Microdol is a pure white dolomite filler. H60 is a very fine powder and is ideal as a general white filler for resin casting. The coarse grade is also widely used for producing marble finishes with Jesmonite, cement and plaster, etc.
Microdol is a white crystally material, it has a sparkle to it, a bit like sugar - making it ideal for producing white marble effects. Being pure white it maintains the colour when pigments are used.
As a general purpose filler for Resin Casting it will reduce exotherm and shrinkage allowing for larger castings. It is also often added to reduce the cost of resin casts, as can be added at 40-50% by weight.