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(Very new to thrifting) Bought a smooth 80s cast iron pan and noticed some silver specks only after getting home.
(sh.itjust.works)
I’m guessing the finish chipped from the store cleaning the pan aggressively, but poorly, given the recent sticker date. Is that unusual? Gonna refinish it myself this week, as long as this isn’t setting off anyone’s alarm bells.
Edit: gonna head to the hardware store for a lead test kit and magnets this weekend, unless someone can think of a better process. Thanks for the advice, all!
For precisely that worry, I’ve read a fair bit and at-home tests seem pretty unreliable. Most tests, reportedly, can offer a false positive from contact with iron. Including those marked for general, non-paint use.
So far, I’ve only managed to learn that (maybe) my local recycling center might possibly have the gear to test this, but otherwise that’s as far as I’ve come. If you know where to test for lead, I’d appreciate the scoop!
1: Break off some of the little shiny specks.
2: See if those specks will stick to a strong magnet. (If not, that's a bad sign.)
3: Do one of those at-home test kits on only the specks.
If it didn't stick to the magnet and the test kit says positive for lead, then you know you're not getting a false positive on iron -- if it was iron or anything ferrous, it would have stuck to the magnet. That doesn't absolutely guarantee the accuracy of the test kit, but it would eliminate one common false positive.
If you can separate a sufficiently large speck, you could also do a hardness test on it: what materials is it able to scratch, and what materials rub material off of it? Lead is very much on the softer side, so if the specks are easily deformed and abraded -- especially when tested against things like aluminum -- that's another bad sign that it might be lead.
And, at any rate, I'd be leery of it if the specks don't stick to a magnet. The list of non-magnetic, silver-colored metals you want in contact with your food is pretty short, while the list of ones you don't want in your food is pretty long. Lead is probably the most likely and the worst offender on the list, but there are other possibilities that people might have been messing around with ... and most of those other possibilities aren't great to have in your food, either.
Streak, cleavage, hardness, magnetism, albedo. You just gave me a flashback to 4th grade playing this computer game in class where one had to guess the element based on the above criteria. Very hard for 9yr old me.