hands washing fabric in plastic bowl

Detergents are supposed to remove stains, and you can find out how well by carrying out washing tests. But each stain can only be washed once, right? So how can I make comparisons between detergents and find out which conditions are best for removing the stains? The answer is, before I wash, I first need to make multiple pieces of fabric dirty. The experts call this "staining". In this experiment, we want to show you the principle of how the professionals do it, so we won't use real detergent. Instead, you can use a little dishwashing detergent.

You will need

  • Equal-sized pieces of cotton fabric (for example, from old white undershirts)
  • Something to make a stain – for example, beet juice, cocoa and lipstick
  • Cold and warm water
  • Container for washing
  • Dishwashing detergent 
  • Stopwatch
  • Spoon for stirring

Let’s get started!

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