Эктахром: История плёнки Kodak

Brand name of a Kodak film

Ektachrome is a brand name owned by Kodak for a range of transparency, still and motion picture films previously available in many formats, including 35 mm and sheet sizes to 11 × 14 inch size. Ektachrome has a distinctive look that became familiar to many readers of National Geographic, which used it extensively for color photographs for decades in settings where Kodachrome was too slow. In terms of reciprocity characteristics, Ektachrome is stable at shutter speeds between ten seconds and 1/10,000 of a second.

Ektachrome, initially developed in the early 1940s, allowed professionals and amateurs alike to process their own films. It also made color reversal film more practical in larger formats, and the Kodachrome Professional film in sheet sizes was later discontinued. High Speed Ektachrome, announced in 1959 provided an ASA 160 color film, which was much faster than Kodachrome. In 1968, Kodak started offering push processing of this film, allowing it to be used at ASA 400. Whereas the development process used by Kodachrome is technically intricate and beyond the means of amateur photographers and smaller photographic labs, Ektachrome processing is simpler, and small professional labs could afford equipment to develop the film. Many process variants (designated E 1 through E 6) were used to develop it over the years. Modern Ektachrome films are developed using the E 6 process, which can be carried out by small labs or by a keen amateur using a basic film tank and tempering bath to maintain the temperature at 100 °F (38 °C). Several years before Ektachrome's discontinuation, some of Kodak's consumer E 6 films were rebranded as Elite Chrome. In late 2009, Kodak announced the discontinuation of Ektachrome 64T (EPY) and Ektachrome 100 Plus (EPP) films, citing declining sales. On February 4, 2011, Kodak announced the discontinuance of Ektachrome 200 on its website. On March 1, 2012, Kodak announced the discontinuance of three color Ektachrome films. In December 2012 Kodak announced its discontinuance of Ektachrome 100D color reversal movie film in certain formats. By late 2013, all Ektachrome products were discontinued. On September 25, 2018, Kodak announced that the 35 mm format of Ektachrome was again available, while Super 8 and 16 mm motion picture versions would be available later.

Although Kodachrome is often considered a superior film due to its archival qualities and color palette, advances in dye and coupler technology blurred the boundaries between the differing processes, along with Kodak having abandoned Kodachrome research and development after the mid 1990s. Furthermore, the developing of Kodachrome always required a complex, fickle process requiring an on site analytical lab and typically required a turnaround of several days to allow for shipping times. By contrast, small professional labs have been able to process Ektachrome on site since the 1950s, with product safety and effluent discharge having been drastically improved since the 1970s, when Kodak reformulated their entire color chemistry lineup. It is even possible for amateur labs to process Ektachrome within an hour using a rotary tube processor (made by Jobo, WingLynch or PhotoTherm), sink line, or even by hand inversion in a small drum and E 2, E 4, and E 6 processing chemistry kits were sold for home darkrooms.

The Washington (W) Processing Lab operated between 1967 and July 1999. The lab facility was located in Montgomery County at the address of 1 Choke Cherry Road, Rockville, Maryland. The Palo Alto (P) California Processing Lab was located at 925 Page Mill Road, Palo Alto, California. The Rochester (R) New York Processing Lab was located at Kodak Park in Rochester, New York. There were also Kodak processing laboratories in other locations, including Chicago, (Illinois), Hollywood, (California H), Atlanta (Georgia), Findlay (Ohio), Toronto (Canada) and Hemel Hempstead (England).

On January 5, 2017, Kodak Alaris announced that Ektachrome would return in both ISO 100 35 mm still frame and Super 8 motion picture formats, before the end of the year. However, the release date was later pushed to 2018 after it was discovered certain materials used in its manufacture were now unavailable, requiring a reformulation. Kodak will manufacture the film and market the Super 8 version. Kodak Alaris will market the 35 mm still version. The Super 8 version was exhibited at the 2018 Consumer Electronics Show, and was named Ektachrome 100D 7294. In fall 2018, Kodak released the newly formulated Ektachrome with 35 mm format being the first to arrive on September 25 and in Super 8 format on October 1. On June 1, 2019, Kodak Alaris announced a wide coating trial of Ektachrome in 120 format for the end of July. Previously, in January 2019, a Kodak Alaris representative indicated work was progressing on Ektachrome in both 120 and larger formats. This project reached completion when, on December 10, 2019, Kodak Alaris announced the availability of Ektachrome E100 in a 120 format 5 roll propack and a 4 × 5 box of 10 sheets.

Ektachrome has occasionally been used as a motion picture film stock, particularly in the late 1970s and early 1980s. It has been featured in productions such as in the 1999 film Three Kings and the 2006 film Inside Man, in which each used cross processing in C 41 color negative chemistry to give a unique appearance. It was also used in the 1998 film Buffalo '66, although it was processed regularly for this. American filmmaker Spike Lee is known for using Ektachrome for some of his iconic works until Kodak discontinued its motion picture format. Upon the revival of the 16 mm format of Ektachrome, Lee used the film stock again in some of the scenes on his 2020 critically acclaimed film, Da 5 Bloods. The Ektachrome in super 8mm format was also used in the film to simulate the footages captured by the actor Norman Lewis. For the second season of the American TV series Euphoria, Kodak revived the 35 mm motion picture format of Ektachrome at the request of the filmmakers. American singer songwriter Taylor Swift also used the newly revived 35 mm motion picture Kodak Ektachrome alongside Kodak Vision 3 for her 2021 music video All Too Well: The Short Film. The British indie rock band Arctic Monkeys used motion picture 16 mm Ektachrome to record the music video for the single Body Paint. Ektachrome was also used to photograph sections of the critically acclaimed film Poor Things, cinematographer Robbie Ryan noted that the unique colour produced by the stock was referenced throughout the grading process to inform the film's overall visual style.