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By Philip Lawson

Digital Imaging 5. The Basics - Scanning and Printing The Master Image Working with Layers Working with Channels Black and White. By Philip Lawson. Greyscale. By Black and White we really mean a Monochromatic Greyscale Image Or a Duotone Or a Line Drawing. Greyscale Printing.

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By Philip Lawson

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  1. Digital Imaging 5 The Basics - Scanning and Printing The Master Image Working with Layers Working with Channels Black and White By Philip Lawson

  2. Greyscale • By Black and White we really mean a Monochromatic Greyscale Image • Or a Duotone • Or a Line Drawing

  3. Greyscale Printing • Printing Greyscale images is Problematic • Printing in Colour Inks leads to • Colour casts • Lack of decent blacks • Printing in Black Ink leads to • Lack of decent gradation • Best to use Greyscale Ink Printers • Differing density inks and • Differing dot sizes

  4. Greyscale • By Black and White we really mean a Monochromatic Greyscale Image • Or a Duotone • Or a Tritone • Or a Line Drawing

  5. Creating Greyscale 1 • Scan in Monochrome • “Image->Mode->Greyscale” • “Image->Adjust->Desaturate” • Copy a Channel to a New Greyscale Image

  6. Creating Greyscale 2 • Create a new Layer and Flood fill with Filter Colour of your choice • Create a Hue/Saturation Adjustment Layer and set Saturation to –100% • Manipulate Opacity to obtain desired effect • Flatten Layers • Change Mode to Greyscale

  7. Adjusting Greyscale: Before • Almost all accurate adjustment is done to Greyscale images with the Levels tools

  8. Adjusting Greyscale: After 1 • Trim Dynamic Range and Contrast

  9. Adjusting Greyscale: After 2 • Trim Printer Dynamic Range (Output levels)

  10. Adjusting Greyscale: After 3 • Curves can be used for greater precision or special effects

  11. Tones 1 • Toned prints can be made from Greyscale images converted back to Colour • Then Overlay a Colour Layer and Blend

  12. Tones 2 • Alternatively, convert Greyscale to Duotone and select ink colour and transfer function • Use dark/dense inks

  13. Duotones 1 • Duotones (and others) do not create extra channels

  14. Duotones 2 • Colours are mixed according to the precise transfer functions created • Double click to edit function or colour

  15. Line Art and Liths 1 • Good Line Art requires very high resolution scans • Line Art should ideally only be Black and White – no Greys • Convert to Bitmap– very poor

  16. Line Art and Liths 2 • Add a Threshold Adjustment Layer for much greater Control

  17. Line Art and Liths 3 • For more effects play with Blend Modes and Opacity of Adjustment Layer

  18. End of Black and White Photographs courtesy of Janet Edwards

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