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One-brick forge was the term I was looking for. Cheap, easy, and imo much easier to use for a thin razor than a torch.

It's going to be very hard to do so reliably. The spine will continuously suck heat out of the edge, while you are trying to bring the edge to an even heat with a moving heat spot. And you will want...

I agree with Scott BTW. First make razors that are plain-ish, like the sheffield razors or solingen razors. Tear apart some old vintage ones.
You want to make them, see if they work, why they do or...

It's one thing to make outlandish designs. I've certainly made some.
But even my wildest designs are still pretty much sharing the same geometry as a sheffield razor when you strip away the...