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Water Resistance Test of Pilot Hi-Tec-C Coleto 0.3mm Refills

Just a few photos! Sorry the light’s so dim, but it’s the best I can do–school is keeping me too busy during actual daylight hours! :-(

Got the Pilot Hi-Tec-C Coleto multipen 3-refill body, and filled it with 0.3mm refills (Apple Green, Violet, and Pink). @rcannonp on Twitter mused about how some Pilot ink had poor water resistance, while others might not be so bad. Since I’m desperately procrastinating, I decided to snap a few pics before and after a dash of water!

Here’s the pen:

And a writing sample with each ink color. I let it dry for about 36 hours.

Here’s the same writing sample immediately after running it under cold tap water for 15 seconds. The ink ran a little, but it was still reasonably legible.

Here’s the same piece of paper, after sitting for ~30 minutes:

Yes, my camera skills leave something to be desired, but this isn’t entirely my fault this time! The ink spread and became more difficult to read after sitting for a while. And it’s not a camera trick–the purple is separating, leaving a bluish “shadow,” almost like having double vision. The Apple Green is pretty difficult to read, and is not quite legible anymore. The pink isn’t too bad–it’s blurry, but legible. The purple makes my eyes cross, due to the stereo effect…. :-O

So, there you have it! Looks like the pink ink wouldn’t be bad if you spilled some water or got caught in a light rain. The other two didn’t fare as well, but you could still read it if you really tried (especially immediately after the spill).

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Comments (1)


  1. Vi Annne says:

    I spilled pepsi on my little purple notebook recently. I used Coleto and most of my scribbles where the soda seeped in are not nothing a faded layer of ink. there was nothing to read anymore. pretty saddening considering that I loved Coleto with such immensity. I still do but when I do on more important documents i use a different pen now.

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