I printed this vase in iceBlue PLA.

3D Printing
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1

I printed this vase in iceBlue PLA.
It starts “normal”, then halfway it is lighter of colour, then it gets back to “normal” and then lighter again.
Nozzle temp is rock solid all the way through, why the colour variations?

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f10a774613b27593861bc2a1b97f778c.jpeg2048×1152 288 KB

2

Just a guess or two; compostion and/or diameter of the filament changed slightly. Or very thin film forming in the extruded reduced flow, thinning the vase walls?

3

Could be low quality filament with inconsistent coloring.

4

I’ve gotta agree with +Daniel Bentley, low quality filament with inconsistent coloring. We’ve fought the company that extrudes our branded filament about this. Towards one end of a 1kg roll, colors are sharp and deep. Towards the end, they start getting somewhat transparent.

5

Is the vase the same thickness all the way up? Maybe you’re seeing a change in the infill pattern.

6

For that print it looks pretty good. If only it was intentional. Could a draft cause cooling at different rates along different z offsets lead to this effect?

7

@ThantiK Is spot on. There is a reason industry uses 1 meter long screws or longer as it is to properly mix either colors or fully mix additives. They have to meet pantone color swatches. No room for error.

8

@Tom_Martz in countries that care. But if it comes from China, India, etc there’s no telling on the quality (not that it’s automatically bad either)

9

thanks for the reactions.
The filament is good quality, the diameter is consistent at 1,74mm.
I can not see any discolouring, but it is hard to see as it is light blue translucent. I did encounter the differences in colour with different nozzle temp, but then it was intended. now the nozzle temp was steady.
Our machines are enclosed (CartesioW1) and so there are no drafts.
So I am going to look into the possibility of a difference in volume output.