On 09/02/2018 13:18, David wrote:
I am assuming that the glass part of the cooker hood is tempered and melts
at a higher temperature than normal soda glass and so is not suitable for
recycling.

http://wastesavers.co.uk/cant-recycle-glass-tumblers-pyrex/

As usual an Internet search seems inconclusive.

Just in the process of throwing out all the bits of the old cooker hood
before fitting the new one.

Cheers



Dave R


Not sure that it is chemically different. There is an alternative
hardening process which diffuses potassium into the surface (roughly
analogous to carburising or nitriding)

https://en.wikipedia.org/wiki/Toughened_glass

But IIRC you are not encouraged to recycle any sheet glass into bottle
banks.