This section explains some methods of preparing screen

                                                    Learning outcomes

By the end of the lesson, learners will be able to:

  • Understand the Photographic method of screen preparation.
  •    Design the “image/design” to be used for developing a photographic screens.
  •    Prepare or “coat” a photographic (photo-chemical) screen.

What is Photographic (photo-chemical) screen method

  • This type of screen printing method derives its name from photo which means light.
  • It is a printmaking which is done, using a screen coated with a chemical solution(photo emulsion mixed with potassium dichromate).
  • The coating solution makes it possible for the effect of light to produce an image on screen.
  • A coated screen is said to be sensitized.
  • Coating renders the screen sensitive to light penetration.
  • The design on the screen is reproduced or printed on a selected surface (substrate), by forcing ink through the screen which bears the image, with a squeegee.

Designing “image/design” used for developing photographic screens.

The inking process

  •   Set out the final image to the required size with pencil on a bond paper.
  •   Do colour separation if the colours are two or more.
  •   Trace the image if it’s one colour or images colour by colour if the image is two or more colours onto kodatrace/tracing paper with black opaque rotring/indian ink using rapidographic pen and sable brush a and allow it to dry thoroughly. This process is termed as inking.

The Computer process

  • Sketch your image/design.
  • Use your computer make the image/design.
  • Do colour separation if the colours are two or more.
  • Print out image/design.
  • Apply cooking oil/kerosene and use when dried.

Preparing or coating a photographic(photo-chemical) screen.

  • Mix 2 or 3 table spoonfuls of photo-emulsion(gelatin, seroset, alcoset, or fixoprint) with 1 table spoonful of potassium dichromate (sensitizer) into an insoluble, photosensitive(sensitive to light) substance.
  • Add a little quantity of distilled water and stir gently  and evenly, until the chemical solution is thoroughly mixed.
  • Hold the screen erect or standing in a bowl or on a insubstantial.
  • Repeat the coating two more times allowing some intervals between.
  • Allow coated screen to dry thoroughly and it is ready for exposure.
  • Use some of the coating solution/lacquer/acylic paint to seal or cover pinholes after exposure.


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