26-10-2021, 08:23 PM
Bob, you would be surprised how accurately you can work temperatures from metal colour. Whilst the colour is given a name, whether it is 'straw' or 'Cherry red', it is a colour recognised for its temperature rather than its straight literal interpretation. Cherry Red is even easier as it is also the point at which steel ceases to be magnetic so you can double check your visual estimation if you need closer accuracy.
Andy
Andy
Enjoy yourself, it's later than you think!