I try to achieve foil nearly black color with very glossy reflection and gold separations. This blue mated reflection comes from gray glossy layer in shader and from environment. It's simply to fix it, but packshot will lose this "plastic like" behavior. It's not from any kitchen scene. I made collections for some archviz in future and post here some blends from older projects that I find in my old stuff.

Ah, I see, you've done it that way so that the gold parts will leap out :)

That's give you possibility to separate gold fonts in packshot. This is much flexible if you want make gold logotype for example. :)