[Noisebridge-discuss] Sulfuric Acid

Kelly hurtstotouchfire at gmail.com
Mon Aug 9 12:35:26 PDT 2010

It looks to me like there's a sealed container of sulfuric acid in the
darkroom, not an open bath of it. Sean made this sound way sketchier
than it is. The darkroom has basic ventilation (granted, it currently
pipes into the general space, but now that the bathroom has a ceiling,
we'll start running it out to the window). Anyone doing non-standard
film chem work in there is expected to do due diligence as far as
fumes. We will put up a sign with the numbers regarding the fan's
power, and what level of air cycling people can count on in that

I think what's more important than signage is a general social
awareness that there may be genuinely dangerous things in the

Basically what I'm saying is that there may not always be someone
around who know's what's what in there, so if you see people poking
around, say hi and give them the spiel, point them at myself or
another member that uses the darkroom, or at the darkroom mailing


On Sun, Aug 8, 2010 at 21:24, Seth David Schoen <schoen at loyalty.org> wrote:
> Sean Cusack writes:
>> Seth - I don't think we want to go so far as to add a NFPA fire code label.
>> The ratings that end up on those labels are *not* standardized. In other
>> words, one site's flammability "4" rating may be a different site's "2"
>> rating. The person who sets the rating is generally an assigned safety
>> person with some kind of qualifications to be making those classifications
>> based on their knowledge of the site's storage facilities and level of
>> expertise. Since we don't really have one of those people, I don't really
>> know who would assign the ratings.
> I appreciate your concern.  Maybe we can look into whether we could
> get someone properly qualified to assign a proper NFPA code.
> I did see a strong consensus from site to site about the particular
> ratings that are appropriate for sulfuric acid.  Several different
> sites all agreed on the values red 0, blue 3, yellow 2, NO WATER.  But
> it might still be better to approach an expert.
> It could be a good thing to have an appropriate fire diamond.  I've
> seen several of them around the neighborhood, including for places
> like photo shops.  I wouldn't think there's anything unduly bizarre
> or scary about displaying one (maybe depending on the contents of the
> fire diamond).
> --
> Seth David Schoen <schoen at loyalty.org> | Qué empresa fácil no pensar en
>     http://www.loyalty.org/~schoen/   | un tigre, reflexioné.
>     http://vitanuova.loyalty.org/     |            -- Borges, El Zahir

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