You don't want anything leaching out, but that's pretty much it.

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Jenkins evinces no eye for visual melody and tricks up the images by leaching out most of the color, hinting at meaning but achieving merely a greeting-card cuteness.

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Properly seasoned cast iron will provide much the same results but without leaching out the perfluorochemicals non-stick surfaces are made from or the toxic fumes that studies have shown hot non-stick cookware can emit.

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It was argued that nickel ions leaching out of the coins as they corroded would cause hand eczema in the 15% of women and 2% of men who are already allergic, and might sensitise more of the population to nickel as well.

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Rather, as a consequence of injecting water and sand into the shale formation to crack the rocks so gas and oil will flow, massive amounts of waste water comes back to the surface with significant amounts of contaminants as a result of leaching out salt, heavy metals and trace amounts of radioactive materials from the rock formation itself.

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Dr Peter Hawker, chairman of the BMA's central consultants and specialists committee, said the scheme would lead to "private companies leaching funds out of the NHS for profit".

BBC: News | Health | Conference diary: Monday