I have a design with some text that will sit on a matte black background (think "black & gold" as the goal). I want the design to be reflective - or a metallic-gold effect to stand out over the the otherwise flat black background, similar to gold-leaf prints you might find on business cards or a wine bottle label.

A few print shops for labels use a silver BOPP permanent material to achieve metallic effects (with an option for a matte overlaminate finish, or glossy), where you leave a design-punched-out layer of white (ink which is used as a "primer" to cover the silver effect for other artwork layers) to cover the silver material for areas that don't need to be "metallic". Then you can use the matching colored design on a different layer to tint the silver punched-out area (either directly on the artwork layer, or as it's own layer above the white one) so that it has that metallic effect.

With blue, for example, it would appear shiny "metallic" blue. I'm going for a gold metallic effect similar to the gold-leaf appearance. The print shops require all colors to be CMYK, but I'm not sure what the best color mixture is to use for the bright gold metallic effect I'm looking for, if it's not just straight 'yellow' (100% Y).

Anyone have any suggestions for achieving this? There are color guides you can find online for emulating the gold effect, but I'm not sure it's the same thing as if I wanted it to appear golden when printed over the silver material. Any advice would be appreciated. Thanks