The sweating hot plate test, also known as the "skin model," simulates the heat and mass transfer that occur next to human skin and measures both thermal and water vapor resistance
in order to determine heat loss through moisture evaporation.
The key to water vapor resistance
is a sufficient number of oriented crystallites throughout the material.
Its temperature establishes the vapor pressure in the wall cavity when you have porous vapor open cavity insulation like fiberglass and cellulose since these insulations have vapor resistance
close to that of "free air.
On the technical side, the coating has high carbon dioxide diffusion resistance (sd value more than 252m) while also offering low water vapor resistance
(sd value less than 0.
Put otherwise, the vapor resistance of the finishing coat strongly decreases with increasing relative humidity.
According to Annex G of (EN ISO 12572:2001) a correction for the vapor resistance of the layer of air in and above the cup has to be applied for very permeable materials.
II: Selection for ethanol vapor resistance
in Dropsophia melanogaster at two population sizes.
Tests carried out by Hohenstein included measurements of water vapor resistance
, short time water vapor absorbency, buffering capacity, thermal insulation, and sensorial wear comfort.