleeding into the page when I fall asleep in class so that is great too! Sometimes a little hard to get the ink flowing but other than that, I love it!
I'm using these with...
May 5, 2016
Verified Purchase
I'm using these with my Kuretake No. 40 brush pen. I needed an ink that was as close to a Yasutomo Sumi, in blackness, and this was a great fit. But erasure does cause a noticeable lift.
Nice smudge free ink...
May 2, 2016
Verified Purchase
Nice smudge free ink.
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