----- Original Message -----
From: "Frank Key" <[email protected]>

Frank,
What colour are particles less than 10 nm?
Have you sized a red or yellow sol?

Ivan.

> If anyone is really interested I will take a photo of such a solution
and post it on my web site. I routinely make 5 to 10 ppm all particles
in the 10-30 nm range. These all appear white and milky.
>
>
> frank key
> www.silver-colloids.com
>
>
>
>
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