I'm not a novice google searcher, but I can't seem to find an answer
at all.  What is the definition of soap milling, and the specific
meaning of french-milled, hard-milled, cold-milled and triple-milled soap? 
Everyone sells them but nobody defines them.

Hello there

The basic definition of soap milling is shredding it apart with
rollers and putting it back together again in high pressure presses. 
In "triple-milled" soap, this process is repeated three times.

"Milling helps to distribute the color and fragrance evenly throughout
the soap, makes the texture smoother and makes the final bar of soap
harder and longer-lasting." - quote and information from Suds Report -
Bath & Body Product News and Reviews
http://www.sudsreport.com/Newsletters/06-02_newsletter.htm - - This is
from the June edition so you may want to copy it if you need it before
July's pages take over.

Cold Process or Cold Process Milling - A method of soap making without
utilizing any external heat source.
http://www.ccnphawaii.com/glossary.htm - Soap Making Glossary for the
Modern Soap Maker

Hard Milled Soap is "...a lathering soap which has been compressed to
remove air, allowing for a longer life than regular soaps."
http://www.rivieraconcepts.com/glossary.html - Riviera Concepts Inc. : Glossary

French Milling is a combined heat and cold process where the roller
temperatures are alternately controled with hot and cold water.  The
result is a milder and longer lasting bar.
http://www.vermontsoap.com/opera.html - "Vermont Soap Organics - What is Soap?"

I hope the above helps with your sudsy research.

Search - google
Terms - soap-milling defined - with a separate search for each type

If I may clarify anything before rating the answer, please ask.

Cheers
Digsalot

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Clarification of Answer by digsalot-ga on 01 Jul 2004 13:28 PDT

Thank you for the kind words and the extra.  We look forward to being
of service whenever you need us.

Cheers
Digs < - a researcher with his own bubble blowing rubber ducky.

The answer was concise and complete, with references for further
reading.  I appreciate that.  Sorry for my slow response in rating
your answer.