Shaving Foam Prints

Create beautiful prints on paper using shaving foam and food colouring!

You will need

  • Plate or disposable tray
  • Shaving foam
  • Food colouring
  • Fork
  • Paper

Method

  1. Cover a plate or tray with shaving foam.
  2. Add a few drops of food colouring to it.
  3. Using the prongs of a fork, swirl the food colouring around making patterns.
  4. Apply some plane paper to the shaving foam and food colouring and rub back and forth with a small amount of pressure with your hands a few times.
  5. Peel the paper back and lay it down shaving foam up.
  6. Carefully remove the shaving foam from the paper with some kitchen towel making sure you don’t tear the paper.
  7. How does your print look?

Investigation

  • Try adding more than one colour to the shaving foam and create patterns with your fork. Take care not to over mix as you want to be able to see all the colours in beautiful patterns.

Science

Shaving foam is a surfactant which means it is made up of water loving parts (hydrophilic) and water hating parts (hydrophobic). The liquid food colouring is water loving (hydrophilic) so when its dropped onto the shaving foam it won’t soak in fully because it can only interact with the hydrophilic parts of the shaving foam. It is repelled by the hydrophobic parts. Therefore, the colour sits on top. When you place the paper onto the shaving foam, the food dye soaks easily into the paper transferring the whole pattern across. This is because the paper is made from wood pulp which is a hydrophilic molecule.

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