We understand that in Germany there is a general ban on the use of open-topped flat bed laser cutting machines for processing plastics.

However, although we would strongly advocate using a fully enclosed laser cutting machine for such work, common sense dictates that the risk involved in using an open-topped machine will depend on which plastic is being cut, how much of it is cut and how effective the fume extraction is. In view of the fact that little is known about the possible long term effects of breathing in the often complex mix of chemicals, generally a mix of vapour and highly-breathable sub-micron particles, we can only assume that the fume is hazardous and that a highly effective (and powerful) above and below-table fume extraction system is essential.

As well as possible health consequences for long term exposure there are acute symptoms too: we occasionally encounter machine operators complaining of sore throats, headaches and other flu-like symptoms after cutting certain types of plastic. In this context, the November 2003 decision of a US jury to rule against BOC in a case that linked fumes from welding rods to Parkinson’s disease provides a salutary warning. Whilst it is easy to be cynical about the litigation system in the USA, it is probably far too early to make the implied link. Nevertheless, this news item does at least emphasise the potential problems that may arise from long-term exposure of workers to anything having unknown effects; including laser fume.