“Dorothy Gray Cold Cream”

[baron-waste.livejournal.com]

The kneejerk reaction to this is predictable. Remember, math is hard, which makes quantitative reasoning difficult also. So, don't bother!

Today, this promo idea could be done just as effectively - more so, really - with fluorescent powder and a black light. But this works, too… in its own way.

[Presumably. Careful observation will show that we don't actually see, or hear, what she's talking about. But you can send for a nifty booklet which describes it!]