🚀 go-pugleaf

In sci.engr, quopingl@cs.umr.edu (Quo-Ping Lin) writes:
>Hi Netters:
>Got a question for everybody.  In sand casting, people conventionally call
>the sand as "green sand."  Dose anyone knows where the word "green" came
>from?  It looks black for me.

I'll take a crack at this although it's been 30 years since I've been
exposed to the topic.  As I recall, "green-sand" is sand containing a small
amount of clay and moisture to permit packing and provide some strength.
The term "green" thus refers to new or not fully processed.  "Dry-sand",
on the other hand, is sand and linseed oil or other resins that is packed,
then dried and/or baked to give much stronger properties such as needed
for cores.


-- Bob

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Robert J. Hanners         "My comments; only mine."          *DIASTOLE* 676673
CD, NSWC, Annapolis, MD                              hanners@oasys.dt.navy.mil