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Article CyanotypeSome camera manuals and editing software refer to producing Cyanotype images. These are monochrome images, often similar in appearance to sepia images but blue and white. These often differ considerably from earlier cyanotype images that had detail in white out of a blue background. Although today both are often referred to as cyanotype images, it's really the older image style that is, and others are just monochrome images produced as a blue and white tint rather than black and white or sepia.
Old Cyanotype Image of Hanewell Gardens (no more known) This is a very simple and cheap process, and all you need is a UV light source, the sun or artificial light is fine, and the basic chemistry toady is an 8.1% solution of potassium ferricyanide and 20% solution of ferric ammonium, mixed together. You can increase the sensitivity and contrast of the sensitive mix, by adding 6 drops of 1% potassium dichromeate for every 2ml of sensitizer solution. Developing/fixing is achieved with a 6% solution of household hydrogen peroxide (3%), in household use this is used as bleach. As these solutions are all very week, although normal care has to be taken, they are safe to play with and often the first alternative process people choose and can be used with children. You can add other items to modify it, and a lot of information can be found across the internet from those who see this as their chosen art form. There is a 68 page 10x8 inch book with colour illustrations of the process called 'Blueprint to Cyanotype' by Malin Fabbri and Gary Fabbri, Malin is from Sweden and Garry from the USA. The book is a result of a masters they did from Central St Martins School of Design in London on alternative photography. The first 22 pages, including the basic method, chemistry etc, as well as contents of the rest of the book can be downloaded for free, from the publishers. Creating Vintage Images - Old Look Photos
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