Quote Originally Posted by handmadeblanks View Post
15 minutes?? No offence, but you must be doing something wrong, or, you aren't using the right size burner on your Sievert.

I use a 2" scorifier like this one: http://www.cooksongold.com/Jewellery...prcode-999-AKP
With this Sievert burner: http://www.cooksongold.com/Jewellery...prcode-999-ALD

I have made successful ingots with up to 20g of sterling silver and it has never taken more than 5 minutes for it to be swirling around like quicksilver and ready to pour. I have also made a number of delft clay casts with around 15g of silver and again, I never have gone beyond 5 minutes before it's ready to pour.

A good rule of thumb is to use the larger burner which is rated at around 240g/h to melt around 1oz of silver.

If you do it right, i.e. Have the right torch burner at the correct distance, the silver will be molten within about 90 sec and ready to pour between 3-5 minutes.
Well perhaps it wasn't 15 minutes but it seemed a long time.... Next time I will time it and see!