Introduction
Consult with appropriate safety
personnel or “Industrial Hygienist”
if in doubt as to the suitability of a
particular respirator before using it.
Respirators may not provide
protection against eye and skin
absorption of chemicals.
Spray finishing creates a certain
amount of overspray, hazardous
vapors and toxic fumes. This is
true, even under ideal conditions.
Anyone near a spray finishing
operation should use some type of
respirator, or breathing apparatus.
This chapter covers various types
of equipment for this use.
1. What is a respirator?
A respirator is a mask that is worn
over the mouth and nose to
prevent the inhalation of overspray
fumes and vapor.
2. Why is a respirator necessary?
For two reasons:
First...some type of respiratory
protection is required by OSHA/
NIOSH regulations.
Second...even if it wasn't a require-
ment, common sense tells you that
inhaling overspray is not healthy.
Overspray contains toxic particles
of paint pigments, harmful dust
and, in some cases, vapor fumes
which can be harmful to your
health.
Depending on design, a respirator
can remove some, or all, of these
dangerous elements from the air
around a spray finishing operator.
3. What types of respirators are
used by spray finishing
operators?
There are three primary types; the
air-supplied respirator, the organic
vapor respirator and the dust
respirator.
4. What is an air-supplied
respirator?
This type is available in both mask
and visor/hood styles. Both provide
the necessary respiratory
protection when using materials
that are not suitable for organic
vapor respirators.
The visor/hood style provides a
greater degree of coverage to the
head and neck of the operator.
Both styles require a positive
supply of clean, breathable air as
defined by OSHA (Grade D).
Figure 1 – Positive Pressure
Visor/Hood
Figure 2 – Positive Pressure Mask
Respirator
5. What is an organic vapor
respirator and where is it used?
This type of respirator, which
covers the nose and mouth,
(see Figure 3) is equipped with
replaceable cartridges that remove
organic vapors by chemical
absorption.
Some are designed with pre-filters
to remove solid particles from the
air before it passes through the
chemical cartridge.
The organic vapor respirator is
normally used in finishing
operations with standard materials
(not suited for paints containing
isocyanates).
Figure 3 - Organic Vapor Respirator
6. What is a dust respirator and
where is it used?
Dust respirators are sometimes
used in spray finishing but, in
most applications, they are
unsatisfactory. (see Figure 4)
Figure 4 - Dust Respirator
These respirators are equipped
with cartridges that remove only
solid particles from the air. They
have no ability to remove vapors.
They are effective, however, in
preliminary operations such as
sanding, grinding and buffing.
NOTE:
Before using any respirator,
carefully read the manufacturer’s
Safety Precautions, Warnings and
Instructions. Many respirators are
not suitable for use with
isocyanates, asbestos, ammonia,
pesticides, etc.
6. Respirators
22
(8 pages)
(32 pages)
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