Paulette Carr on wed 1 feb 06
In reading Cushings Handbook on slips, he suggests adding 0.25% of a
deflocculant (i.e., Calgon, sodium silicate, Darvan, etc.) to the
water before adding the dry materials. Is this 0.25% by weight or
volume? Since Darvan 7 is a solution, do I just weigh or measure the
solution as if it were the "pure" deflocculant without first
determining what the concentration of the solution is, or do I need
to know the concentration of the Darvan 7 solution? I measured the
specific gravity of the Darvan 7 solution ... 1.16g/cc. Now what?
I am sure that there is a simple answer. Thanks, in advance, for
your help!
Regards,
Paulette Carr
Paulette Carr Studio
Member/Potters Council
St. Louis, MO
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