OK, I can eat my words. <http://www.trident-itw.com/Capability.asp?CapabilityID=1106&Cat1ID=1201&Cat2ID=300> Says it's glycol ether/diacetone alcohol based. Claims to dry waterproof and print onto (among other things) aluminum and PVC pipe. I've already been in contact with them about their textile inket inks, I just emailed for more info about this ink. Steve Greenfield
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Fastdry black waterproof inkjet ink
2006-05-05 by Steve Greenfield