> > > (3) What about combining different agents such as a combined 50/50
> > > bath of phosphoric acid (3%) and Kodak hypo clear .
>
> >Mixing phosphoric acid and hypo clear (specifically the sodium
> >sulfite in it) will produce sulphurous acid which will cause you to
> >leave your darkroom in a hurry.
>
> Actually,as I turns out, I did have to leave the darkroom in a hurry as my
> asthma suddenly flared up upon the addition of KHC and Phosphoric Acid and
> without warning and I couldn't breathe. I counldn't figure it out as my
> asthma is usually not a problem. But thanks to your posting, that is now
> understandable and I confirm your finding of the production of sulphurous
> Acid and the secondary symptoms of asthma and suffocation. Thanks for the
> valuable info.
>
> Stephen Harrison