[sdiy] Chip Tempcos was RE: Solder paste and toaster ovens

[Tony Clark]

> Small holes filled with air are really effective thermal isolators - and if
> the holes are small (less than say 0.5mm diameter) the convective
> (thermal-induced) air exchange will be next to negligible due to drag.
> 
> Or so I was led to believe at school...

   If you want to be picky, it largely depends on whether or not the 
material doing the insulating is open-cell or closed.  Closed cells 
insulate much better, similar to double or triple pane windows with inert 
gas in the middle.
   I have NO clue which kind packing peanuts have!

   Cheers,

   Tony

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