Eastman Color Negative

Eastman Color Negative (ECN) is a photographic processing system created by Kodak in the 1950s for the development of monopack color negative motion picture film stock.

The original process, known as ECN-1, was used from the 1950s to the mid-1970s, and involved development at approximately 25°C for around 7–9 minutes. Later research enabled faster development and environmentally friendlier film and process (and thus quicker photo lab turnaround time).

This process allowed a higher development temperature of 41.1°C for around three minutes. This new environmentally friendly development process is known as ECN-2. It is the standard development process for all modern motion picture color negative developing, including Fuji and other non-Kodak film manufacturers. All film stocks are specifically created for a particular development process, thus ECN-1 film could not be put into an ECN-2 development bath since the designs are incompatible.

References

Hanson, Wesley T. Jr. "Color Negative and Color Positive Film for Motion Picture Use." Journal of the SMPTE, March 1952, Volume 58, pages 223–238.

Eastman Kodak

Subsidiaries	Chinon Industries Creo Kodak Express Qualex

Cameras	Brownie Canon EOS Canon EOS D2000 Canon EOS D6000 Canon EOS DCS 1 Canon EOS DCS 3 Cine-Kodak Instamatic Kodak 35 Kodak 35 Rangefinder Kodak Brownie Number 2 Kodak DC Series Kodak DC215 Kodak DC3200 Kodak DCS Kodak DCS 100 Kodak DCS 300 series Kodak DCS 400 series Kodak DCS Pro 14n Kodak DCS Pro SLR/c Kodak DCS Pro SLR/n Kodak DX7590 Zoom Digital Camera Kodak EasyShare Kodak Easyshare C1013 Kodak EasyShare C300 Kodak EasyShare C330 Kodak EasyShare C340 Kodak EasyShare C613 Kodak Easyshare C813 Kodak EasyShare CX4200 Kodak EasyShare CX4230 Kodak EasyShare DX4530 Kodak EasyShare DX6440 Kodak EasyShare DX6490 Kodak EasyShare P880 Kodak EasyShare V570 Kodak Pony 828 Kodak Retina Kodak Retina Reflex Kodak Retinette Kodak Signet Kodak Starflash Kodak Stereo Camera Kodak Vigilant camera Kodak Z612 Zoom Digital Camera Kodak Z712 IS ZOOM digital camera Starmatic

Camera film	120 film 126 film 127 film 135 film Disc film Ektachrome Ektar Kodachrome Kodacolor Filmmaking Still photography Kodak High-Speed Infrared Kodak Portra Kodak T-MAX Kodak Tri-X Technical Pan

Other products	Approval proofer Autographic film Carousel slide projector Cinema Digital Sound Cineon Colorama Eastmancolor Eastman Color Negative Eastman Color Positive KAF-10500 Keykode Kodacolor Technology Kodak Ektaprint Electronic Publishing System Kodak Gallery Kodak Photo Printer 6800 Kodak Proofing Software Kodak S-mount Kodak Ultima Kodascope KPR Picture CD Super 8 film Versamat

Media	Changing Focus The Brownies

Technical standards	DX encoding Four Thirds system Micro Four Thirds system

People	George Eastman

Places	Eastman Business Park Kodak Heights Kodak Park Railroad Kodak Photo Spot Kodak Picture Kiosk Kodak, Tennessee Kodak Tower

Court cases	Eastman Kodak Co v. Harold Worden Eastman Kodak Co. v. Image Technical Services, Inc. Vroegh v. Eastman Kodak Co.

Processes	RA-4 process

Organizations	Union of Kodak Workers

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