^I want this for motorcycle helmets and other civilian-type armour. AGSC^ You want a cornflour motorcycle helmet ? :-) R On 2006-Sep 06, at 05:57hrs AM, Russell McMahon wrote: For a graphic demonstration of this sort of effect add water to a few tablespoons of cornflour until you have a paste on the wet side of stiff and then try stirring it with a spoon at various speeds. The properties are quite mind boggling. http://www.timesonline.co.uk/article/0,,2087-2340507,00.html -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist