Blade soaking mistake

[DaveStauffer]

Two important facts about me.

1. I live in Albuquerque, and the water is made of stone.
2. I'm ritualistic. This helps improve technique.

Last night's shave started off as a nightmare. I contacted my face with the blade (a Dovo) moved about 1/4 inch and stopped. It was not pleasant. I soak my brush, washcloth, lather bowl and soap tub in the sink while I take a shower. Last night I put my blade in a cup of hot water in the sink in order to warm it up. When I got out, the blade had some strange colored marks on it. I had already stropped it also. As I said, in the condition it was in, it was not going to happen. I almost reached for my Merkur safety but thought about it for a second. Why the sudden change? It was fine the last time I used it as a matter of fact it was excellent! So I re-stropped it and it was fine.

Minerals on the blade?

What do you guys think?