How do I make my HP Photosmart C6150 print on card stock?
Your printer is only rated for upto 24 lb. paper in the paper tray and up to 110 lb. paper in the photo tray. You can try printing on manual mode where you must load the paper yourself. If the card stock is over 24 lbs. it will not print. The printers are smart now-a-days and can detect when the paper is not correct. If a border is on the paper, we have a problem with the printer thinking the paper is not the correct size paper and will not print. We have not found a way around the problem as of yet.