What is the size of the smallest visible gold particle?
Does anyone know? I did a little research on it and found that
http://www.ganoksin.com/gnkurl/ep811l sells gold powder SG 19.3 (as
well as gold oxide powder and gold acetate powder). They say the size
is as low as -325 mesh which is about as fine as silt. -325 means the
size is 44 microns or smaller and a micron is 1/1,000,000 mm.
A practical application might be in ceramics if you wanted to
sprinkle gold dust on your glaze. What size would you order from
Theodore Gray writes in “The Elements” (page 182) that gold leaf is
500 atoms thick and is picked up with a hair brush made of red
squirrel hair (he does not say what to do if there are no red