HP LaserJet 3100 All-in-One Printer series - Manual (Page 251)

250 A Specifications EN
Toner consumption
Depending on the type of printer driver you have, you may be able to
select a “draft” mode which uses about 50% less toner, thereby
extending the life of the toner cartridge. This is only available using
printer driver properties when printing or making copies from the
software.
Paper use
Depending on the type of program you use, you may be able to print
2 or 4 document pages on each printed page. This “N-up” printing
practice and the printer’s manual duplex capability (two-sided
printing) reduce paper usage and the resulting demands on natural
resources.
The design of this HP LaserJet printer facilitates the recycling
of:
Plastics
Plastic parts have marking according to international standards that
enhance the ability to identify plastics for recycling purposes at the
end of the product’s life. The plastics used in the product housing and
chassis are technically recyclable.
HP toner cartridges/photoconductive drum
In many countries, this product’s toner cartridge/drum can be
returned to HP using the prepaid shipping label and instructions
included inside each new HP toner cartridge box. If your country is
not listed in the recycling guide, call your local HP Sales and Service
Office (see appendix B) for further instructions.
HP cartridge recycling program
Since 1990, the HP LaserJet Toner Cartridge Recycling Program has
collected more than 12 million cartridges that otherwise would have
been discarded into landfills or similar facilities. Once a cartridge is
returned through the prepaid return program, it is disassembled, and
reusable components and the plastic housing are cleaned and
inspected for quality conformance. After passing strict inspection
procedures, materials such as nuts, screws, and clips are reclaimed
and used to produce new cartridges. Remaining materials are melted
down and used as raw materials for a variety of other products. Over
95 percent (%) of the weight of returned materials is recycled. For
more information in the U.S., call (1) (800) LASERJET [(1) (800) 527-
3753)] or contact the HP LaserJet Website at
http://www.hp.com.lj_supplies/recycle.html. International customers