IDM Instruments has released one of the first twin arm ink rub testers, manufactured for Yalumba Wines.
The tester has been designed for determining abrasion resistance of printed material, labels, folding cartons, and various other packaging materials that contain graphics.
The IDM twin arm ink rub tester is a motor driven device for moving a weighted test specimen over a printed or unprinted sample for a predetermined number of strokes. The stroke comprises of one to-and-fro motion of the test weight (either 2lb or 4lb).
The machine can perform such tests as dry rub, wet rub, wet bleed or transfer, wet smear or functional rub.
The significance of the ink rub procedure is to determine between strong and weak ink films as well as their adhesion to container board and the container boards resistance to rubbing and scuffing.
Although having the same operation as the standard model, the new machine differentiates in the design. It features double-sided rub testing capabilities, compared to single front testing.
This benefits users as it speeds up the process time by enabling the testing for abrasion resistance on both front and back labels simultaneously.