I have printed now about 1.5 Kg of the nGEN PLA from ColorFabb and I didn't had one single Hot-End clog. On top of that the shrinkage is very consistent and no warping on big parts. (>120x120 mm)
Before randomly my Hot-End was clogging and that is not nice in a 10 or more hours print.
The nGEN PLA material is quite expensive but for me worth a lot because I can start a print and don't have to worry anymore for having starting all over again.
- Bed temperature first layer 80 C second and all other layers 70 C
- No cooling. (I never cool)
- Hot-End temperature first layer 235C and all other layers 230. (as recommended by ColorFabb)
- Sugar water as sticking material. (Two layers)
and yes, ... that hot for nGEN PLA
Have a nice one