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computer displays Cadmium damages the nervous system and is toxic in high doses The
computer displays. Cadmium damages the nervous system and is toxic in high doses. The
relevant TCO'99 requirement states that batteries, the colour-generating layers of display screens
and the electrical or electronics components must not contain any cadmium.
Mercury**
Mercury is sometimes found in batteries, relays and switches. It damages the nervous system
and is toxic in high doses. The relevant TCO'99 requirement states that batteries may not contain
any mercury. It also demands that mercury is not present in any of the electrical or electronics
components associated with the labelled unit. There is however one exception. Mercury is, for the
time being, permitted in the back light system of flat panel monitors as today there is no
commercially available alternative. TCO aims on removing this exception when a Mercury free
alternative is available.
CFCs (freons)
The relevant TCO'99 requirement states that neither CFCs nor HCFCs may be used during the
manufacture and assembly of the product. CFCs (freons) are sometimes used for washing
printed circuit boards. CFCs break down ozone and thereby damage the ozone layer in the
stratosphere, causing increased reception on earth of ultraviolet light with e.g. increased risks of
skin cancer (malignant melanoma) as a consequence.
Lead**
Lead can be found in picture tubes, display screens, solders and capacitors. Lead damages the
nervous system and in higher doses, causes lead poisoning. The relevant TCO'99 requirement
permits the inclusion of lead since no replacement has yet been developed.
* Bio-accumulative is defined as substances which accumulate within living organisms.
** Lead, Cadmium and Mercury are heavy metals which are Bio-accumulative.
TCO'03-Ecological requirements for personal computers (TCO applied model only)
Congratulations!
The display you have just purchased carries the TCO'03 Displays label. This means that your
display is designed, manufactured and tested according to some of the strictest quality and
environmental requirements in the world. This makes for a high performance product, designed
with the user in focus that also minimizes the impact on our natural environment.
Some of the features of the TCO'03 Display requirements:
Ergonomics
Good visual ergonomics and image quality in order to improve the working environment for the
user and to reduce sight and strain problems. Important parameters are luminance, contrast,
resolution, reflectance, colour rendition and image stability.
Energy
• Energy-saving mode after a certain time – beneficial both for the user and the environment
• Electrical safety
Emissions
• Electromagnetic fields
• Noise emissions
Ecology
• The product must be prepared for recycling and the manufacturer must have a certified
environmental management system such as EMAS or ISO 14 000
• Restrictions on
o chlorinated and brominated flame retardants and polymers
o heavy metals such as cadmium, mercury and lead.
The requirements included in this label have been developed by TCO Development in cooperation
with scientists, experts, users as well as manufacturers all over the world. Since the end of the
1980s TCO has been involved in influencing the development of IT equipment in a more user-
friendly direction. Our labelling system started with displays in 1992 and is now requested by
users and IT-manufacturers all over the world.
For more information, Please visit
www.tcodevelopment.com
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