Based on ASTM Standards, distance between 2 indents is a minimum of 2 times the indentation’s diagonal (dK), and 2 ½ times the indentation’s width (dW).

The distance between an indentation’s center and a test piece edge is at least 1 dK or 2 ½ times the indentation’s dW.

Based on ISO Standards, distance between 2 indents is at least 2 times the indentation’s dK, and 3 ½ times the indentation’s dW.

The distance between an indentation’s center and a test piece edge is at least 1 dK or 3 ½ the indentation’s dW.

Based on JIS Standards, the distance between an indentation and a test piece edge is a minimum of 3 times the short dW. The distance from one indentation to an adjacent indentation is at least 2 ½ times the short dW, or a minimum of the long dK. If 2 indentations have different sizes, the spacing minimum is based on the short dW of the bigger indentation.