This RagCutter Invention Extends the Life of Rags

This RagCutter was invented by Jock Mathewson, a New-Zealand-based paint and panel shop owner. Paint businesses go through a lot of rags--Mathewson regularly buys them in 20kg (44 lb) bags—and Mathewson sought to cut down on waste. "[The rags] are expensive and usually too big," he explains. When his workers use rags to wipe away a small amount of paint, they must throw the entire rag out, even though most of it is clean, to avoid ruining the next thing they wipe. "So I thought there must be...