Everything Bink said, it is very expensive, and too thick to print straight out of the bucket without major hassles. I add the grey to a good white ink to lower the flash times, the grey gels at such a low temp that your flash times will be so short, your pallets won't even heat up sometimes. Besides super fast flash times, the grey is probably the best bleed blocker that I've ever used. I try to use as little as possible to get the bleed resistance I want and the flash times down.