Did you use acetone or is this unfinished? PLA or ABS? Support material necessary and if so single mat'l or dual? Also, seeing a lot of bubbling or other imperfections in the top layer which I assume extends throughout. Are you keeping your filament in an airtight plastic bag with silica packs inside? Do you experience popping or other imperfections that suggest your flow rate through the nozzle may need adjustment? The other factor I wonder about is if your printer is a closed-box style or if it's an open style and if open, are you operating the machine where there is any sort of airflow whatsoever? Someone walking by in the room is enough to screw with the way the plastic sets.
The "imperfections" are part of the lithophane the different thickness is what creates the image when light shines through it, what you think is bubbling is actually stars once illuminated
yes
Did you use acetone or is this unfinished? PLA or ABS? Support material necessary and if so single mat'l or dual? Also, seeing a lot of bubbling or other imperfections in the top layer which I assume extends throughout. Are you keeping your filament in an airtight plastic bag with silica packs inside? Do you experience popping or other imperfections that suggest your flow rate through the nozzle may need adjustment? The other factor I wonder about is if your printer is a closed-box style or if it's an open style and if open, are you operating the machine where there is any sort of airflow whatsoever? Someone walking by in the room is enough to screw with the way the plastic sets.
PLA, raft only
The "imperfections" are part of the lithophane the different thickness is what creates the image when light shines through it, what you think is bubbling is actually stars once illuminated
Wow. Can't believe I didn't see that at first!
I used to do print lab management testing reverse-engineered Stratasys protocols and other materials testing, so I guess I fell back on that.