[alt-photo] Re: Zia standard solutions

[Bob Barnes]

I agree with Colin absolutely.........


On Jul 21, 2010, at 7:22 AM, Colin wrote:

> Loris, please never dumb-down your posts, I get enough of that from  
> American media.  Personally I don't come here to make pictures, but  
> to learn about the process of making pictures. To use intelligent  
> language associate with process isn't showing off, if anything it  
> shows respect for the intellect and curiosity of readers of this list.
>
>
>
> ----- Original Message ----- From: "Loris Medici"  
> <mail at loris.medici.name>
> To: "'The alternative photographic processes mailing list'" <alt- 
> photo-process-list at lists.altphotolist.org>
> Sent: Wednesday, July 21, 2010 3:26 AM
> Subject: [alt-photo] Re: Zia standard solutions
>
>
>> You're welcome Terry.
>>
>> BTW, to clarify / correct a misunderstanding: My workshop /  
>> private lesson
>> suggestion wasn't for chemistry at all, it was "specifically"  
>> about "how to
>> to make the 'laypersons' understand the basic chemistry principles  
>> that we
>> 'may' use in creating alt. process artwork"... This makes part of  
>> all my
>> alt. process workshops - and I haven't a single "willing"  
>> participant that
>> didn't understand what I've teached to them, can't help the (non- 
>> willing)
>> others - I'm not Superman, in fact!
>>
>> Regards,
>> Loris.
>>
>>
>> -----Original Message-----
>> From: alt-photo-process-list-bounces at lists.altphotolist.org On  
>> Behalf Of
>> Terry King
>> Sent: Wednesday, July 21, 2010 12:07 PM
>> To: alt-photo-process-list at lists.altphotolist.org
>> Subject: [alt-photo] Re: Zia standard solutions
>>
>> Dear Loris
>>
>> Thank you for the explanation which would  need further  
>> explanation on a
>> workshop.  While I fully accept that an understanding of the  
>> chemistry is
>> important, remember that people have come to make pictures.
>>
>> Thank you too for the offer of a one to one explanation but I did  
>> look into
>> this when my daughter was doing her GCSEs in 1994.  I have not  
>> needed to use
>> it since as the concept of percentage dilutions is more easily  
>> grasped.
>>
>> Useful background would be a list of molar concentrations for the  
>> different
>> states of chemicals used in alt processes with a separate column  
>> relating it
>> to saturated solutions expressed in percentage terms. One could  
>> refer to
>> this list if someone wants to know what the dilution should be  
>> when, for
>> example,  only an anhydrous compound is available.   Is this  
>> something you
>> would like to prepare for our benefit ?
>>
>> Would it be helpful though in deciding which of the four states of  
>> EDTA
>> would be used in clearing a platinum print ?  As  I find that  
>> Willis's
>> method using 1% HCl is more effective, this would only be of academic
>> interest.
>>
>> Terry
>>
>>
>> -----Original Message-----
>> From: Loris Medici <mail at loris.medici.name>
>> To: 'The alternative photographic processes mailing list'
>> <alt-photo-process-list at lists.altphotolist.org>
>> Sent: Wed, 21 Jul 2010 8:43
>> Subject: [alt-photo] Re: Zia standard solutions
>>
>>
>> Molar concentration helps where there's more than one variant of the
>> compound in the market, for instance, at various hydration states.  
>> E.g.
>> citric acid = anhydrous / monohydrate, trisodium citrate =  
>> dihydrate /
>> pentahydrate, oxalic acid = anhydrous / dihydrate, palladium  
>> chloride =
>> anhydrous / dihydrate and so on... If you know the molarity  
>> (instead of w/v
>> %) of the solution(s) you want to mix, then you can use each and  
>> every
>> variant of the compounds, by making a simple ratio calculation in  
>> order to
>> learn the equivalent weight of the replacement variant. If you  
>> don't know
>> the molarity, you're bound to the "specific" variant the formula  
>> calls for,
>> and sometimes that's really a problem - when you can't find it for
>> instance...
>>
>> I do also give workshops Terry, would you like to take few lessons (a
>> private workshop) from me in this issue? (Explaining the  
>> principles to music
>> publishers and theology PhDs and such...) And that would be with  
>> the added
>> bonus of making visit to our beautiful Istanbul... ;) :P
>>
>> Regards,
>> Loris.
>>
>> -----Original Message-----
>> From: alt-photo-process-list-bounces at lists.altphotolist.org On  
>> Behalf Of
>> Terry King
>> Sent: Wednesday, July 21, 2010 2:32 AM
>> To: alt-photo-process-list at lists.altphotolist.org
>> Subject: [alt-photo] Re: Zia standard solutions
>>
>> ...
>>
>> Try explaining to us what advantages ' .7 m '  offers over the  
>> equivalent
>> percentage solution figure, then imagine explaining the same  
>> thing, and how
>> you would measure it, to a workshop containing music publishers  
>> and theology
>> PhDs who have come to make pictures.
>>
>> _______________________________________________
>> Alt-photo-process-list | http://altphotolist.org/listinfo
>>
>> __________ Information from ESET NOD32 Antivirus, version of virus  
>> signature database 5297 (20100721) __________
>>
>> The message was checked by ESET NOD32 Antivirus.
>>
>> http://www.eset.com
>>
>>
>
>
> __________ Information from ESET NOD32 Antivirus, version of virus  
> signature database 5297 (20100721) __________
>
> The message was checked by ESET NOD32 Antivirus.
>
> http://www.eset.com
>
>
>
> _______________________________________________
> Alt-photo-process-list | http://altphotolist.org/listinfo