James M. Brown
manufactures a complete range of cadmium pigments from a greenish
yellow through orange and red to deep maroon. As well as offering
a range of standard pigments on its shade card, JMB offers a matching
service against pigments which customers may already be using.
JMB cadmium
pigments are manufactured using very high purity raw materials
and all batches undergo special treatment during processing which
enables them to comply with special requirements e.g. those of
the Council of Europe for pigments in food-contact plastics.
These products
also comply with the requirements of the US "TCLP" and are not,
therefore, classed as being hazardous for disposal in the USA.
The European
Commission has completed the first comprehensive risk assessment
of cadmium pigments and has concluded that they produce no significant
risk either to man or to the environment.
The
manufacture and supply of cadmium pigments by JMB is covered by
a formal quality system conforming to ISO 9001 (2000) with BSI
QA.
Applications:
Plastics
(general)
Cadmium
pigments have inherent high temperature resistance because of
their method of manufacture and may therefore be used routinely
in polymers which are processed at or above 300șC e.g. polycarbonate,
nylons and PTFE. Further, because of this high temperature resistance,
all moulding sprues and off-cuts can be recycled whereas an
organic may already be starting to undergo decomposition during
moulding and be unable to withstand further heating.
Toys
The use
of colourants in toys is controlled in the EU by European standard
EN 71 part 3. JMB has carried out tests on a wide variety of
plastics moulded with up to 1% of its full-strength cadmium
pigments. In all cases, the amount of cadmium extractable from
the moulded article was at least a factor of ten below the maximum
limit set in EN 71 part 3.
Artists'
colours
Cadmium
pigments have long been the standard against which other pigments
are judged by artists and they continue to be the only choice
for top-quality oil and water colours.
Ceramics
The colouration
of decorative ceramic products such as on-glaze colours, porcelain
enamels for steel and glass colours for both flat glass, tumblers
and bottles often depends on the use of cadmium pigments. They
are the only pigments available for bright yellows, oranges
and reds (which continue to be such popular colours) which are
capable of withstanding the firing processes during manufacture
and application.
Cadmium
Pigments
