Re: PT/PD MOGULS, MAESTROS & GURUS

[Richard Knoppow <dickburk@ix.netcom.com>]

-----Original Message-----
>From: "Christina Z. Anderson" <zphoto@montana.net>
>Sent: Feb 13, 2007 10:40 PM
>To: "Alt, List" <alt-photo-process-L@usask.ca>
>Subject: Re: PT/PD MOGULS, MAESTROS & GURUS
>
>No,no, you didn't mistype--I was searching in 4th Ed Neblette to see if the 
>quote by Nadeau referenced something continued in the 4th Ed from the 3rd as 
>you said he referenced, and I couldn't find it there in a brief look 
>through.  I don't have the 3rd ed...
>Chris
>----- Original Message ----- 
>From: "John Roseborough" <platinumprinter@msn.com>
>To: <alt-photo-process-l@usask.ca>
>Sent: Tuesday, February 13, 2007 11:22 PM
>Subject: Re: PT/PD MOGULS, MAESTROS & GURUS
>
>
>> Christina,
>>
>> Maybe I mistyped. Nadeau used Neblette as his source. Not the other way 
>> around.
>>
>> Sorry for the confusion.
>>
>> John Roseborough
>> Platinum Printer
>>
>> ----- Original Message ----- 
>> From: "Christina Z. Anderson" <zphoto@montana.net>
>> To: "Alt, List" <alt-photo-process-L@usask.ca>
>> Sent: Tuesday, February 13, 2007 9:38 PM
>> Subject: Re: PT/PD MOGULS, MAESTROS & GURUS
>>
>>
>>> Thanks, John, for saving me time locating my source; you are exactly 
>>> correct.
>>>
>>> Eric, since you have hydrochloric acid (alas I was wrong, I only have 
>>> sulfuric, nitric, and phosphoric) and since pt/pd is your process of 
>>> choice, why don't you do a step wedge of each and tell us what you find? 
>>> BTW, John, I checked Neblette's 4th edition and I can't find the Nadeau 
>>> source there, even though there is a chapter on pt/pd.  Neblette quotes 
>>> Clerc and a couple others, tho.
>>>
>>> But Bob, back to your original question--do you even have HCL and can you 
>>> see if a dilute mix will do what you need it to do? Isn't HCL that pool 
>>> chemical stuff that one could get at a hardware store?
>>> Chris
>>>
>>>
>>> ----- Original Message ----- 
>>> From: "John Roseborough" <platinumprinter@msn.com>
>>> To: <alt-photo-process-l@usask.ca>
>>> Sent: Tuesday, February 13, 2007 11:59 AM
>>> Subject: Re: PT/PD MOGULS, MAESTROS & GURUS
>>>
>>>
>>>> Eric,
>>>>
>>>> In "The History and Practice of Platinum Printing" by Luis Nadeau (2nd 
>>>> edition) page 32, Nadeau states that HCl is to be used highly diluted to 
>>>> 1% - 1.5% for Platinum and 0.5% for Palladium.
>>>>
>>>> John Roseborough
   Nadeau generally knows what he is doing so I am somewhat surprized at his using Neblette as an authority. My experience is that Neblette had many errors in his books some of which got carried over from edition to edition. 
    BTW, I have the first 6 editions and the later _Reprography_ or whatever it was called, done after Neblette's death but named in his honor. Having said that I am not sure where all the editions are having quite a few books stored away. 





--
Richard Knoppow
dickburk@ix.netcom.com
Los Angeles, CA, USA