“Rock powder” obtained from the physico-mechanical milling of natural clays with a high kaolinite content (>90%). Caolino DC is a very fine, high-purity, non-calcined kaolin that forms a thin white film on leaves and fruit, resistant to wash-off and reflective of solar radiation. The high level of micronisation guarantees uniform distribution, with no residues in the tank or atomiser nozzles.