Definitions for "Perm"
Keywords:  mercury, vapor, psi, foot, grain
A measurement of how much water vapor a material will let pass through it per unit of time.
The mass rate of water vapor flow through one square foot of a material or construction of one grain per hour induced by a vapor pressure gradient between two surfaces of one inch of mercury or in units that equal that flow rate.
a measurement unit of how quickly water vapor will pass through a membrane or skin
Keywords:  russia, city, european, part
a city in the European part of Russia
a series of waves in the hair made by applying heat and chemicals
a generic term for chemically altering the internal bonds of your hair pattern