Mica flakes are made made by a special process from sillicate minerals. They have a similar shine and reflectivity to metals but without a lot of the drawbacks! Mica flakes can be added to a wide range of mediums, mixed into epoxy resin pours or simply sprinked onto a tacky surface to add a metallic lustre.
The larger size of these flakes makes for bright reflective effects, but if something else is required they can be crumbled down to smaller sizes.
