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Painting w/ rocks - toxic?


Date: Wed Aug 01 2001 - 16:28:42 PDT

In a message dated 8/1/01 3:52:04 PM Central Daylight Time, writes:

<< The easiest to find and most permanent pigments are pieces of soft stone
 and minerals. >>

Someone told me that using natural rocks could expose the students to lead and
other toxic materials. Do not know is this is true. Just passing it on.