Iron filings are a traditional way to “see” magnetic fields. Ask anyone who ever had a Wooly Willy. Iron filings can be fun to play with, although we don’t think we’ve ever had any this fine.

A UCC filing is the official notice that lenders use to demonstrate their security interest in a borrower’s assets.

A Uniform Commercial Code filing—or UCC filing—is a form of notice that lenders use when securing a borrower’s loan with an asset or group of assets.

Walt (oneminmicro) Discovering Iron Filings in Cereal With a Microscope. Posted: June 10, 2025 | Last updated: June 10, 2025. More for You ...

The hidden hazards of bargain PSUs: a case packed with iron filings "I'd barely call it a PSU" By Rob Thubron December 7, 2023, 10:02 12 comments. Serving tech enthusiasts for over 25 years.

Small filings of iron are first scattered on the surface of a table and then a magnet is placed carefully among them. Its magnetic field induces magnetism in the iron filings, turning them into ...