IEC 62899-402-1:2025 specifies the measurement methods of the width of line pattern and spaces between the line patterns in printed electronics. These printed line patterns are treated as two-dimensional on a substrate. When the patterns are definitely affected by three-dimensional configurations, these are specified in measurement methods for vertical variance in printed electronics.This edition includes the following significant technical changes with respect to the previous edition:a) The title is changed from 'Printability – Measurement of qualities – Pattern width' to 'Printability – Measurement of qualities – Line pattern width'b) The term 'pattern width' is specified as 'line pattern width'.c) The measurement method of line pattern space is included.d) The definition and measurement of inner/outer edge lines are removed.