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I took a walk in the woods to clear my mind. There was a light that broke through the mist and gave me solutions...
As I mentioned a few days ago, I am currently looking into the production of ferric oxalate, not because I am dissatisfied with Bostick&Sullivan's product, but merely out of a thirst for knowledge.
I do not know the recipe of B&S, presumably it is iron(III)-nitrate and oxalic acid.
In my first attempt I followed the recipe of Pizzighelli and Hübl (ferric hydrate and oxalic acid). An interesting alternative, but time-consuming.
In the second attempt, it was iron(III)-nitrate and oxalic acid. The time required is similar, but with fewer steps.
The substance is not clearly defined, which makes it difficult to determine the exact content of oxalate solutions. The prevailing opinion is that the solution for the platinum process should contain 27% iron(III)-oxalate, for the Kallitypy 20%.
For practical purposes, the determination method using the specific gravity is sufficiently accurate, although any free oxalic acid present cannot be determined.
For the Kallitype, a specific gravity of 1.13 results in a solution of about 20%; for the comparison of the mode of action, the three oxalate solutions were brought to exactly this value. The measurement of the pH value showed clear deviations between the (acidic) solutions, which indicates different contents of free oxalic acid.
Paper: Hahnemühle Platinum Rag
Developer: Sodium Acetate
To obtain comparable densities, different exposure times were necessary.
From left to right:
B&S 3 minutes, P&H 2:30 minutes, Ox (iron nitrate) 2:15 minutes.
Wie schon vor einigen Tagen erwähnt, beschäftige ich mich momentan mit der Herstellung von Eisen(III)-Oxalat, nicht weil ich mit dem Produkt von Bostick&Sullivan unzufrieden wäre, sondern lediglich aus Wissensdrang.
Die Rezeptur von B&S ist mir nicht bekannt, vermutlich handelt es sich um Eisen(III)-Nitrat und Oxalsäure.
Bei meinem ersten Versuch bin ich nach der Rezeptur von Pizzighelli und Hübl (Eisen(III)-Hydrat und Oxalsäure) vorgegangen. Eine interessante Alternative, doch der Zeitaufwand ist hoch.
Beim zweiten Versuch waren es Eisen(III)-Nitrat und Oxalsäure. Der zeitliche Aufwand ist ähnlich hoch, allerdings bei weniger Arbeitsschritten.
Die Substanz ist nicht klar definiert, was es schwierig macht, den exakten Gehalt von Oxalat-Lösungen zu bestimmen. Nach vorherrschender Auffassung sollte die Lösung für den Platinprozeß 27% Eisen(III)-Oxalat enthalten, für die Kallitypie 20%.
Für die Praxis ist die Bestimmungsmethode über das spezifische Gewicht hinreichend genau, wobei allerdings ein eventuell vorhandener Anteil an freier Oxalsäure nicht festgestellt werden kann.
Für die Kallitype ergibt sich bei einem spezifischen Gewicht von 1.13 eine etwa 20% Lösung, für den Vergleich der Wirkungsweise wurden die drei Oxalatlösungen auf exakt diesen Wert gebracht. Die Messung des pH-Wertes zeigte deutliche Abweichungen zwischen den (sauren) Lösungen, was auf unterschiedlichen Gehalt an freier Oxalsäure hindeutet.
Papier: Hahnemühle Platinum Rag
Entwickler: Natriumacetat
Um vergleichbare Dichten zu erhalten, waren unterschiedliche Belichtungszeiten erforderlich.
Von links nach rechts:
B&S 3 Minuten, P&H 2:30 Minuten, Ox (iron nitrate) 2:15 Minuten
How many people can remember that red plastic container of bubble solution with the stick inside that you can blow through to make bubbles? This is thought I had when I rested my tripod on Cannon Beach on the Oregon Coast.
The weight of the sky and all of its fabulous sunset glory was a perfect way to cap off an incredible day in the Pacific Northwest of the USA.
Watching bubble solution just before it pops is an incredible experience! It's like living in the 1960's all over again!
"The thing the sixties did was to show us the possibilities and the responsibility that we all had. It wasn't the answer. It just gave us a glimpse of the possibility."
John Lennon
Hello
Having indicated I wasn’t going to title this shot my good Flickr friend Ela came up with a solution.
If you scroll down to her comment, she has kindly also put in a link to a performance by Sting and Rufus Wainwright.....
I am grateful for your input Ela. Thank you very much.
Thanks for visiting.
Have a good day out there.....
I came across a slew of small Kansas towns this past summer, but this one was wonderful and photogenic. Unfortunately, I can't remember its name. But I found this old Chrysler and couldn't resist.
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'Solution'
Camera: Mamiya RB67
Film: Harman Phoenix 200
Process: DIY ECN-2
Kansas
July 2025
You can download or view Macroscopic Solutions’ images in more detail by selecting any image and clicking the downward facing arrow in the lower-right corner of the image display screen. Three individuals of Macroscopic Solutions, LLC captured the images in this database collaboratively. Contact information: Mark Smith M.S. Geoscientist mark@macroscopicsolutions.com Daniel Saftner B.S. Geoscientist and Returned Peace Corps Volunteer daniel@macroscopicsolutions.com Annette Evans Ph.D. Student at the University of Connecticut annette@macroscopicsolutions.com
Si le problème a une solution, il ne sert à rien de s'inquiéter mais s'il n'en a pas, alors s'inquiéter ne change rien.
Your comments and favs are appreciated more than you know and do not go unnoticed
You have to pick your depth with these (not much) they move extremely quick almost like instantly they are facing in another direction. Anyway I must say this is the best Salticidae image I have made to date.
10 images covered the critical bits at F13 for me
Oh my that light!!
To anyone that sees some mad guy in the parks looking through the leaf litter intently if you ask me Ive already got it worked out to tell you I lost 2 bucks! Maybe then you will look with me and we find more of these blue eyed beauties!
Location , Wodonga , VIC , Australia 🇦🇺
Helicon Focus
Adobe PS
Topaz Labs Denoise AI
📷 OM Digital Solutions OM-1 Mark ii
🔎 OM SYSTEM M.Zuiko Digital ED 90mm F3.5 Macro IS PRO
Hand held Focus stack of 10 images
⚡ Godox V1O
️ CJ Diffuser V2 + CJ Lens Hood
🔋 100%
©Craig Loechel
Have a nice day
When it gets hot at midday, Timmy goes to our bed. He lies down so that I can lie comfortably next to him and stroke him 😊
Paws pressed against the wall gives the right body tension 😉
Happy Caturday 10.8.2024 "Weather"
Amsterdam - Admiralengracht / Van Kinsbergenstraat.
Residential block, built in 1926 to a design by Bureau Gulden and Geldmaker.
This block does have an unmistakable "Amsterdam School" appearance, especially due to the attractive corner solution.
Architects Gulden and Geldmaker excel in usually more sober designs, but they could indeed come up with expressive designs (amsterdamse-school.nl).
The Amsterdam School is a style of architecture that arose from 1910 through about 1930 in the Netherlands. The Amsterdam School movement is part of international Expressionist architecture, sometimes linked to German Brick Expressionism (Wp).
Summer is winding down, and my yard is alive with pollinators. Butterflies are passing through everyday and the plants in my yard- like the butterfly bush- are a solution for their need for a tasty solution of sugary nectar. For 125 in 2025 #88 Solution
Normally I chase this ginger Tom away but as he is doing a fine job of keeping the birds off my cherry tree, I will give him a free pass until August 🤔😉
Stay safe
View of the domes on St Mark's (San Marco) from the courtyard of the Doge's Palace (Palazza Ducale).
Bikini Open 2009 , Join and Come at Fitmart Mall every Wednesday and Saturday December 16, 19 , 23,Frand Finals on December 29 - 2009- Get a Beer and Free Entrance- Get a Seat for 20 Pesos, or Get a beer for 40 Pesos. Hurry Unlimitted Seat.
Bikini Open 2009 Fitmart Mall Fountain Area, Koronadal City South Cotabato - @ LOUIE D PHOTOGRAPHY by Infoactiv Solutions
Event: Bikini Open 2009 Fitmart Mall, Koronadal City South Cotabato
Venues: Koronadal City, Fitmart Mall
Camera: Canon 400D , NIKON D5000
Lens: 18-55mm, 50 mm, 200mm
Flash: Stage Light/Natural Light
Date: November 21, 2009
LOUIE D PHOTOGRAPHY
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This work is licensed under Creative Commons Attribution - Noncommercial-No Derivative Works 3.0
ALL RIGHTS RESERVED (C) 2009 LOUIE D. PHOTOGRAPHY
::glam:: Shape Piper for Catwa Strawberry @ MarketPlace
[ Session ] Piper (Catwa applier) @ eBento january
[ Session ] Mega Body Applier (Omega)
Avi-Glam Passional Eyes - 18 RARE Available at Epiphany
Baiastice Montmartre Hair
.euphoric ~ Luxe Lashes Applier ~[Catwa]
.euphoric ~Shikoba Face Tattoo Applier @ Fetish Fair
[MANDALA] Cheerful Earring-Wood
Flanders is a cyclist's paradise with many beautiful routes along the canals and rivers. Besides bicycles, you also see recumbent tricycles.
A recumbent tricycle is a solution that helps the rider lean back in a reclined position, distributing the weight over a wider area. This makes the ride much more comfortable and reduces strain and pressure on your back, shoulders, neck and wrists.
The Landsborough (right) and Clarke (far left) rivers, part of the Landsborough Wilderness Area, are separated by the Solution Range, at centre.
#BehindTheScenes
This month's entry on my 12 weeks project is about describing something behind the scenes. There is nothing better that expresses that than the moment that I dump my ideas into coding. Users only see the end result but the magic happens only when the developer codes the solution. I hope you like it :)
Thank you all for your appreciation.
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© 2016 Jordi Corbilla - All Rights Reserved.
Do not use any of my images without permission.
*Note that groups and albums are machine handled by Flickr Photo Analytics app and we apologise for any inconveniences caused.
You can download or view Macroscopic Solutions’ images in more detail by selecting any image and clicking the downward facing arrow in the lower-right corner of the image display screen.
Three individuals of Macroscopic Solutions, LLC captured the images in this database collaboratively.
Contact information:
Mark Smith M.S. Geoscientist
mark@macroscopicsolutions.com
Daniel Saftner B.S. Geoscientist and Returned Peace Corps Volunteer
daniel@macroscopicsolutions.com
Annette Evans Ph.D. Student at the University of Connecticut
annette@macroscopicsolutions.com
Título: The White Buffalo "Problem Solution"
El cielo de diciembre vencido por los pinceles serenos que
perfilan las mañanas en el Valle de Salazar... El crujir de la nieve bajo mis botas y el aroma de invierno que escapa de las chimeneas...