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Spots on copying: Chk is there any marks on flat bed glass?,clean flat bed glass with wet cotton cloth, allow it for dry. Spots on printing: There is no particular reason for this issue. clean paper path with wet cotton cloth & allow for dry..
Create a mask or layer for each spot color you want to print using only black. When printing spot colors anything on the mask in black will be printed in the spot color. For foils, print a couple of layers of black ink before you print the foil to get a very good effect. Remember to check the overlay option so the paper doesn't get ejected.
If you're getting spots on the prints, run the Remove Ink Smears routine in the maintenance. It will clear the ink from the preheater. User packing tape to pull dust off of pick rollers. It's easy to unclip the unit and roll it on a piece of tape to remove dust.
most likely you have a flat spot on the roller.
that is exactly what is going to happen, when the paper hits the flat spot or a low spot. the paper stops and skips. them the print is coming out smeared.
you can get a repair kit or replacement roller from HP.
If you have a laser printer, it is probably going to be a problem with the fuser. That is not something that you want to attempt to fix yourself, unless you are very technically inclined.
If it is an inkjet printer, you may have a leaky ink cartridge along with other problems. The leaky ink cartridge can cause the ink spots. However, with an inkjet printer, I'm not really sure what will cause it to print words on top of words unless you have a paper feed problem and the paper is not advancing at the speed it normally would.