AMMO by MIG Pigments - Fine Pigment Powders for Modelling
Color: White

From the Manufacturer:

A pigment color can be used alone to create ash or snow effects, or in combination to lighten other pigment colors. High quality Pigment, superfine and made from natural products for exclusive use in modeling. This color is specially designed to make effects in your models using the techniques that Mig Jimenez created for more than a decade. Use it alone or in combination with other AMMO products.