Black and runny...,
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This review is from: Lamy T10 Ink Cartridges BLACK 4x5 (20 Cartridges) (Office Product)
...and in cartridges that are a perfect fit for my Lamy Safari - a winner. But seriously, I had considered getting a re-usable reservoir and a bottle of ink. Even though I use the pen daily, this stash of 20 cartridges will last a good 18 months. Of course, a bottle of the black stuff would be lovely but the return on investment on this and the reservoir would take over three years to start materialising and cartridges really are very convenient.