Ultrafine Wind Detection Powder

a small squeeze pepper container with plain flour if you want to play with powder.

It doesnt whiff like talcum either
 
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Lycopodium powder is the best stuff by far.

Readily available on e.g. ebay.

​Also amusing when puffed over an ignition source. Massive (but relatively safe) flareup.
 
I mix talcum powder and very light (12gr/l) micro balloons . Got plenty in the workshop.
edi
 
like that idear :thumb: but blue powder round the old sack/crack may be a problem! her idoors may think i'v been round the sheep pen's :eek: i'll stick with me universaul johnsons powder .



Builders line chalk from builders merchant comes in different colours
 
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