Ariel "20°C Mailing"

Ariel Coldactive cleans your laundry at just 20 °C. A benefit that had to be communicated in a surprisingly convincing way. At the same time the mailing should help sell more Ariel Coldactive. They sent a mysterious mailing containing a black piece of cloth, an unbranded bag of Ariel Coldactive washing powder, along with a message to wash the cloth at 20 °C. The trick: after washing the cloth, it turns pure white, literally revealing the benefit of Ariel Coldactive: It's that easy to get your clothes pure and clean at only 20 °C. The mailing itself could be used as a voucher for a discount on Ariel Coldactive. More than 15% of them were actually returned for the discount. Many clients called Ariel to express how much they liked the mailing.

Agency: Saatchi & Saatchi, Germany.