Richard
I erased the copyright on an unplasticized deck using using ordinary ink and graphite erasers. It worked quite well but was more trouble than it was worth. Anyhow I like my Smith-Waite Centennial better, copyright and all.
Surely you don't mean pixellation as in low resolution computer graphics, do you? There is no trace of that in my Smith-Waite Empress or any other card.......for example, the Empress card. 1971 the pillow behind her is faintly striped, 2009 the pillow is solid. 1971 face is smooth, 2009 face is pixelated......