What Is the Cyanotype Process?
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Understanding the Basics of Electron Transfer and Cyclic Voltammetry of Potassium Ferricyanide - an Outer Sphere Heterogeneous Electrode Reaction
Sayyar Muhammad et al., J.Chem.Soc.Pak., Vol. 42, No. 06, 2020 813 Understanding the Basics of Electron Transfer and Cyclic Voltammetry of Potassium Ferricyanide - An Outer Sphere Heterogeneous Electrode Reaction 1Sayyar Muhammad*, 1Ummul Banin Zahra, 1Aneela Ahmad, 2Luqman Ali Shah and 1Akhtar Muhammad 1Department of Chemistry, Islamia College Peshawar, Peshawar-25120, Pakistan. 2National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar-25120, Pakistan. [email protected]* (Received on 5th December 2019, accepted in revised form 11th August 2020) Summary: Understanding and controlling the processes occurring at electrode/electrolyte interface are very important in optimizing energy conversion devices. Cyclic voltammetry is a very sophisticated and accurate electroanalytical method enables us to explore the mechanism of such electrode reactions. In this work, electrochemical experiments using cyclic voltammetry were performed in aqueous KCl solution containing potassium ferricyanide, K3[Fe(CN)6] at a glassy carbon disc working electrode and the mechanism of the reactions is highlighted. The CV 3− 4− measurements shows that the ferricyanide [Fe(CN)6] reduction to ferrocyanide [Fe(CN)6] and the reverse oxidation process follows an outer sphere electrode reaction mechanism. Voltammetry analysis further indicates that the reaction is reversible and diffusion controlled one electron transfer 4− electrochemical process. The peak currents due to [Fe(CN)6] oxidation and the peak current due to 3− [Fe(CN)6] reduction increase with increase of concentration and scan rate increase. The diffusion co-efficient was determined by applying Randles-Sevcik equation. The report could be helpful for university students to understand the basics of electron transfer in redox processes and cyclic voltammetry. -
Potassium Ferricyanide Safety Data Sheet According to Federal Register / Vol
Potassium Ferricyanide Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations Date of issue: 12/21/2004 Revision date: 01/31/2018 Supersedes: 01/31/2018 Version: 1.1 SECTION 1: Identification 1.1. Identification Product form : Substance Substance name : Potassium Ferricyanide CAS-No. : 13746-66-2 Product code : LC19040 Formula : K3FeC6N6 1.2. Recommended use and restrictions on use Use of the substance/mixture : For laboratory and manufacturing use only. Recommended use : Laboratory chemicals Restrictions on use : Not for food, drug or household use 1.3. Supplier LabChem Inc Jackson's Pointe Commerce Park Building 1000, 1010 Jackson's Pointe Court Zelienople, PA 16063 - USA T 412-826-5230 - F 724-473-0647 [email protected] - www.labchem.com 1.4. Emergency telephone number Emergency number : CHEMTREC: 1-800-424-9300 or 011-703-527-3887 SECTION 2: Hazard(s) identification 2.1. Classification of the substance or mixture GHS-US classification Not classified 2.2. GHS Label elements, including precautionary statements Not classified as a hazardous chemical. Other hazards not contributing to the : None. classification 2.4. Unknown acute toxicity (GHS US) Not applicable SECTION 3: Composition/Information on ingredients 3.1. Substances Substance type : Mono-constituent Name Product identifier % GHS -US classification Potassium Ferricyanide (CAS-No.) 13746-66-2 100 Not classified (Main constituent) Full text of hazard classes and H-statements : see section 16 3.2. Mixtures Not applicable SECTION 4: First-aid measures 4.1. Description of first aid measures First-aid measures general : Never give anything by mouth to an unconscious person. -
Cyanotypes Handout
Cyanotypes Background/Context Cyanotype is a photographic printing process that produces a cyan-blue print. Engineers used the process well into the 20th century as a simple and low-cost process to produce copies of drawings, referred to as blueprints. The process uses two chemicals: ferric ammonium citrate and potassium ferricyanide. Equipment needed Ferric Ammonium Citrate Scales 3 containers for mixing (ideally brown glass bottles) Potassium Ferricyanide Measuring Jug Plastic Spoons Protective Equipment: Facemask, Brushes & Sponges Glass or Clear Perspex Gloves & Apron Sunlight or UV Source Water trays Heavy papers approx 300 gsm Found materials such as threads, Acetate/Tracing Paper Black pens/china graph pencils leaves, feathers, buttons etc Mixing the Chemicals Using a plastic spoon mix 25g of ferric ammonium citrate with 100ml of water. In a separate container mix 10g potassium ferricyanide with 100ml water. Mix the two solutions together with a 1:1 ratio immediately before use. Chemical solutions can be stored separately in glass brown bottles for months but ammonium ferric citrate will grow mould which will need sieving out. Coating the Papers Wear gloves when applying the solution. In a dark room or room with a low level light the solution can be applied to paper using a brush - or for even coverage use a sponge brush. Keep the coated papers in the dark and ideally leave to dry flat. Dry coated papers can be kept in a light sealed black bag until exposed in sunlight or using a UV light box. Exposing your Image Using sunlight: Place your objects or acetate image on top of the coated side of the paper and place a piece of glass or clear perspex on top. -
Cyanotype Detailed Instructions
Cyanotype Detailed Instructions Cyanotype Formula, Mixing and Exposing Instructions 1. Dissolve 40 g (approximately 2 tablespoons) Potassium Ferricyanide in 400 ml (1.7 cups) water to create STOCK SOLUTION A. Allow 24 hours for the powder to fully dissolve. 2. Dissolve 100 g (approximately .5 cup) Ferric Ammonium Citrate in 400 ml (1.7 cups) water to create if you have Chemistry Open Stock START HERE STOCK SOLUTION B. Allow 24 hours for the powder to fully dissolve. If using the Cyanotype Sensitizer Set, simply fill each bottle with water, shake and allow 24 hours for the powders to dissolve. 3. In subdued lighting, mix equal parts SOLUTION A and SOLUTION B to create the cyanotype sensitizer. Mix only the amount you immediately need, as the sensitizer is stable just 2-4 hours. if you have the Sensitizer Set START HERE 4. Coat paper or fabric with the sensitizer and allow to air dry in the dark. Paper may be double-coated for denser prints. Fabric may be coated or dipped in the sensitizer. Jacquard’s Cyanotype Fabric Sheets and Mural Fabrics are pre-treated with the sensitizer (as above) and come ready to expose. 5. Make exposures in sunlight (1-30 minutes, depending on conditions) or under a UV light source, placing ob- jects or a film negative on the coated surface to create an image. (Note: Over-exposure is almost always preferred to under-exposure.) The fabric will look bronze in color once fully exposed. 6. Process prints in a tray or bucket of cool water. Wash for at least 5 minutes, changing the water periodically, if you have until the water runs clear. -
'Cyanotype and Anthotype: Eco-Patterning with Mineral and Natural Dyes.' Proceedings: International Textile & Costume Congress
Cyanotype and Anthotype: Eco- patterning with mineral and natural dyes Item Type Article Authors Wells, Kate Citation Wells, K. (2015) 'Cyanotype and Anthotype: Eco-patterning with mineral and natural dyes.' Proceedings: International Textile & Costume Congress. 2015. Between Worlds: Innovation and Design in Textiles and Costume. Marmara University, Istanbul: 145 Publisher International Textile and Clothing Congress ITCC Journal Proceedings of the 3rd International Textiles & Costume Congress - ITCC 2015 Download date 28/09/2021 17:18:38 Link to Item http://hdl.handle.net/10545/601182 ‘CYANOTYPE AND ANTHOTYPE: ECO - PATTERNING WITH MINERAL AND NATURAL DYES.’ Wells Kate University of Derby College of Arts Markeaton Street Campus Derby DE22 3AW Abstract: The paper outlines collaborative research between two different disciplines: That of textile design and early colouration methods with historical photographic imaging techniques. The project considers the symbiotic relationship between natural plant extracts with ‘Anthotypes’ and raised colours specifically ‘Prussian Blue’ with ‘Cyanotypes’. The aim of which, is to consider the question: Could this kind of photographic image making be applied as a future, sustainable method of design generation, colouration and patterning of fabric for fashion and interiors? Looking at the substantive and the fugitive properties of the colouration materials along side different light wavelengths and analysing the success or failure of using Anthotypes and Cyanotype as an alternative sustainable surface design process can be attained: A form of Eco-patterning that relies upon light and natural substances/dyes not synthetic dyes as the colouring medium. 1. Introduction This paper discusses a research project, which considered the correlation between Natural and Mineral dyes with early 19th Century photographic processes ‘Cyanotypes’ and ‘Anthotypes’ as a form of eco-patterning that relies upon light and natural subsantnces as the colouring medium. -
Making Photos with the Sun
MAKING PHOTOS WITH THE SUN For her exhibition at Storm King this year, artist Kiki Smith made this artwork, called river light. It is made up of nine brilliant blue flags arranged in a circle. Each flag is an image of sunlight sparkling on water. Kiki took these images from videos she made of the East River in New York City as she walked from her apartment to a nearby pool to swim. To make her flags, Kiki Smith used an almost 180-year- old photography process called cyanotype. A cyanotype is a kind of photograph made without a camera. It is made by coating paper or fabric in chemicals that change color when exposed to light. Then, an object or a transparent photo negative is placed on the treated paper and exposed to the sunlight. Everywhere the sunlight reaches, the paper turns deep blue, but everywhere that it is covered up, where the sun does not reach, stays white. Originally, cyanotypes were used to copy text and architectural drawings. Even though they’re no longer copied by cyanotype, that’s why building plans are still sometimes called blueprints! Anna Atkins was the first person to use the cyanotype process to record other kinds of things beside text and building plans. In 1843 she began placing algae and plant specimens directly onto cyanotype paper and exposing them to light to record their exact size and shape. She included over three hundred of these photograms, or photos made by placing objects directly onto photo-sensitive paper, in the very first book illustrated entirely with photographs, Photographs of British Algae: Cyanotype Impressions. -
Cyanotype Faqs
Cyanotype FAQs FAQs What is cyanotype? Cyanotype is an antique photographic printing process distinctive for producing Prussian blue monochromatic prints. Developed in the mid-19th century, cyanotype was quickly embraced as an inexpensive method for reproducing photo- graphs, documents, maps and plans (hence the enduring architectural term “blueprint”). Famously, it was also used by Anna Atkins and other field biologists for indexing plant specimens—the first photograms ever made! Cyanotype is an extremely forgiving photographic process, easy to do, safe and inexpensive. As one of the earliest photographic pro- cesses ever developed, it is still favored among alternative process enthusiasts and is often the first chemistry explored in alternative photo classes. Is it permanent? Yes, cyanotype prints are archival. However, yellowing may occur if prints are exposed to phosphates or alkaline environ- ments so, cyanotype fabrics must be laundered in cold water using non-phosphate detergents. Over-washing may also cause the print to fade. Use care while handling cyanotype prints, as sweat and hand oils may also cause discoloration. If fading occurs over time, washing the print in a dilute bath of hydrogen peroxide can usually restore it to its original intensity. Is Jacquard’s Pretreated Cyanotype Fabric sided? Prints can be made on either side of Jacquard’s Pretreated Cyanotype Fabrics. However, being a cotton sateen, the sides are different. One side of the fabric is slightly reflective and shiny. This is the print side. Look closely at the fabric to determine which side is the print side. Can I make cyanotype prints on paper and fabric? How about wood? Yes, any natural surface can be treated with the cyanotype sensitizer, including silk, cotton, wool, hemp, linen, canvas, paper, leather and wood. -
Alternative Process Photography: Beyond Digital and Film Laura Michaud University of Rhode Island, Laura [email protected]
University of Rhode Island DigitalCommons@URI Senior Honors Projects Honors Program at the University of Rhode Island 2017 Alternative Process Photography: Beyond Digital and Film Laura Michaud University of Rhode Island, [email protected] Follow this and additional works at: http://digitalcommons.uri.edu/srhonorsprog Part of the Art and Design Commons, Chemistry Commons, Fine Arts Commons, History of Art, Architecture, and Archaeology Commons, Nonfiction Commons, and the Photography Commons Recommended Citation Michaud, Laura, "Alternative Process Photography: Beyond Digital and Film" (2017). Senior Honors Projects. Paper 545. http://digitalcommons.uri.edu/srhonorsprog/545http://digitalcommons.uri.edu/srhonorsprog/545 This Article is brought to you for free and open access by the Honors Program at the University of Rhode Island at DigitalCommons@URI. It has been accepted for inclusion in Senior Honors Projects by an authorized administrator of DigitalCommons@URI. For more information, please contact [email protected]. Laura Michaud THE ALT PROCESS COOKBOOK A simplified way to making beautiful non-traditional photographic prints. THE ALT PROCESS COOKBOOK Laura Michaud Special Thanks to: Zoey Stites Ron Onorato Annu Matthew Jill Enfield Laurie Sherman Steve Michaud Brian Podgurski Casey Miller Alex Murdock Porter Dolan Kim Manjuck Corey Favino Heidi Allen Anna Sherman Thank you all so much for all your help and support. Table of Contents 1. A Brief Overview of Photography…………………………….………..1 2. Making The Negative…………………………………...……....….…..5 -
Make Cyanotype Prints
Make Cyanotype Prints Cyanotype prints are photographs characterized by their easily recognized blue tones. The process offers a way to make pictures with minimal equipment and chemistry. Make your own cyanotype prints at home with this guide from Paper Conservator Tatiana Cole. With adult supervision, artists as young as 6 can make their own prints. A BIT OF HISTORY Sir John Frederick William Herschel (British, 1792-1871) introduced the cyanotype photographic process approximately three years after William Henry Fox Talbot announced his discovery of photography on paper. The cyanotype process was primarily used from the 1880s Harrington, C.S., View from the Train to the 1950s as a simple, inexpensive method of producing Despatchers [sic] Office, 1898. Cyanotype. Boston & Albany R.R. - blueprints without a camera. It was also a popular way to Boston Yard Collection. Boston document botanical specimens. Athenæum. The cyanotype process was used to make quick proofs of negatives before an image was printed using other more expensive processes using silver or platinum. It was not considered acceptable for portrait or landscape photography. Read more: Schaaf, Larry. Out of the Shadows: Herschel, Talbot & the Invention of Photography. New Haven: Yale University Press, 1992. See more: View cyanotypes of the Boston and Albany Railroad Company’s Boston Yard and the construction of South Station in the Boston Athenæum’s digital collections. ABOUT THE CYANOTYPE PROCESS The cyanotype process is based on the light-sensitive properties of iron. Two soluble iron compounds—potassium ferricyanide and ferric ammonium citrate—are mixed together with water and used to coat a surface with natural fibers, such as paper or fabric. -
Spencer Museum of Art Art Cart at Home: Cyanotypes
Spencer Museum of Art Art Cart at Home: Cyanotypes Anna Atkins Barbara Kasten Annie Wight Robinia pseud-acacia America untitled (blue abstract - crinkled netting) untitled (still life) circa 1851–1854 1974 1900 Spencer Museum of Art Spencer Museum of Art Kenneth Spencer Research Library This activity blends art and science to explore the photographic process called a cyanotype. Look at the examples above from the Spencer Museum of Art and Kenneth Spencer Research Library’s collections and learn more about each image below. What is a cyanotype? A cyanotypes is a type of photograph that’s easy to spot by its blue, or cyan, color. To make a cyanotype, a piece of paper is coated with a mixture of chemicals that are sensitive to sunlight (specifically ultraviolet radiation). Sunlight triggers a chemical reaction to form Prussian blue. When found objects or photographic negatives are placed directly on top of the treated paper and exposed to sunlight, areas that are covered will remain white, while anything not covered will turn blue. After exposure, the print is rinsed in water and the photograph is hung to dry. Cyanotypes go by several other names: blueprint, Prussian blue, ferroprussiate, sun print, photogram. They were most commonly used between 1842 and 1950. Anna Atkins: Between 1843 and 1853, Atkins used the cyanotype process to create her botanical study British Algae: Cyanotype Impressions, the first to be photographically printed and illustrated. What do you notice first? What details do you see? Barbara Kasten: Kasten used a piece of netting to create this image. What objects do you have at home that might make interesting shapes and patterns? Annie Wight: This cyanotype is from a collection of photographs depicting Wight's home in Douglas County, Kansas, showing plants around the yard and still lifes in the home. -
We Have Seen That Back in the Early Days of Scientific Photographic
We have seen that back in the early days of scientific photographic progression people were constantly experimenting in ways of capturing a permanent image using chemicals. The Cyanotype process is one of them. There are two main chemicals required for making a Cyanotype image, Ammonium Ferric Citrate (light sensitive iron salt) and Potassium Ferricyanide (red salt). This is the same formula developed by Sir John Herschel. In fact, he discovered sodium thiosulfate to be a solvent of silver halides in 1819, and informed Talbot and Daguerre of his discovery that this "hyposulphite of soda" ("hypo") could be used as a photographic fixer, to "fix" pictures and make them permanent, after experimentally applying it thus in early 1839. The blue color of the cyanotype print is the result of the reaction of ferrous ions to the photo reduction of ferric ammonium citrate in combination with potassium ferricyanide. Cyanotype is based on the sensitivity of ferrous salts to light. The sensitive layer contains iron ammonium citrate and potassium hexacyanoferrate(II)). Daylight contains a certain portion of UV radiation and this reduces the iron(III) ions in these compounds to iron (II) ions. This produces compounds of blue – on the one hand Prussian blue – iron (III) hexacyanoferrate (II), and on the other Turnbull's blue – ferrous ferricyanide. Both these colors are bright blue and the picture is made up of their combination in the given ratio. When iron ( Fe, from the Latin "Ferrum") is chemically combined with other elements, its atoms acquire a positive charge by transferring two or three of their orbiting negative electrons onto atoms of other elements. -
United States Patent Office Patented June 26, 1973 2 Preferably the Alkali Metal Ferricyanide Is Added to the 3,741,767 Emulsion After Emulsification Step
3,741,767 United States Patent Office Patented June 26, 1973 2 Preferably the alkali metal ferricyanide is added to the 3,741,767 emulsion after emulsification step. PHOTOGRAPHIC EMULSIONS CONTAINING The preferred alkali metal ferricyanide is potassium ALKAL METAL FERRCYANDES ferricyanide. Most preferably the alkali metal ferricyanide John Harold Baylis and Anthony John Bond, Ilford, Eng is added to the emulsion as an aqueous solution. land, assignors to Ilford Limited, Ilford, England 5 No Drawing. Filed June 22, 1971, Ser. No. 155,611 It is thought that the step of adding the alkali metal Claims priority, application Great Britain, June 26, 1970, ferricyanide to the emulsion has the effect of reducing 31,166/70 the number of internal sensitivity centres which are formed at C. G03c 1/02 during the physical ripening stage. Thus, the process of U.S. C. 96-94 7 Claims the present invention leads to emulsions having reduced O internal sensitivity and in some cases yields emulsions having improved properties in regard to speed and/or contrast. However, in photographic emulsions wherein the ABSTRACT OF THE DISCLOSURE ratio of internal sensitivity to external sensitivity is normal According to the present invention an alkali metal ly very low, it is very difficult to show any improvement ferricyanide is added to a gelatin silver halide emulsion 15 because the reduction in the internal sensitivity of the prior to flocculation. Emulsions having reduced internal emulsion is of little practical importance. sensitivity are obtained. Therefore, in