We have added granular Manganese Dioxide to our RO-30 to give it a "reduction" look . The speckles will "bleed" through a clear or opaque glaze.
% Shrinkage
C/06
=7.0
C/1
=10.2
C/6
=11.7
C/10
=13.3
%Absorption
C/06
=10.4
C/1
=4.0
C/6
=2.0
C/10
=0.7