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The green shade could be contaminated raw plastic pellets, like was mentioned before. That would explain all the different parts having same issue.
Usually if the injection molding machine is contaminated you get some swirls of color not uniform. After a while of running, the green would be removed from machine because of all the new correct color plastic pushed through.
Could also be mold release chemicals contaminating it I suppose. But once again that would be hard to probably get uniform over whole part.

I set the right ball cup out in the Texas sun for 2 days, the left one stayed indoors.
We may have hope for at least the ball cups. They are on white printing paper.

Chuck

radioactivity wrote: ↑Sun May 05, 2019 8:42 pm I set the right ball cup out in the Texas sun for 2 days, the left one stayed indoors.
We may have hope for at least the ball cups. They are on white printing paper.

Chuck

If that's what results can be achieved by exposing the green parts to the sun, it looks like our UK friends miss out again...