Material of Alphacool NexXxoS 1260's channel

[AlphacoolCustomer]

Hi,

I recently bought your Alphacool NexXxoS 1260 radiator and found that under the black paint of the channels is a shiny white material, not copper color. Please see tha attached image.

Could you please explain what and why?

Thanks,

 

[Vanzin]

HI,

the channels of our radiators are made out of copper.

 

[AlphacoolCustomer]

Hey thanks I know I can trust Alphacool!
But a bit curious about the shiny coating behind the black paint as in the image. What is it?