marbling brushes
Fine bristle brushes, set in hard rubber and
secured in metal ferrules. They are generally from
3/8 to 1/2 inch in diameter. The larger brushes
are used for the ground color in drawn marbles,
while the smaller ones are used for the subsequent
colors. The bristles of marbling brushes should be
formed into a curved shape so as to give a freer
motion when dropping the colors.
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