>>60889187
>I was speaking in reference to the goldbacks, which is basically laminated metallic glitter
It's not glitter, it's vacuum deposited gold film that goes through an iintaglio process where the image is embossed and printed so that if you look at the reverse side, you see the embossed image in reverse, but no ink. The front face is perfectly smooth from the laminated polyester layer, but the backside has the subtle texture of the embossing. Here's an image of the front and back of the Goldback.

The larger denominations are physically larger and heavier.

The gold content can be verified nondestructively via an XRF tester which I've personally done with my 5 Goldback note.