PCL fonts can be supplied by two forms: cartridge font and soft font. Cartridge font plugs into a font cartridge slot in the printer. Soft fonts are transferred from a host computer into the printer's user memory (RAM). Soft fonts provide the maximum flexibility - you can download, make permanent or remove a soft font. After a soft font is downloaded and made permanent, the font resides in the memory until you explicitly send “remove” command or in the event of a power loss. Since the soft fonts reside in the RAM other than ROM, they can not survive a power loss. Thus, it is a good idea to download the soft font at the beginning of each print job. Each time the old font is replaced by the new one, and the font reloading only takes 1 to 2 seconds depending on the font size.