Filter Mask for Dope

[Motorman]

Too cold to paint outside. What mask do you use when you apply nitrate dope?


Thanks,
MM

[Mark Scarborough]

honestly, the same mask you use for spraying isocyanate death paint. Its the VOC that are the problem with dope.

a larger concern when painting dope in a confined space is ventialtion and volitility. make sure you dont saturate the air with evaporated solvents, dope emits LOTS of them, dont use a residential fan to evacuate fumes unless its on the intake side of your ventilation flow, you really dont want to suck solvent through an electric motor that is not designed for it, sparks can do nasty things with solvent vapors,, like ignite a fire,,

a charcoal respirator designed for spraying is what you want, 3M makes them as do may other companies, lots of info here on the site, search for respirators

[Curare]

Just quietly, if you're spraying isocyanate death paint, you want supplied air from a separate source, not just a mask.

If you're laying dope I use a Protector cartridge style mask, and use cartridges designed for solvents, not dust.

[Avaiojet]

Too cold to paint outside. What mask do you use when you apply nitrate dope?


Thanks,
MM

MM,

What are you applying the nitrate on? Sheeted areas, open bays, framed model?

Charles

[Motorman]

Just brushing dope on the frame so I can stick polyspan down then going to iron on coverite. Trying to get it finished with minimum paint fumes. Can you apply polyspan with polycrylic? they both have poly in the name.

MM

[john e. holliday]

I used poly-crylic to put the new poly material on the B-25 wing.   The new stuff takes more dope to fil and the poly seems to work.   So far the material hasn't come off.  Also a covering iron helps to stick it down on the tips.  The poly seems to fill the weave better also.   The wing before I put it in the fuse was at 12.8 ounces.

By the way I don't spray dope indoors.   I do use a cartridge mask when I spray the two part automotive paints out doors.

[Motorman]

Just got an email back from Aircraft Spruce. Just a particle filter is needed no organic vapors. What do you think.
worried about the thinner fumes.

http://www.aircraftspruce.com/catalog/topages/xplore12-02257.php?clickkey=2941231


"Thank you for contacting Aircraft Spruce.
 
You recently wrote:
What mask do you use when you apply nitrate dope?      
 
To which our reply is:
You will just need a mask that has a P100 filter".


MM

[Avaiojet]

Just got an email back from Aircraft Spruce. Just a particle filter is needed no organic vapors. What do you think.
worried about the thinner fumes.

http://www.aircraftspruce.com/catalog/topages/xplore12-02257.php?clickkey=2941231


"Thank you for contacting Aircraft Spruce.
 
You recently wrote:
What mask do you use when you apply nitrate dope?      
 
To which our reply is:
You will just need a mask that has a P100 filter".


MM

MM,

I would talk to the people that make the mask, as I did. In my case, 3M.

[TigreST]

Here at the refinery we use 3M cartridge mask technology all the time.  The standard gear includes:

Half face mask plus P-100 filter for dust and particulate control. (3M-2091 or 3M-2097)
For VOC and solvent type absorbtion we go with the  P-100 filter set in conjunction with The 3M-60921, 3M-60923, or 3M-90926 cartridges. The effective protection duration of these cartridges is dependent upon the ppm (parts per million) measurement and the type of the contaminate in the air. The higher the ppm count the shorter the cartridge protection duration.

I use the same stuff at home.  Guess where I get it from?  The company is very good about suppling safety gear for home use.  I have no idea on pricing of the mask or cartridges.

Supplied air is also automotive standard for the use of 2part catalyzed finishing materials that contain isocynates.  The masks are a full face unit, not just a nose/mouth half mask mask systems.

Tony

[Motorman]

I found the 3M 60923HB1 filters and half mask at Lowes.


MM

[Mark Scarborough]

If you can smell the material while wearing the mask its not working, its either the wrong filter type, or it isnt fitting properly.
I am concerned that filter isnt really affording you the protection I would want , if your concerned about it

but each to their own devices,,

[Motorman]

Well I haven't tried it yet so I'll let you know. Says it's good for organic vapors and acid fumes so, unless it leaks, I think I'm good.

MM

[FLOYD CARTER]

A small correction.  Exhaust fans create no sparks, and therefore not a hazard with volatile solvents.  These motors are true induction types, without brushes.  Therefore, no sparks.

Floyd

[Mark Scarborough]

FLoyd, true enough, I am still paranoid about vapors and ingnition sources,, but yes, an induction motor should not create sparks