[R-390] Acetone solvent

[Robert Moses]

Acetone will dissolve, swell, or soften most non crosslinked polymers
and you are correct that it can ruin finishes (and worse). Isopropanol
is much less aggressive. If you use it use the 91% rather than the 70%
concentration as a solvent since the large amount of water in the 70%
concentration tends to interfere with its ability to dissolve
hydrophobic materials like grease.

On 05/17/2014 06:12 AM, Gordon Hayward 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.
> I disagree.  Clean acetone doesn't polymerize and doesn't leave residue.
> A long time ago we used to dry lab glassware with acetone because it forms
> a low boiling azeotrope with water. That said, now we avoid releasing VOC's.
>
> You need to be careful with acetone because it dissolves a lot of plastics
> and can easily ruin nice surfaces. 2-propanol is a lot less aggressive.
> Both are flammable.
>
> Cheers, Gord VE3EOS
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