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due to the bio-accumulative* processes. Flame retardants have been found in human blood and
researchers fear that disturbances in foetus development may occur.
TCO'99 demand requires that plastic components weighing more than 25 grams must not contain
flame retardants with organically bound chlorine and bromine. Flame retardants are allowed in
the printed circuit boards since no substitutes are available.
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.
TCO'99 requirement permits the inclusion of lead since no replacement has yet been devel-
oped.
Cadmium**
Cadmium is present in rechargeable batteries and in the color generating layers of certain computer
displays. Cadmium damages the nervous system and is toxic in high doses.
TCO'99 requirement states that batteries, the color 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, Mercury damages the nervous
system and is toxic in high doses.
TCO'99 requirement states that batteries may not contain any Mercury. It also demands that no
mercury is present in any of the electrical or electronics components associated with the display
unit.
CFCs (freons)
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 consequent increased risks of skin cancer (malignant melanoma).
The relevant TCO'99 requirement; Neither CFCs nor HCFCs may be used during the manufactur-
ing and assembly of the product or its packaging.
*Bio-accumulative is defined as substances which accumulate within living organisms.
**Lead, Cadmium and Mercury are heavy metals which are Bio-accumulative.
To obtain complete information on the environmental criteria document, order from:
TCO Development Unit
SE-4 94 Stockholm
SWEDEN
FAX Number: +46 8 782 92 07
E-mail (Internet): development@tco.se
You may also obtain current information on TCO'99 approved and labelled products
by visiting their website at: http://www.tcodevelopment.com/
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