[alt-photo] Re: Another tricolor...

[Paul Viapiano]

It goes to a municipal toxic disposal facility.

This is my personal solution in stewardship of my community and its 
environment.

Mike Ware explained to me about the breakdown of carcinogenic chromium in 
dichromates to a less harmful chromium (III) state after mixing with a 
reducing agent, and in that alkaline state precipitating to a pretty inert 
hydroxide. He also mentioned that he wouldn't opine on disposal or its 
ethics, if I recall.

Mike reads the list and I hope he'll correct me if I have it wrong. He is an 
awesome member of this community and I still feel bad about my remark from 
several months ago in which a secondhand hearsaid comment triggered a 
reaction from me not seen since I moved out of the old neighborhood ;-)

Paul



----- Original Message ----- 
From: "Doug Taylor" <dougtaylor13 at mac.com>
To: "The alternative photographic processes mailing list" 
<alt-photo-process-list at lists.altphotolist.org>
Sent: Wednesday, June 09, 2010 4:44 PM
Subject: [alt-photo] Re: Another tricolor...


> Paul,
>
> What do you do with the first wash water that gets bottled?
>
> Thanks, Doug
>
>
> On Jun 9, 2010, at 7:23 PM, Paul Viapiano wrote:
>
>> I'm not a pigment addict and couldn't tell you a real cad from a  fake 
>> one, and all those PY PR PB numbers or whatever? Well, who  knows about 
>> all that, I certainly don't.
>>
>> And, yes, cadmium is not a good thing for the environment. That's  why it 
>> was removed from gelatin silver paper and so many other  things years 
>> ago.
>>
>> But, like cadmium, potassium and ammonium dichromates are also 
>> devastating to the environment regardless of who tells you that they  are 
>> OK or benign. So that is why none of it, cadmium or dichromate,  goes 
>> down my drain. All first wash water gets bottled and all brush  cleaning 
>> water along with it. None of this stuff belongs in a public  drain, 
>> regardless of who tells you otherwise.
>>
>> Don't rely on experts. Experts said offshore underwater drilling was 
>> safe, too.
>>
>> Thanks, Judy, for this opportunity to get on my semi-annual soapbox.
>>
>> Paul
>>
>>
>>
>> ----- Original Message ----- From: "Judy Seigel" <jseigel at panix.com>
>> To: "The alternative photographic processes mailing list" 
>> <alt-photo-process-list at lists.altphotolist.org
>> >
>> Sent: Wednesday, June 09, 2010 3:54 PM
>> Subject: [alt-photo] Re: Another tricolor...
>>
>>
>>>
>>> On Wed, 9 Jun 2010, Marek Matusz wrote:
>>>
>>>>
>>>> Paul
>>>>
>>>> Cadmium is a very intense and opaque yellow. Did you use it as a  first 
>>>> layer? What was your registration method.
>>>>
>>>> For oil painting you can not substitute it with anything else. I 
>>>> wonder if I am missing something by not using it.
>>>>
>>>> Marek
>>>
>>> I speak here beyond my area of expertise, but re something I've  heard 
>>> so ioften and on such authority, I feel compelled to mention  it...
>>>
>>> If that IS real *cadmium,* it's pernicious & evil environmentally,  so 
>>> (presumably) even in small quantities shouldn't be added to ....  free 
>>> flowing water.
>>>
>>> (This has in the past been replied to as OK, benign, etc. on the  list, 
>>> but I've continued to hear/read about the horror of cadmium,  so mention 
>>> it again...)
>>>
>>> J.
>>>
>>>
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