This is a dual colour filament, it literally means the filament strand is composed of 2 simultaneous colours.
This is a roll of Gold & Silver mix. The filament is 2-sided.

Silk PLA gives true metallic shine to it without having to polish it or post-process it.
Esun first had Silk metal PLA in 3 different colours – Gold, Silver, & Copper.
Then the range was expanded to include Rose Gold & Rainbow metallic (rainbow is where the colour of the filament gradually changes).

And now we have this dual filament concept with twin sided filament. So the object gets a colour & texture you would not be able to make with any other technology, & painting it in such a way would be an outright headache. 3d printing with dual-colour & tri-colour filaments is a lot of fun, especially for art pieces, kids toys, or school projects.

Its the closest we’ve ever come to a PLA that actually shines like a real metal without having any metal in it.
The shine also hides the print layer lines to a greater extent than other colours.

This is the same material as the Esun Silk metal Gold or Silver colour – its both those rolled into 1.