If you could wish for a new type a printing filament, which properties would it/they have?
On my wishlist is a polymer that can change color with temperature!
What are your suggestions?
Already exists! http://www.makergeeks.com/theccchfi.html
If we could figure out one that can carry a current with decently small resistance, that would be great for printing embedded circuits. It would require a dual extruder though.
A stiffer, cheaper and more temperature-resistant Nylon.
@Thomas_Sanladerer , the Taulmans aren’t enough? Eg. The new Bridge?
@Tim_Elmore , I was more thinking of one that can change color permanently with with ±5 degrees during printing.
@Peter_Parnes they already go a long way, bit there’s still some room for improvement on those three factors. Basically, I want polycarbonate with a lower surface energy and without the warp issues 
I wish for a filament that can change and hold its colour after a slight current is past though it.
@Thomas_Sanladerer Why do you specifically ask for a lower surface energy?
@Ben_Malcheski a low surface energy usually goes hand in hand with abrasion resistance, a low friction coefficient and good resistance to chemicals and weathering.
@Thomas_Sanladerer I understand now. Wasn’t sure if you had a particular application in mind or what.
@Thomas_Sanladerer Stay tuned…We’re just getting started over here. A stiffer nylon is an extracted nylon. Like some connector housings. We have these, and are working to get the viscosity to a 3D Printing level.
We have several polymers and co-polymers in the cue. Our # 1 long term high strength polymer goal is to tame polycarbonate and still maintain as much strength as possible. Current cue has 14 items… Users should never hesitate to send us a wish list.
After my recent experiences with PC-ABS from ProtoPasta, I want more filaments that come out with surface that is a bit rough/textured. It really seems to help hide layer lines and make solvent smoothing work better.
@Whosa_whatsis I wonder how acetone affects PC when it is blended with ABS. Acetone and many other solvents normally cause environmental stress cracking in neat polycarbonate.
@Ben_Malcheski I very brief exposure (quick dunk) seemed to smooth it pretty nicely. Leaving it in longer caused the surface to turn white and crack.
@Thomas_Sanladerer Delrin/POM which we have fits the material properties bill for that, but getting to bond to a bed is hell. We have some POM 3mm sheet now which we will try printing on with a hopefully detachable raft. Warp is still an issue, needs more heated chamber.
@Tom_Martz I’m really keen to see how your materials development goes. Taming PC would be a huge step. PET is similar enough to PC that it might be usefully miscible.
The new colorfabb XT has been reformulated, prints at 250-260C and is quite a bit more “polycarbonate-like”