I recently had a series of issues with my prusa MK3 that kicked off when I tried to print with Proto-pasta's glitter filament using a 0.4 mm nozzle. The glitter clogged up and cleaning it out was pretty difficult.
A different user here pointed out that 0.4 mm was too small for glitter filament. When I initially read (and, after the clogging fiasco, re-read) the Proto-pasta website I didn't find any information suggesting that a larger nozzle borehole diameter was necessary.
I have the glitter and metalic green filaments. Do I need a nozzle with a larger diameter to print these or not? I emailed Proto-pasta about it the other day but have yet to hear back.
Here's the reply I got from proto-pasta on these questions:
Thank you for following up. Yes cold pulls that leave behind material can cause all sorts of trouble. It happens to me on the Lulzbot quite often, probably my biggest gripe about that machine. Anyways, on to your questions:
Is this accurate? Should I print the glitter filament with a nozzle with a larger borehole diameter? A larger bore is not needed, the glitter flake is quite small and flows through a 0.4 nozzle fine. However, using a 0.4 nozzle and printing layer heights of 0.1 or 0.05 with glitter can cause a shift in apparent color as it forces the glitter to lay down flat.
If so, what diameter should I use? 0.6? While not needed, a 0.6 nozzle does allow for a better sparkle or shine from the glitter filament.
Are there other proto-pasta filaments that require a larger borehole? Generally any metal or wood filled filament benefits from a large nozzle size. For example, wood filaments most people suggest a 0.5 for better flow but they do work at 0.4. For us, we like to use 0.6 on the metal fills as it allows for a good flow.
I have a spool of matte fiber htpla that I got with my last order. Can I print this with my nozzle? The matte fiber was designed as a non-abasive alternative to the Carbon Fiber filament. It does not require a larger nozzle, a 0.4 will work just fine.