Respirators can generally be divided into two primary categories: cheaper, single-use disposable masks and reusable respirators that employ more sophisticated cartridges to filter the air. Reusable respirators are also known as air-purifying respirators, abbreviated as APR on occasion, and can be divided further into two common types: full-face respirators and half-mask respirators. Knowing which type of respirator to use in the varying circumstances and hazards that may exist is critical! Disposable masks do not filter air in the same way reusable respirators do. Therefore, always do your research to know when it's appropriate to use a disposable mask or a reusable respirator.
Like disposable masks and reusable respirators, half-mask respirators and full-face respirators each have their respective set of circumstances where using one is preferred or even mandated over the other. As a general rule, half-mask respirators are used in situations where the eyes do not need to be protected from the vapors or air to which they are exposed. Many gases that may exist in a hazardous area can irritate or cause severe damage to the eyes. These circumstances, obviously, would mandate that a person use a full-face respirator. A common example of a person using a full-face respirator is a fireman. Of course, these individuals always have a supply of air, but they use a full-face respirator to protect their eyes from the heavy smoke put off by the fire. A frequent situation in which half-mask respirators are used is when painting. Many industrial workers who paint products as part of the manufacturing process will wear half-mask respirators because the paint likely doesn't do harm to the eyes and, therefore, may not be necessary.
One of the complications in using a full-face respirator mask is that the lens may become scratched making it more difficult to see. In addition, when used in situations like painting the mask can become covered with a film of the product being used in the work setting. This too can obscure the vision. Many masks have the option of purchasing lens covers that stick to the full-face mask and can be peeled off after they are used. These accessories help preserve the lens from scratching or other products that may be hard to clean off the lens.
Regardless of whether a person is using a full-face respirator or a half-mask respirator, the user should always perform a fit test prior to use in unsafe or hazardous conditions to ensure the mask is performing effectively. When used properly, reusable respirators can be a comfortable, vital part of a person's personal protective equipment.
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