Red. I wonder if this unit is something I heard about from some Inkjet Junkies I've done some contract work for. They know of a few that came up with some plastic (liquid in it's normal state) that is jetted from an inkjet head - this alows extreme control of where the liquid is applied - and upon application, hit with a laser to immediately cure it prior to it running out of position. Again, I've only heard about it but I'd love to see it in person.

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