## filler

Also contains definition of: grist
https://doi.org/10.1351/goldbook.F02363
Filler (also called grist) is a petroleum- or coal-based @C01142@ fraction of a green, @C00842@ or formulation. Coarse particles, $$>0.425\ \mathrm{mm}$$, are sometimes referred to as tailings; fine particles, $$<0.074\ \mathrm{mm}$$, are referred to as flour. @G02684@ flour is also used as a filler.
Source:
PAC, 1995, 67, 473. (Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)) on page 489 [Terms] [Paper]