Living up to my username - an ongoing thread about Silver Steel

[Iceni]

So how about the TI razors that were supposedly immersed in molten lead to temper them?
Would there be Pb in the metal of the razor?

No the lead falls off. It might leave a micro layer but nothing of any worth, And the steel when it goes into the lead bath is not molten. They use the lead because it can be heated to a specific temp and it draws the heat from the metal faster than oil or water (better thermal conductivity). Meaning in theory they have better control over the internal crystal growth of the steel when they temper it. TI's system doesn't attempt to alloy lead with steel, and if it left more than a micro trace I think the practice would be banned. They had to get special permission to use that system, and prove it didn't leave a dangerous trace.