Random color in materials to not change when I copy the objects I have 100 balls with random colors. The nodes looks like this


When I copy these 100 balls (no matter if I use Shift + D or Ctrl + C) the color on the new 100 balls is different (that's what you should expect since the material has that randomizer in nodes). 

But I need the color to be the same as it is on the original 100 balls.
How can I achieve that?

Maybe I can fixate the material somehow?
As Carlo's comment suggested, you could bake the color onto a texture.


Activate the Texture Atlas Addon.
Add an empty image texture.
Select all objects and unwrap them using the texture atlas addon.See the texture atlas documentation for more instructions on this addons usage.
Bake the Diffuse Color only using very few render samples!
Replace the Object Info random output with the image textures output.