Colour coding
Question: Why is house dust always grey?
Answer: Here in the dry, dusty Middle East, our house dust is closer in
colour to the pale sand outside.
Chana Lajcher
Jerusalem College of Technology,
Israel
Answer: Our dust is red, as we live in north Texas, close to the Red River.
Our land is composed mainly of red clay.
S. Tinney
Texas
Answer: Under normal conditions, house dust consists mostly of sloughed-off
skin cells. Amazingly, most of the dust on top of the wardrobe is dried-out
human skin.
Dry skin is a translucent grey colour, and consequently, so is…
