Why does my gray image came out green when I laminate it with 3420?

Luke from Sticker Dude has been laminating using Series 3420 and it has been coming out with a green tint. There is questions on if we have made any recent product construction changes that would cause this?

Arlon laminate has a hint yellow. With color addition of yellow on gray= green.

Solution: Create a profile that takes into account of the laminate yellow contribution to the final gray.