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I've used zebra blue...
February 5, 2014
Verified Purchase
I've used zebra blue black inks in the past and found them to be exceptionally good. The color was almost black with a hint of blue making them a unique personal trade mark of sorts. These refills however were truly a disappointment. The color was almost "turquoise" and the refills ink supply runs out much quicker. Unfortunately, I was unable to return them within the allotted time frame so am stuck with them.
1 person found this helpful
I've been using these...
May 6, 2015
Verified Purchase
I've been using these in my Retro 51 Tornado and they're pretty darn fantastic. I think this color is a great blue-black. One star off because the refill is very small and I burn through them very quickly.
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