DIN 55996-3
DIN 55996-3 Paints and varnishes - Stone chip resistance test for coatings - Part 3: Single impact test with free flying impact body
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 12/01/2009
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 12/01/2009