I'm new to SS pin tumbling. With some of my brass, I chose to oven dry. I have a gas oven and set it to 220f - figuring to go a little over the boiling point of water. I have an oven thermometer and the oven's thermostat is accurate.
All the brass I oven dried slightly discolored from that normal bright yellow brass color to a tawny, slightly orange-ish discoloration.
What happened? Surely the brass didn't get hot enough to anneal. They were first tumbled with water, a squirt of Dawn, and just a 1/2 of a 380 ACP cartridge full of Lemi-shine. 1lb water; 1lb pins; 1lb brass. I rinsed them really well before placing in the oven.
Air dried brass is fine. This is 38 Special brass, if it matters. Fairly new - fired maybe once or twice. Most of it - but not all - is Winchester.
I'm also curious if it's permanently discolored, or if it will tumble back out. (I'm guessing it's permanent.)
All the brass I oven dried slightly discolored from that normal bright yellow brass color to a tawny, slightly orange-ish discoloration.
What happened? Surely the brass didn't get hot enough to anneal. They were first tumbled with water, a squirt of Dawn, and just a 1/2 of a 380 ACP cartridge full of Lemi-shine. 1lb water; 1lb pins; 1lb brass. I rinsed them really well before placing in the oven.
Air dried brass is fine. This is 38 Special brass, if it matters. Fairly new - fired maybe once or twice. Most of it - but not all - is Winchester.
I'm also curious if it's permanently discolored, or if it will tumble back out. (I'm guessing it's permanent.)