[pure-silver] Re: Mixing

  • From: Lee Carmichael <click76112@xxxxxxxxxxx>
  • To: pure-silver@xxxxxxxxxxxxx
  • Date: Fri, 16 Sep 2005 15:28:28 -0500

I found this on michaelandpaula.com and it was written by Sandy King the inventor of Pyrocat-Hd

Dan,

Sodium carbonate can indeed be substittued on a weight per weight basis in the Pyrocat-HD formula. The only problem is that sodium carbonate is much less soluble in water than potassium carbonate and you must adjust for this in mising the stock and working solutions.

For more information have a look at my article on Pyro developers in the Writings on Azo at this site.

Sandy King


Lee Carmichael




At 02:59 PM 9/16/2005, you wrote: 
crystalline maybe it!
It means decahydrate, which is equivalent to approx 27g of
anhydrous!


--- Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:

>
> ----- Original Message -----
> From: "titrisol" <titrisol@xxxxxxxxx>
> To: <pure-silver@xxxxxxxxxxxxx>
> Sent: Friday, September 16, 2005 12:07 PM
> Subject: [pure-silver] Re: Mixing
>
>
> > That is quite concentrated... can you make a half strength
> > solution and then use double of wht is required?
> > My guess is that you'll have to use warm water (60-70C) to
> > dissolve so much carbonate.
> > Besides, if my Handbok of CHemistry and Physics is
> > correct,
> > solubility should be aorund 46g/100 ml !!
> >
> >
> > --- Camclicker@xxxxxxx wrote:
> >
> >> I am going to mix up 100 mL of Pyrocat HD and solution B
> >> calls
> >> for  75g
> >> Potassium Carbonate to be mixed with 70 mL distilled
> >> water and
> >> topped  off to 100
> >> mL..
> >>
> >> The last time I tried mixing this dense a solution (84g
> >> Sodium
> >> Carbonate to
> >> 100mL water) I ended up with a glob of unusable, moist
> >> Sodium
> >> Carb.   Will the
> >> Potassium behave the same way as the Sodium, if so is
> >> there a
> >> trick to
> >> mixing dense solutions?
> >>
> >> Bruce
> >> Brooklyn, NY
> >> camclicker@xxxxxxx
> >> www.camclicker.com
> >>
>    I wonder what form of carbonate was specified in the
> _original_ formula. In the US carbonate is usually either
> anhydrous or monohydrated but many English formulas specify
> crystaline carbonate. If the original formula was written
> for crystaline carbonate and that specification got lost
> somewhere it could explain the problem.
>
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@xxxxxxxxxxxxx
>
>
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