[alt-photo] Re: casein

[Mark Nelson]

Could I get a copy of Paul's Standards?


Best Wishes,
Mark Nelson

Welcome to the Precision Digital Negatives Home!
PDNPrint : Precision Digital Negatives Forum
Mark I. Nelson Photography - Welcome

On Jun 16, 2012, at 8:06 AM, Alberto Novo wrote:

> Chris,
>> Please check my calculations and hopefully it will meet Paul's clarity standards:
> 
>> 180ml curds by volume + 120ml ammonia and water = 300ml solution
> 
> Yes 
>> 140g washed curds x .23 = 32.2g (fairly close to the 28 gram amount of protein listed on the container)
> 
> .23 is the yield of casein from dry powdered milk, not from washed curds: these last are "wet casein". Assuming a .23 factor it would mean that the wet curds have a 1.00-0.23 = 0.77 (77%) content of water, which (if I remember well) has not been yet measured. 
>> Oh, by the way, the most dilute formula of all the 32 formulas I have is from Enos himself, two of them, a 1% and a 1.3%, and I know one is combined with dry dichromate. Don't have enough information to see if the other one is, though, as he didn't specify.
> 
> If one is combined with dry dichromate, then you can assume that its concentration is double because it will not be further diluted 1:1. 
> Alberto
> www.grupponamias.com
> www.alternativephotography.com/wp/photographers/rodolfo-namias-group
> _______________________________________________
> Alt-photo-process-list | http://altphotolist.org/listinfo