Overhead transparency defects
Overhead transparencies can display any of the image quality problems that any other type of paper will cause, as well as defects specific to printing on transparencies. In addition, because transparencies are pliable while in the print path, they are subject to being marked by the paper-handling components.
Allow transparencies to cool for at least 30 seconds before handling them.
In the printer driver Paper tab, select Transparency as the paper type. Also, make sure that the tray is correctly configured for transparencies.
Check that the transparencies meet the specifications for this printer. See Supported paper weights and sizes. For more information on media specifications and ordering information, consult the HP LaserJet Printer Family Print Media Specification Guide. For the HP Color LaserJet 3550 series printer, go to http://www.hp.com/support/clj3550. For the HP Color LaserJet 3700 series printer, go to http://www.hp.com/support/clj3700. For downloadable manuals, select Manuals.
The transparencies you are using are not designed for proper toner adhesion. Use only transparencies designed for HP Color LaserJet printers.
Handle transparencies by the edges. Oil from fingers can cause spots and smudges on the transparencies.
Small, random, dark areas on the trailing edge of solid fill pages may be caused by transparencies sticking together in the output bin. Try printing the job in smaller batches.
The selected colors are undesirable when printed. Select different colors in the software application or printer driver.
If you are using a reflective overhead projector, use a standard overhead projector instead.
HP 3550 3700 Overhead transparency defects