LENETA - Penopac charts
Penopac charts
These Penopac charts (Penetration & Opacity) combine the test areas and functions of a Penetration map and an opacity map.
They can be regarded as universal test cards for research and development as well as for quality control.
Penopac cards included both sealed and unsealed areas. The sealed Areas are marked with a clear, impermeable top layer which prevents penetration, while the not sealed Areas with a semi-porous clay coating are provided.