Hi guys,
I’m trying a new green PLA filament but the first layer results similar to white… the rest of the object it’s a very nice green like aspected. Any idea?
I’ve tried couple of prints and I’ve also bought a blue filament that doesn’t have this issue (same brand same configurations)
I have a dumb question but you did purge all the old filament from the hotend right? If the previous filament was white and the first layer was mixing with the old filament that would be an easy explanation.
Aside from that, what filament? Is it getting so hot it’s decoloring?
Yes! To be sure I load couple of time the green filament and it comes down green.
Here there is the filament:
The first layer is printed little bit hotter also on the standard configuration… maybe this is my issue? I could try to decrease little bit the temperature
Ha, that’s beyond me. Could test it, I’ve never had color changing issue and I have no real idea if bleaching due to heat is even a thing, just a wild guess.
This is a company in Shenzen, China. It’s almost certain you’re getting Chinese-sourced filament. Chinese filament is notorious for being low-quality. It’s entirely possible they’re using an organic dye that degrades suddenly above a certain temperature, a dye that higher-quality manufacturers don’t use exactly for this reason.
There are ways of extruding at test temperatures not with the intent of getting an actual print but for testing. I very much doubt it’s worth doing this testing only to verify you should be buying higher-quality filament. Skip that step and just buy higher quality filament now.
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Taking @eh9’s idea, are you printing the first layer at higher temps than the rest of the print?
Try printing a temperature tower, and see what happens. The Getting Started Guide has some pre-generated GCode for all 4 models. See section 4, FINETUNE YOUR SOFTWARE SETTINGS TEST-SECTION.
That would be amazing if you could get a filament that would change colors depending on print temperature.
I’m sure someone has already thought of this and if it’s at all possible it already exists.
-S
Yea I know right, I found temperature dependent color changing filaments. Not quite print temp specifically, but it seems like it’d be a relatively small step for that, then you could print images using the filament temp.