Penetration Paint Charts have adjacent sealed and unsealed areas which help present severe conditions of varying porosity for testing penetration resistance.
Chart with both sealed and unsealed areas
Great for architectural finishes
Helps identify the ability to maintain a uniform appearance on surfaces of varying porosity This ability, of which gloss and color uniformity are specific aspects, is referred to as penetration resistance.
In addition to qualitative visual observations, photometric measurements on the two areas provide objective numerical values.