Kodak Ektar 25

Kodak previewed Ektar 25 at Photokina in October 1988 and marketed it the following year as the sharpest color print film in the world. That claim was less ridiculous than it sounds. The emulsion used T-grain crystals coated in nine layers instead of the usual twelve, with DIAR couplers handling color correction during development. Reviewers at the time noted that focusing enlargements got difficult because the grain practically vanished. Some compared 35mm Ektar 25 prints to medium format.

The specifics that made the grain work also made the film hostile to mistakes. Latitude is narrow. Contrast runs high. A third of a stop of overexposure pushes highlights toward clipping, and shadow detail blocks faster than on Gold 100 or any negative film working photographers were used to. Kodak positioned it for serious amateurs, medical photography, photomicrography, and super-macro work where every grain particle was being enlarged ten or twenty times.

Color rendering was the public weakness. Early batches pushed yellows toward magenta and blues toward cyan, problems that improved in later runs but never disappeared. Skin tones required compromise. The film was a precision tool for subjects where detail mattered more than color accuracy, and a poor fit for wedding labs that wanted a forgiving 35mm negative.

Kodak ended production in 1994 and final stocks sold through 1997. The Royal Gold line replaced it. There is no current Ektar 25; the 2008 Ektar 100 carries the name but uses a different emulsion family. Freezer rolls turn up at estate sales, generally past thirty years old, showing the keeping issues that were baked in from the start.

Reciprocity exponent is 1.20. Zone Light Meter applies the correction past one second. A 30-second meter reading lands closer to a minute at the negative, which matters in macro and copy work where small apertures push exposures into the tripod range routinely. The narrow latitude makes the correction important: there is no room to absorb the error if you skip it.