... -(with cobalt)one single dot : 8%,10%,50% 500pcs/can,three dots: 5%-10%-15%, 5%-10%-60%,10%-20%-30%, 20%-30%-40%, 30 ... %-40%-50%, 40%-60%-80%.......four dots: 10%-40%, 20 ... %-50%, 30%-60%.....six dots: 10%-60%.......any printing, size and RH can ...