A selection of the 1-kg stainless steel weights used in the study. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing ...

As a national metrology institute, the National Metrology Institute of Japan (NMIJ), AIST has been maintaining a group of 1-kg stainless steel weights since 1995. The mass values of the 1-kg weights ...