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World 3 · Ink Chromatography · 10 min · PRO

Splitting a colour: how paper chromatography works

Water climbs the paper and carries each dye at its own speed

PRO · Forensic Science

World 3: Ink Chromatography is part of PRO

The first world of Forensic Science is free. PRO opens the other 22 lessons in 6 worlds — simulations, quizzes and all.

  • Rf values: putting a number on a colour
  • Which pen wrote the note? Comparing inks
  • Reading a footprint: what the shoe says
  • From foot to height: estimating a person
  • Stride and speed: walking or running?
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