Ilfochrome, (formerly known as Cibachrome) is a dye destruction positive-to-positive photographic process used for the reproduction of slides on photographic paper. Dye destruction is a photographic printing process in which dyes embedded in the paper are bleached (destroyed in processing Photographic paper is paper coated with Light -sensitive chemicals used for making Photographic prints Photographic paper differs from photo papers The prints are made on a dimensionally stable tri-acetate polyester base, essentially a plastic base opposed to traditional paper base. Polyester is a category of Polymers which contain the Ester Functional group in their main chain Since it uses azo dyes on a polyester base, the print will not fade, discolor, or deteriorate for a long time. Characteristics of Ilfochrome prints are image clarity, color purity, more environmentally safe, as well as being an archival process able to produce critical accuracy to the original slide.

Contents 1 History 2 Advantages 3 References 4 External links

History

In the 1960s, the Cibachrome process was originally engineered by the Ciba-Geigy Corporation of Switzerland. Year 1960 ( MCMLX) was a Leap year starting on Friday (link will display full calendar of the Gregorian calendar. Novartis International AG is a multinational Pharmaceutical company based in Basel Switzerland that manufactures drugs such as Clozapine Switzerland (English pronunciation; Schweiz Swiss German: Schwyz or Schwiiz Suisse Svizzera Svizra officially the Swiss Confederation Later on the process was purchased by Ilford and dubbed the process "Ilfochrome," and is marketed as Ilfochrome Classic. Ilford Photo is a maker of Photographic films paper, and chemicals Colloquially, however the process is still referred to as "Cibachrome".

Ilford Ltd prior to 2004 comprised 2 main manufacturing sites, Mobberley in the UK, where most traditional products were made, and Freiberg in Switzerland where Ilfochrome and Ilfocolor papers were made, as well as the inkjet papers. The UK side was subject to a management buyout, and the Swiss operation (Ilford Imaging Switzerland GmbH) was sold to the Japanese Oji paper group in 2005. The Swiss plant retained the Ilford name, while the UK operation was inaugurated under the name HARMAN, taken from the name of the founder of the original Britannia Works, later to be Ilford Ltd. Harman Technology can still use the Ilford brandname and logo under license to Oji on previously existing products, while new products will carry the Harman name.

Advantages

The composition of the emulsion used in Ilfochrome prints is responsible for color purity, image clarity, being environmentally friendly, and archival. An emulsion ( IPA: /ɪˈmʌlʃən/ is a mixture of two Immiscible (unblendable liquids Unlike Type R processes by Kodak, Fuji, and others, Ilfochrome does not have dyes in the chemistry but rather in the emulsion. A Type R print refers to a positive-to-positive Photographic print made on reversal -type color Photographic paper. Eastman Kodak Company ( is an American multinational Public company which produces imaging and photographic materials and equipment is a Japanese company known for its Photographic film and Cameras Fujifilm is the world’s largest photographic and imaging company. Azo dyes, which provide stable vivid colors, are embedded in the Ilfochrome emulsion are bleached out in processing. Azo compounds are compounds bearing the Functional group R-N=N-R' in which R and R' can be either Aryl or Alkyl. Since the dyes are in the emulsion rather than in the chemistry, the image is also much sharper and clearer because the dyes create an anti-light scattering layer which keeps the reflected image from being diffused when viewed. Although not completely environmentally safe, it is far more friendly than other processes because the toxic dyes begin in the emulsion and are removed rather than contained in disposable chemistry. As the colors formed from the azo dye are far more stable, the prints made from the process are archival and insisted on by galleries and art collectors as they will not fade in normal light.

As of 2006, Ilford continues to produce Ilfochrome Classic in front-lit products, back-lit products, micrographic film, and the required chemistry. Year 2006 ( MMVI) was a Common year starting on Sunday of the Gregorian calendar.

A somewhat "alternative" use of Ilfochrome is that of using the paper directly inside a large format or ultra large format camera. Large format describes large Photographic films large cameras View cameras (including Pinhole cameras and processes that use a film or digital sensor Ultra Large Format (ULF photography refers to Photography using Cameras producing negatives larger than 8x10" (20x25cm This creates a unique artefact, though the image appears reversed left-right. When techniques similar to this were used in the past (e. g. , daguerrotypes) photographers used 45 degree mirror add-ons that - when put on a lens - would reverse the image sideways thus recreating the correct view on the in-camera paper/plate. ^[1][2]

References

External links

• Official Ilfochrome Webpage
• Ilford Official Website

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