PRINTERS CLEARED OF TONER DUST HAZARD , BUT ……….

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PRINTERS CLEARED OF TONER DUST HAZARD , BUT ……….

 user 2008-12-03 at 10:23:24 am Views: 65
  • #20597
    http://www.techradar.com/news/computing-components/laser-printers-cleared-of-toner-dust-hazard-490583
    Laser printers cleared of toner dust hazard ,But ultra-fine particles still causing concern
    Office
    workers can breathe easily now that German scientists have shown that
    laser printer emit ‘hardly any’ particles of black toner, a potential
    carcinogen.A previous study by the Queensland University of Technology
    found that printers emitted clouds of particles that were five times
    higher than levels outside, which they assumed could include
    potentially dangerous toner dust.However, researchers at the Fraunhofer
    Wilhelm Klauditz Institute in Braunschweig looked into exact
    composition of the emissions.”Some printers do emit ultra-fine
    particles made of volatile organic-chemical substances,” says WKI
    Professor Tunga Salthammer. “But one essential property of these
    ultra-fine particles is their volatility, which indicates that we are
    not looking at toner dust.”

    Toner deaf
    The scientists
    confirmed their conclusions by testing a range of printers without any
    paper or toner in them – and still detected the ultra-fine
    particles.They concluded that the particles were coming from the
    printers’ fixing unit – a component that heats up as high as 220°C
    during the printing process in order to fix toner particles on the
    paper.Ultra-fine particles are produced by many household gadgets that
    have an electric motor or heating element – such as toasters – but
    little research has been done into their possible toxicity.In any case,
    say Fraunhofer boffins, there’s nothing to be done: “Our investigations
    show that as the ultra-fine particles are not emitted from a specific
    part of the printer, but also from the paper output, filters can only
    have a limited effect.”