“As I near retirement and am thinking about starting up a home crafting business, I am planning to include RF blocking fabrics into some of my crafts.”
Awesome. I think you are on to something. Here’s something you might be interested in. One of my employers used RFID tags on our badges to track where we were and how many times we went to the bathroom. An employee kept his badge inside a magnetic blocking pouch. I don’t know if this could also block the signature of a gun, but it’s possible.
http://www.magnetic-shield.com/faqs-all-about-shielding.html
Interesting link, thank you.