Page 5 - PPE GUIDELINE
P. 5
Guidelines on the Use of PPE Against Chemical Hazards
1.2.2 Terms Used Under Hand Protection
Breakthrough time
Time it takes a chemical to permeate completely through and is determined by
applying the chemical on the glove exterior and measuring the time when the
chemical is first detected on the inside surface.
Degradation
Measurement of the physical deterioration of the material due to contact with a
chemical. The material may get harder, stiffer, more brittle, softer, weaker, or the
material may actually dissolve in the chemical.
Permeation rate
The rate at which the chemical will move through the material in a laboratory and is
expressed in units of [weight of chemical] per [unit area of material] per unit [unit of
2
3
time], e.g. mg/m /s or μg/cm /min.
Department of Occupational Safety & Health, Ministry of Human Resources, Malaysia October 2005 5
