Posted by claudia on Monday, September 24, 2007 at 11:45pm.
I think you need to start by defining the problem a little tighter. What do you mean by 'harmful' and 'harmless'. A place to start might be by finding out what is meant by the terms 'Hazard' and 'Risk' as these have specific meanings and are often mis-used, especially by the press.
This then might lead you to decide for whom or what you are tying to minimise the risk.
To take an example. One way to immobilise lead is to have the metal as a brick and perhaps paint it with gloss paint. It is stable in this form and unless the brick is chewed the lead is very unlikely to be injested. The paint stops the small transfer to hands that might occur during hamdling. One of the hazards that remains is that lead is dense and the brick may have considerable mass so could break a foot if dropped.
Hope this helps.
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