[R-390] How are your knobs ?

[Robert Moses]

Tradition dies hard.

On 05/17/2014 06:40 PM, Mike A wrote:
> On Fri, May 16, 2014 at 09:30:24PM -0600, Robert Moses wrote:
>> A word on acetone: it polymerizes and leaves an organic residue. If you
>> want a clean surface wash off the acetone with distilled water and then
>> bake off the water film after shaking out the drops that you are able
>> to. (Baking would be at about 240 F (120 - 140 C ) for a day or 2. I am
>> assuming that you are talking about the 2 larger metal tuning knobs.)
>> Before baking non metal parts test to be sure that they will not be
>> damaged.
> This is interesting. 
>
> I've used it for the final cleaning on lab glass and optics, and my wife, a
> chemist, has used it to clean and dry lab glass forever. Neither one of us has
> ever heard of any problems with acetone polymerizing by itself on clean glass
> surfaces. When mixed with other reagents, though not water, it may polymerize,
> and there are articles on this in the literature, but none that I could find
> for just acetone by itself or with water.
>