What is this 1982 circuit board made of?

[dentaku]

I finally removed the shielding from an old General Instruments / Electrohome satellite receiver from 1982 (first IF Amplifier IF-I Made in Canada) and see that it's all this shiny metallic looking stuff. It almost looks like thick aluminum foil. I dabbed my flux pen on it and was able to solder to it quite well and of course all the components on this board are surface mounted to this material.
The back of this board is regular copper with green a coating.

What is this stuff?
Is it basically a big metal sticker transferred onto FR-4 like material?

[chrissmeuk]

Possibly FRP with copper. It looks like it has just been tinned after etching hence the appearance.

If you don't need it or it's duff, scratch some of the tinning with a flat blade and see if it's copper underneath.

[Mr.B]

Looks like roller tinned FR-2 to me...

[dentaku]

Aha.
Yup, I scraped the top layer off and it's copper underneath.

[Fank1]

I believe it was called REXOLITE used mainly for high frequency stuff.
Not a sticker, just plated copper after it was etched.

[vk6zgo]

I finally removed the shielding from an old General Instruments / Electrohome satellite receiver from 1982 (first IF Amplifier IF-I Made in Canada) and see that it's all this shiny metallic looking stuff. It almost looks like thick aluminum foil. I dabbed my flux pen on it and was able to solder to it quite well and of course all the components on this board are surface mounted to this material.
The back of this board is regular copper with green a coating.

What is this stuff?
Is it basically a big metal sticker transferred onto FR-4 like material?

Just tinned copper---& the board material? FRP of some kind,bit different,& slightly cruddier than most.
"Very Electrohome",they used this board material in all their Picture Monitors,too.

[dentaku]

I finally removed the shielding from an old General Instruments / Electrohome satellite receiver from 1982 (first IF Amplifier IF-I Made in Canada) and see that it's all this shiny metallic looking stuff. It almost looks like thick aluminum foil. I dabbed my flux pen on it and was able to solder to it quite well and of course all the components on this board are surface mounted to this material.
The back of this board is regular copper with green a coating.

What is this stuff?
Is it basically a big metal sticker transferred onto FR-4 like material?

Just tinned copper---& the board material? FRP of some kind,bit different,& slightly cruddier than most.
"Very Electrohome",they used this board material in all their Picture Monitors,too.

It's kinda lumpy and you can see the fibers in it so it is strange looking stuff. It also smells very different than regular boards when you cut into it. Regular boards smell like horse manure but I'm not sure if that's the material itself or if it the smell of green solder mask.