We designed the packaging for premium skincare boxes using light Pantone colours (two are pastels, one is just light soild) + soft touch matte coating. After just two months of sitting on the shelves in retail the colours faded on the boxes. The client said they were never exposed to direct sunlight or under any lamps or similar - and I believe them because we have those same boxes in our office - so they went straight from the printers to the shelf in our office never exposed to anything but air, and the same thing happened.
The printers said that this just happens with these very light colours and there's nothing to do about it but change colours. Now they are arranging with our client that the boxes should be printed again but with darker colours, and they want me to choose new colours so this wouldnt happen.. Would that even solve the problem?
Why did this happen in the first place? Is there a chance we would have the same problem with darker colours (how much darker would they have to be?)? Is this about the type of coating or the type of cardboard (High Point 295g)? Would protective transparent foil over the products solve the problem?
Later today the printers also mentioned they will try to dry the colours a few more days before coating (they dried them all for a day before the matte soft touch coating)