A new excavation in the Ghaggar-Hakra basin of Punjab has uncovered an industrial site dedicated to the production and quality control of Harappan bricks. The most significant find is a brick-kiln registry—a collection of terracotta tablets that record firing temperatures and batch numbers for millions of mud and fired bricks. This discovery explains how the Indus Valley civilization maintained such precise 1:2:4 ratio standards across vast geographic distances.
The site includes several intact kilns with specialized ventilation shafts and evidence of a centralized regulatory body that oversaw the structural integrity of materials used in city walls and public buildings. Researchers from the National Institute of Archaeology state that this registry is the earliest known example of industrial standardization in human history, demonstrating the Harappans' mastery of thermal engineering and logistical oversight.