Garments Suitable for Type 3 and 4 Liquid Chemical Spray Protection
Type 3 & 4 garments are for protection against liquid sprays of hazardous chemicals.
The Types are defined by the "finished garment Type Tests"; tests on the whole garment which replicate the different types of liquid spray that might be found in real world applications. Both involve a test subject entering a cabin and being sprayed with a specific liquid in a specific format, emerging afterwards and with a defined method of identifying penetration of the liquid inside the garment with a pass or fail assessment. Whilst the liquid used is the same (lowered surface tension and died so any penetration is apparent) the difference in the type of spray is what defines each Type.
Type 3: a single jet spray applying considerable pressure and directed at possible weak points in the garment (such as seams and openings).
Type 4: a "shower-like" spray from four nozzles at the side of the cabin. Little pressure is applied from the spray on the garment but the garment is soaked over a one minute duration.
