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<DIV>Remote breathing air devices are not that difficult to construct.</DIV>
<DIV>Use a NEW long vacuum cleaner hose plumbed to a respirator mask that leads
into your shop (use a little common sense here...), pressurize the shop with
window fans on the far side of the building and paint outside. Leaks in the mask
& plumbing are OK because everything is going out.</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Explaining why you are doing it that way to family & friends is a lot
harder!</DIV>
<DIV> </DIV>
<DIV>John Ferrell <BR><A
href="http://DixieNC.US">http://DixieNC.US</A><BR></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=ehaury@houston.rr.com href="mailto:ehaury@houston.rr.com">Earl
Haury</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, January 17, 2005 7:12
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Speaking of
painting...Respirator tips</DIV>
<DIV><BR></DIV>
<DIV>For those not wishing to take risks - do a web search for the Axis
Hobbyair forced air systems, available from several sources. They're
affordable, comfortable, and durable.</DIV>
<DIV> </DIV>
<DIV>Earl</DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=MKMSG@aol.com href="mailto:MKMSG@aol.com">MKMSG@aol.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, January 17, 2005 5:34
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Speaking of
painting...Respirator tips</DIV>
<DIV><BR></DIV><FONT id=role_document face=Arial color=#000000>
<DIV>The following is an extract of an OSHA study done at a Denver
automotive paint shop where urethane containing polyisocyanates is sprayed
daily. The study concluded the workers were protected at an adequate
level (they wore protective suits and were using a forced air breathing
system). I'm not advocating not using automotive polyurethanes, but if
you're going to use them, be aware of the dangers and take the precautions
recommended by the paint manufacturers. I used to spray Imron with great
results, but am now experimenting with other paints to eliminate the
hazard.</DIV>
<DIV> </DIV>
<DIV>Mike Moritko</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>OSHA Report Extract: </DIV>
<DIV> </DIV>
<DIV>Probably the most debilitating health effects from workplace exposure
to diisocyanates are respiratory and dermal sensitization. Exposures can
lead to sensitization depending on the type of exposure, the exposure
concentration, the route of exposure, and individual susceptibility. Dermal
sensitization can result in such symptoms as rash, itching, hives, and
swelling of the extremities.<SUP>18,21</SUP> Respiratory sensitization from
exposure to diisocyanates results in the typical symptoms of asthma.
Estimates of the prevalence of diisocyanate-induced asthma in exposed worker
populations vary considerably; from 5% to 10% in diisocyanate production
facilities,<SUP>22,23</SUP> to 25% in polyurethane production
plants,<SUP>22,24</SUP> and 30% in polyurethane seatcover
operations.<SUP>25</SUP><BR><BR>A worker suspected of having
diisocyanate-induced sensitization will present with symptoms of traditional
acute airway obstruction; e.g., coughing, wheezing, shortness of breath,
tightness in the chest, nocturnal awakening, etc.<SUP>18,20</SUP> Upon first
exposure to diisocyanates, the worker may develop an asthmatic reaction
immediately or several hours after exposure, after the first months of
exposure, or after several years of exposure.<SUP>18,20,23,26,27</SUP> some
evidence exists which suggests that the onset of sensitization occurs after
a mean exposure interval of two years.<SUP>28</SUP> After sensitization, any
exposure, even to concentrations below any occupational exposure limit or
standard, can produce an asthmatic response which may be life threatening.
This asthmatic reaction may occur minutes after exposure (immediate),
several hours after exposure (late), or a combination of both immediate and
late components after exposure (dual).<SUP>20,26</SUP> The late asthmatic
reaction is the most common occurring in approximately 40% of
diisocyanate-sensitized workers.<SUP>29</SUP> Recurrent nocturnal asthma has
been described in workers sensitized to TDI and MDI.<SUP>30,31</SUP> An
improvement in symptoms may be observed during periods away from the work
environment (weekends, vacations).<SUP>18,20,26</SUP><BR><BR>The percentage
of sensitized workers with persistent symptoms of asthma after years of no
exposure may be 50% or higher. Studies have shown that workers with
persistent asthma have a significantly longer duration of symptoms prior to
diagnosis, larger decrements in pulmonary function, and a severe degree of
nonspecific bronchial hyperactivity at diagnosis.<SUP>26</SUP> These data
suggest that prognosis is improved with early diagnosis of
diisocyanate-induced respiratory sensitization and early removal from
diisocyanate exposure. This emphasizes the need to minimize workplace
exposure concentrations, and for active medical surveillance of all workers
potentially exposed to
diisocyanates.<BR></DIV></BLOCKQUOTE></BLOCKQUOTE></FONT></BODY></HTML>