Simon wrote:
Does anyone know what Formula 409 consists of as it is not in my
supermarket or chemistry book? Is it just a local product in one country
or maybe it is just acetone, alcohol or methylated spirits under a fancy
name?

It's 2-butoxyethanol, with a little soap and water and a pH buffer to keep it
alkaline. In the US, you can buy commercial degreasers with much higher
2-butoxyethanol content (Ace Hardware sells something by the gallon that is
almost half 2-butoxyethanol), but 409 is plenty strong.

It's a good solvent for anything greasy or oily.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."