Posted by synapticaxon (02/22/07 04:53 PM)

Egg shells are ~95% CaCO3.

Beware that if you utilize calcium oxide (CaO), the reaction with water is exothermic producing Ca(OH)2.

Hydrated lime is available from feed stores/mills but also contains other oxides in small quantities such as MgO.

You don't want to breath this dust.  Wear a mask.

Edited 2/22/2007 4:00 PM