Homebrew PCBs

Safety masks are inexpensive and are available at HD and Lowes. They're good
for dust and vapors. They have replaceable filtration elements.

Recommended.

jim ab3cv


[Non-text portions of this message have been removed]

On Sat, Jan 15, 2011 at 9:56 AM, Jim Miller <jim@...> wrote:
>
> Safety masks are inexpensive and are available at HD and Lowes. They're good
> for dust and vapors. They have replaceable filtration elements.
>
> Recommended.
>
> jim ab3cv

Don't waste your money on the paper type though, they must be the
silicone rubber type and have charcoal filters.  I use a 3M type with
charcoal filters + snap-on HEPA filters (Puchased the HEPA portion
online) and I have yet to find anything that could get through it with
much success.  Great for eliminating virtually any offensive odor as
well as some of the dangerous types, it is truly amazing the dense
smells it removes completely.

Larry

Just a note on the mask vapor cartridges.  Once opened, they are only good
for a certain number of hours.  Check the package.  I worked for a business
that used these, we got hit with an OSHA fine for not labeling the date on
the cartridge as to when it was first placed in use!  The date helps to know
when to change the cartridge.  On some cartridges, the active ingredients is
not just charcoal.  So they have a life once opened.  We were told the ones
we used were rated for the work we were doing, but had to be changed every
40 hours.  OSHA told us every Monday morning, start with fresh cartridges.

 

Brian G.

 

  



[Non-text portions of this message have been removed]

Are you guys talking about something like this?:
http://www.lowes.com/pd_215253-98-65021HA1-A_0__?productId=3082307&Ntt=dust+mask&Ns=p_product_price|1&pl=1&currentURL=%2Fpl__0__s%3FNs%3Dp_product_price|1%26Ntt%3Ddust%2Bmask

How do you know what it will filter out? (like etchant fumes?)


[Non-text portions of this message have been removed]

Yes, something like that, but go with the professional, not the household
one.  Also, make sure to get the right size.  They come in small, medium and
large.

 

Read the cartridge package to know what it will filter.  Also, read the MSDS
sheet on the chemicals you are using.  The sheets will tell you the
classification of the chemical.  I don't recall if they will tell you what
protection you should wear.  The cartridges are designed for specific
chemicals or groups of chemicals such as organic solvents etc.

 

Now, what most people do not understand about proper mask fit is that it
should be snug to the face.  When wearing the mask without the cartridges,
place both hands over the intakes to block air flow.  You do not want to
press hard, just hard enough to make a seal.  Then breathe in.  If the mask
sucks to your face then try breathing out.  The air should not escape
easily.  Improper fit of as mask is just as bad as not using one at
all!!!!!!  All of the air you breath while using the mask must pass through
the filters, not around the sides of the face-mask contact. 

 

Facial hair is a big no-no when wearing masks.  It prevents the mask from
making a seal against your face.  If you are not going to wear the mask
properly, then don't wear one at all!!!!  It will just be an uncomfortable
expensive face ornament.  Masks are not designed to be fashionable or
extremely comfortable, they are designed to protect your LIFE!!!!  So don't
cut corners on cost or by trying to extend the life of your cartridges.  You
are only fooling yourself and endangering your health.

 

Don't share you masks with anyone!  Clean your mask with an alcohol swab in
side and around the mouth guard.  When you breath, you release water vapor
and other things from your lungs.  Bacteria love this stuff.  You should see
pics of people who got rashes and infections from sharing masks and not
disinfecting/cleaning them properly!!!!!

Now you know!!!

 

Brian G. 

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of Nathan House
Sent: Saturday, January 15, 2011 1:10 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: RE: [Homebrew_PCBs] Gas Masks

 

  

Are you guys talking about something like this?:
http://www.lowes.com/pd_215253-98-65021HA1-A_0__?productId=3082307
<http://www.lowes.com/pd_215253-98-65021HA1-A_0__?productId=3082307&Ntt=dust
+mask&Ns=p_product_price>
&Ntt=dust+mask&Ns=p_product_price|1&pl=1�tURL=%2Fpl__0__s%3FNs%3Dp_pro
duct_price|1%26Ntt%3Ddust%2Bmask





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On Sat, Jan 15, 2011 at 2:09 PM, Nathan House
<nathanhooyagroups@...> wrote:
>
> Are you guys talking about something like this?:
> http://www.lowes.com/pd_215253-98-65021HA1-A_0__?productId=3082307&Ntt=dust+mask&Ns=p_product_price|1&pl=1¤tURL=%2Fpl__0__s%3FNs%3Dp_product_price|1%26Ntt%3Ddust%2Bmask
>
> How do you know what it will filter out? (like etchant fumes?)

More like this one:
http://www.lowes.com/ProductDisplay?partNumber=69598-98-R6211&langId=-1&storeId=10151&productId=1097909&catalogId=10051&cmRelshp=sim&rel=nofollow&cId=PDIO1

Note the additional filters on the outside which will pick up fine
mists, although like I said, I prefer the true HEPA add-ons for
completeness since they will grab dusts as well as mists.  You can
find out exactly what it will and won't filter by going to 3M's web
site.  They rate the HEPA filters as being appropriate for hazardous
industrial dusts and radio-nucleotides :-)  You're probably fine with
the one I linked to although of course I assume no liability for
anything you may choose to inhale!  3M's site will also give you the
working lifetime of the cartridges.

Larry

There are several factors which affect how long the mask with adequately
filter out vapours.  The previous posts are all correct - once opened, a
filter has a finite life, even if you don't breath through them.  The length
of time that a filter will work while you're using it will also be affected
by the vapour concentration, the chemical itself and your work of breathing
- if you're just standing around there is not as much air moving through the
filter than if you're working hard (breathing heavier and faster) and
therefore the filter will last longer.

   The other important points are:  they only filter our the contaminant. If
the contaminant has displaced oxygen to the point that the oxygen levels
have gone below safe limits, then you need to switch to a supplied (fresh)
air system.  Not usually a problem in a home workshop, but in a cellar or
pit this can (and has) become a fatal consequence.

    Not all filters are created equal.  For wood dust issues, a particulate
filter should be fine, and if you use one with a carbon filter, it may block
up really quickly.  Some chemicals attack carbon filters (and the exposure
limits are measured in minutes) whereas other don't and the exposure limits
can be measured in days (or weeks)  You should really consult the experts
for an idea of the best filters to use.... Again, for most of what happens
in a home workshop, general particulate filters with a carbon filter are
usually adequate.

   You need to ensure that there is a good seal around the mask - here in
OZ, in the workplace, the Australian Standard requires all persons who wear
respiratory protection not have facial hair outside the nose/mouth borders
(the so-called oro-nasal cup)  i.e.. small goatees are fine, along with
Hilter style moes, but handlebar moustaches and full beards are not.

  HTH, (and the usual disclaimers)

  Trev

On Sun, Jan 16, 2011 at 1:26 AM, Jim Miller <jim@...> wrote:

>
>
> Safety masks are inexpensive and are available at HD and Lowes. They're
> good
> for dust and vapors. They have replaceable filtration elements.
>
> Recommended.
>
> jim ab3cv
>
> [Non-text portions of this message have been removed]
>
>  
>


[Non-text portions of this message have been removed]