The chicken egg shell, raw material (Gallus gallus
domesticus, L.), Hy-line white eggs were obtained from Sohovos
AB Brasil – Sorocaba – SP – Brazil eggproduct industry. The
calcium carbonate was produced after it had gone through
stages of: wash, dry, grind and purification. The details on the
treatment of the egg shells are suppressed because the Sohovos eggproduct industry is in process of intellectual property submission request.