Colour & Ink intermediate richeditorialcontrolled

Duotone and Tritone

Duotone and Tritone example frame

One photograph printed from two or three plates to extend tonal range beyond single-colour black.

What it does

A single black plate cannot hold both shadow detail and smooth midtones, so a duotone adds a second ink carrying the midtones while black carries the shadows, each with its own curve. A tritone adds a third for highlights. It is not a colour tint applied over greyscale: the separations differ, which is why a real duotone has depth a tinted image does not. Album sleeves and annual reports used it constantly before cheap four-colour.

The prompt

[Subject] as a printed duotone. Black plate carrying the shadow detail and a warm sepia second plate carrying the midtones, each with its own separation curve so the two do not simply overlay, giving depth a tinted greyscale cannot. Rich blacks, warm mid-greys, clean paper-white highlights. Fine 150-line screen on matte coated stock.

Replace [Subject] with what you are shooting. Everything else is deliberate: the gear, stock and lighting are what push a generator towards this look.

Works well in

Midjourney, FLUX

Pairs with

Two-Ink DisciplineRisograph Duotone

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