[Frameworks] chemical disposal with septic system

[Francisco Torres]

How about that coffee based chem discuseed here before?
http://content.photojojo.com/tutorials/coffee-caffenol-film-developing/
https://www.youtube.com/watch?v=zYjOqcbBEco

'' I've just moved into my grandparents old house in rural New Brunswick,
and am planning on converting the basement bathroom into a darkroom...''
sounds like the first line of a hp lovecraft story.... :)


2016-09-01 13:04 GMT-04:00 Jesse Andrewartha <curiousollie at gmail.com>:

>
> With the dichromate bleach, I mix it with the exhausted developer prior to
> any disposal; this converts it from the hexavalent chromium(VI) ion, which
> is very water soluble and highly toxic, to the trivalent chromium(III) ion
> which is insoluble and while toxic, is much less harmful. The alkalinity of
> the developer also neutralizes the acid and I use a pH strip to confirm.
>
> -Jesse-
>
>
> On Aug 31, 2016, at 6:26 AM, Scott Dorsey <kludge at panix.com> wrote:
>
> >> Sounds like the most problematic chemicals are in bleach, fix, and
> hypoclear.
> >
> > No, no, hypo clear is fine.  It's just sulfite.  It's the hypo itself
> that
> > picks up the silver.
> > --scott
> >
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