Instax · ISO 800 B&W negative

Instax Mini Monochrome

B&W negative ISO 800 In production Instant instant · neutral B&W · high contrast

Fujifilm launched Instax Mini Monochrome in October 2016 as the first black and white emulsion in the Instax line. Before that, every Instax format was color only, which left a gap that The Impossible Project filled with its own slow, ivory-warm Silver Shade packs. Fuji's answer was the opposite: cool, neutral, contrasty, and finished in ninety seconds rather than the five to ten minutes a Polaroid sheet needs to come up.

The ISO is rated at 800, but that number is a label more than a meter setting. Instax cameras run fixed apertures and brief flash bursts, and the pack handles most of the metering job itself. If you are loading it into a hacked back or a pinhole rig, treat 800 as a starting point and test. Users on Photrio have settled on roughly ISO 400 to 1600 depending on whether the scene is overcast or sunny, and reciprocity creep starts faster on instant film than on conventional silver halide.

Grain is finer than you would expect from a sub-three-inch print. The image area is 62 by 46 mm in the credit-card frame, smaller than a 35mm negative, so you are not enlarging it the way you would a film negative. Tonality lands closer to a high-contrast scan than to a darkroom print. Highlights clip early and shadows fall off cleanly, which suits flash-lit street and party use and works against any subject that asks for gentle midtone gradation. Compared to current Polaroid B&W i-Type, the Instax neutral cast wins for anyone after monochrome that reads as monochrome rather than as faded sepia.

Film is sold only as ten-shot Mini cartridges. An Instax Wide Monochrome followed in 2017 for the larger format, but no 120 or 35mm equivalent exists.

The reciprocity exponent is 1.0. Zone Light Meter still runs its past-one-second routine on the metered reading, but a 30-second exposure stays at roughly 30 seconds at the pack. Instant film responds to temperature far more than to exposure time. Below about 5 degrees Celsius the chemistry stalls. Tuck a fresh pack inside a coat between frames if you are shooting cold.

How the app handles this stock

  • Box speed: ISO 800. Picker exposes pull/push chips so you can shoot it at any speed you want and the meter follows.
  • Reciprocity: No reciprocity correction needed; metered time is the shot time.
  • Expired film: if you load an old roll, set the expiry year and storage in the app and the ISO scales for you. B&W negative decay rates are baked in.

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