/diy/ - Do It Yourself

>>2756920
>190C
eg: this is two components that fit together, printed separately at different temperatures. Both show the first layer surface thats in contact with the bed when printing. You can see the difference in surface quality due to temperature: left is too hot, right is cooler, and just right (190 in this case). Note the lines arent parallel, so disregard/reconcile that minor visual difference.
Note that even the nicer right sample has little specks of slightly-whiter in its extrusion; that is almost certainly due to water absorption, or 'impurities' of some kind (maybe just cheaper base material) in the PLA, when it hits the hotend it expands - often you can actually hear it - at 190 its still fairly tame but as i get up past 210 it becomes more vigorous in its expansion, and at a microscopic scale probably looks almost spongey due to the holes in it.
Even when fresh from the bag; this filament must be printed ~190-200ish, so evidently it has an innate water/impurity content. Almost certainly becasue it was hot/wet in China when this filament was packaged in 2018. The bag I just opened was still airtight, and yet I still cant print the PLA too hot.