When printing on untraditional paper your printer may experience smudges, un-even or crooked text, and/or text that runs off the edges of the paper.  Your printer may be printing fuzzy, blurry, and/or other faint text because of dirty print heads. 

All modern printers have some type of printer cleaning, self-test, and/or diagnose mode that can be performed to check and clean the printers print heads and other internal equipment used to print.