I'm currently using a 452dw to print on card stock. When using my cheap 110lb. card stock, the text comes out nice and clean. When using a slightly thicker and "better quality" card stock that I purchased from a print shop, text comes out fuzzy. Of course, the fuzziness is only visible when under magnification, but you do see the difference with the naked eye. So, is it the finish on the surface of the card stock or the thickness of the stock that makes the text print fuzzy?