Thinned describes the condition of a skillet that has been reduced in thickness by paring away the cardboard backing. This treatment of skillets has been heavily practised by some collectors and such items are considered to be rendered damaged and incomplete. It is on a par with cutting or trimming matchbox labels. Some skillets have been printed on the inside face and when a skillet is thinned this information is lost. Some collectors also consider the type and colour of card a variation and again this information is lost on a thinned skillet.