The Nordson® Ink-Dot I.D. system identifies which spray machine coats each can on the line. The system applies a small dot of ink on the bottom of each can as it enters the spray machine. A different ink color is used for each machine on the coating line, so the source of unacceptable coatings can be immediately identified. There is no need to shut down all machines on the line to determine which machine is producing the defect.