About the film
Kodak BW 400 (BWC on the box, DXN on the cassette) is a Kodak chromogenic black-and-white negative film, ISO 400, 135 format, 24 exposures. The film edge reads “KODAK BW 400”. It belongs to the Kodak T400CN and BW400CN family, long discontinued. This roll is expired and carries no exact date. I have just the one.
Black and white, but C-41
The point of it: the film is black and white but is processed in ordinary colour C-41 along with colour negatives — at any lab, with no separate black-and-white chemistry. The image is formed by dye rather than silver, so the grain is soft and the tones are smooth. It is not meant for a classic black-and-white developer.
What to expect from an expired roll
Like any old ISO 400 film, this roll may have lost speed: expect possible fog, lower contrast and more visible grain. How much depends on storage, and nobody can say in advance. Scanned, the negative may carry a slight colour cast — converting the scan to monochrome removes it.
Shooting and developing
Give it extra exposure: ISO 100–200 rather than box speed. Chromogenic film handles overexposure well, so extra light is safer than too little. Processing is standard C-41; I can develop and scan it for you.
Specifications
- Type: black-and-white chromogenic negative
- Format: 135, 24 exposures
- Speed: ISO 400 (I suggest 100–200)
- Processing: C-41
- Expiry: expired, date unknown
- Stock: 1 roll
