HP Color LaserJet 4730 Multifunction Printer series - Manual (Page 383)

CAUTION To avoid damaging the MFP, use only transparencies recommended for use in
HP LaserJet printers, such as HP-brand transparencies. (For ordering information, see Part
numbers .)
For more information, see Transparencies .
NOTE Choose transparencies in the printer driver.
ENWW Print media specifications 363