Pusey & Jones got its start in 1848 in Wilmington, Delaware, building steam engines and iron-hulled ships—later pivoting to papermaking and industrial machinery. By the early 20th century, their in-house labs and testing rooms, like the one from 1913, were already pioneering rigorous quality assurance. Their famous “Pusey & Jones indentation” test became an ASTM standard (D 531), revo... https://yorktestingsolutions.com/pusey-jones-hardness-tester/