Thingiverse is currently experiencing issues related to search. We are currently investigating. Thanks for your patience.


MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.

Download Now


1982 Copper/Zinc Penny Scale

by LostArrow81 Feb 8, 2018
Download All Files

Thing Apps Enabled

Please Login to Comment

It's 1985 that they switched. When I was a kid we used to collect the 1985 and older pennies and take a blow torch to them. All copper pennies would turn into a ball of liquid copper. The newer ones would just bake.

Thank you for the comment! I went ahead and checked up on this because I wasn't 100% sure. Now I am. I checked the U.S mint site and they stated in a bullet:
The alloy remained 95 percent copper and 5 percent zinc until 1982, when the composition was changed to 97.5 percent zinc and 2.5 percent copper (copper-plated zinc). Cents of both compositions appeared in that year.