[Alt-photo] Re: Palladium bleach

[KISS BOB]

DEAR MAREK,
      I do that for all reducers and toners...mix the 
working solution and dump after use but thanks for the 
instructions.  Looking forward to trying it when I have 
some free time.
               CHEERS!
                  BOB


On Sun, 21 Jul 2013 10:05:46 -0500
  Marek Matusz <marekmatusz at hotmail.com> wrote:
> One more thing. The ingredients of this reducer keep 
>reacting with each other so it should be made fresh and 
>discarded after use. I would not recommend storing it
> Marek
> Sent from my iPhone
> 
> On Jul 21, 2013, at 4:47 AM, "KISS BOB" 
><bobkiss at caribsurf.com> wrote:
> 
>> DEAR MAREK,
>>     Thanks for this procedure.  I have these ingredients 
>>which makes this more practical than trying to find (or 
>>import) hydrobromic acid here in Barbados.
>>     I will give it a try and report results but this 
>>might take some time as I am working flat out on a large 
>>print order.
>>                   THANKS!
>>                        CHEERS!
>>                               BOB
>> 
>> 
>> On Sun, 21 Jul 2013 01:20:14 +0000
>> Marek Matusz <marekmatusz at hotmail.com> wrote:
>>> Bob This is an approximate recipe that I have used. I 
>>>actually do not measure it carefully. Add to 1 liter of 
>>>water: about 20 cc of 12% K2Cr2O7 solution, followed by 
>>>about 2 grams of KBr, followed by about 10 cc of 
>>>concentrated sulfuric acid (be careful as addition of 
>>>concentrated sulfuric acid could cause local heating or 
>>>boling). Bath to be used outside or with good ventilation 
>>>as likely it involves bromine as a reactive agent. Use 
>>>gloves and goggles, and handle all chemicals with care. 
>>>Per-wet your print and immerse in the solution. Bleaching 
>>>should follow in 2-5 minutes, rinse with water and follow 
>>>with a bath of sulfite or metabisulfite to remove 
>>>(neutralize) any residual oxidizers. Marek 
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