Historical
ISO 27588:2008
Rubber, vulcanized or thermoplastic - Determination of dead-load hardness using the very low rubber hardness (VLRH) scale
ISO 27588:2008 specifies a dead-load method for the determination of the hardness of very soft vulcanized or thermoplastic rubbers.
The relation between the depth of penetration and the VLRH scale is linear.
International Organization for Standardization [iso]