You won’t believe what they do to this model’s face to sell Dorothy Grey’s cold cream!
They put RADIOACTIVE dirt on her face to prove how well the cleanser works – they actually show the Geiger counter!
Fortunately, modern cosmetic chemists don’t use such potentially dangerous test methods. Today we can quantify residual oil and dirt through a variety of techniques like Gas/liquid chromatography or Atomic Absorption which don’t involve exposing the test subjects to radiation.