HP J540 Part Numbers A B

Refilling Policy

Caution The ink in the print cartridges has been carefully formulated

by Hewlett-Packard to ensure superior print quality and
compatibility with the printer. Damage to the printer resulting
from modifying the print cartridge is not the responsibility of
Hewlett-Packard.

Hewlett-Packard does not support the refilling of print car­tridges. Hewlett-Packard cannot guarantee the print quality
from refilled print cartridges.

capacity print cartridge may result in a sudden loss of ink from
the print cartridge

capacity black ink or color ink print cartridges is not covered
by the Hewlett-Packard warranty or customer service
agreements.

. Printer damage caused by refilling high-

Attempting to refill the high-

Part Numbers

Part Numbers for HP Print Cartridges and Color Kits

Item Part Number Description

Print Cartridges 51625A

51626A High Capacity Inkjet Print Cartridge

Color Kits

1. The Color print cartridge is compatible with the following printers: HP DeskJet 500C, DeskJet 540,
DeskJet 550C, DeskJet 560C, DeskWriter C, DeskWriter 540, DeskWriter 550C, and DeskWriter
560C printers.

2. The Color Kits include a color print cartridge and a print cartridge storage container. The storage
container can hold one black or one color print cartridge.

3. For more information on Color Kits, refer to: Product Information/Accessories/Color Kit Information
(HP DeskJet 540 and DeskWriter 540 printers).

2, 3

C3067A U.S., Asia
C3069A Europe
C3276A International English, French,

1

Color Inkjet Print Cartridge
(Cyan, Magenta, and Yellow Inks)

(Black)

Spanish and Portuguese

Print Cartridge Specifications

Specification Hewlett-Packard Print Cartridges

Type Plain paper drop-on-demand

Thermal Inkjet printing

Print Cartridge Life

51626A (Black)
51625A (Color)

Number of Nozzles

51626A (Black)
51625A (Color)

Resolution 300 dpi

1. The 51645A print cartridge life is based on an 8 in. x 10 in. printable area with a 5% printing
density.

2. The 51641A print cartridge life is based on an 8 in. x 10 in. printable area with a 15% printing
density. The printing consists of 10% composite black and 15% of the following colors: cyan,
magenta, yellow, green, red and blue.

1

2

800 pages at 5% density
150 pages at 15% density

50 Nozzles
48 Nozzles

Thermal Inkjet Technology

4

The HP DeskJet printer family uses Thermal Inkjet II (TIJ II) technology.
This technology centers on a disposable print cartridge which propels ink
out of 50 nozzles (48 nozzles on the color print cartridge). The basic
principle of TIJ II is to apply heat to a tiny measure of ink until it expands
and is propelled through a nozzle.

This is achieved by first filling a small reservoir, known as the firing
chamber, with ink. The next step is to heat the ink with a thin-film resistor
layered above the firing chamber. As the ink heats up, it expands to form a
bubble. As the bubble continues to expand and burst, it is forced through
the nozzle located below the firing chamber.

This process is repeated up to 5,000 times per second and creates
residual heat in the resistor which must be removed. A layer of silicon
placed above the resistor transfers the residual heat from the resistor.

Cooling Layer of Silicon

Heated Thin-Film Resistor

Firing Chamber

Nozzle

Propelled Ink Droplet

212161

Print Cartridge Safety

Ink used in the print cartridge does not pose a health hazard to customers.
During the development of ink formulas, all the ingredients are screened
and researched for known potential health related issues. Only those
chemicals that meet or exceed worldwide safety and regulatory
requirements are used in HP inks.

If ink is accidentally ingested, contact the HP Health Line:

1 [phone] in North America.

From all other international locations the HP Health Line can be reached
by calling:

1 [phone].

For health related issues, this line is staffed 24
hours per day.

Material Safety Data Sheet (MSDS)

A Material Safety Data Sheet (MSDS) is available for the print cartridges.
The MSDS includes product identification, characteristics of the ink, and
precautions for handling and use. You can request a MSDS at the
following address:

Hewlett-Packard Customer Information Center
Department MSDS
19310 Pruneridge Avenue
Cupertino, CA 95014
Mailstop 49AS

Telephone [phone]
Ask for Department MSDS (6:00 AM to 5:00 PM Pacific Time)

The Material Safety Data Sheet is also available from the following
sources:

HP forums of electronic bulletin board services
HP FIRST
Customer Support Centers

Refer to “Service and Support/Resources” for access to the above
resources.