I recently had some awesome prints on my U2 using Matter Hackers Pro Black ABS. I have an acrylic door on the front and an acrylic cover on top. Printed slow and steady, somewhere around 30 for infill & inner shell and 20 for outer shell (hotend at 252 & build plate at 100) and they came out better than anything else I had printed in the past.
Here is one example. The support material left some scarring, but I was able to sand that down and give it a 30 second steaming acetone bath for final gloss. The kludgy glued & tied up support was necessary to fix some support that fell over during printing.
I like the white ABS I have, but don't remember where I got it from.
Here's a link to MH's Pro Black ABS:http://www.matterhackers.com/store/3d-printer-filament/pro-series-black-abs-filament-3.00mm Oh, and beware MH's spools (at least the ABS ones I've tried) tend to unwind themselves if you have a modified spool holder with bearings! I put on a new spool and it unravels itself by at least 10 or more spins. I have lots of other spools from other places and they don't seem to unwind like the MH's do. As long as I keep everything aligned, it works ok.
Edited by Guest
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rowiac 53
I have had good luck with ProtoParadigm ProSpec PLA in Marble White and other colors. I have not tried black yet. Besides the price being right, the material is good quality and uniform in dimension. The material seems less brittle than other PLAs. I had one problem with the coil getting tangled resulting in a failed print, but that has been only one time out of maybe three 1kg spools.
On my UMO+ I print at 200°C and standard Cura print speeds with 60°C bed with good results.
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