The sunblock print ad that shines bright under the sun

A recent magazine insert for Sundown Solar Protection has a little trick up its sleeves: when you expose the insert to light, the man who does not use Sundown gets sunburn and the woman, apparently using Sundown,  gets a nice tan.

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Advertising Agency: DDB, Brazil
Creative Directors: Rodrigo Almeida, Renata Florio, Júlio Andery, Rodolfo Sampaio, Sérgio Valente
Copywriter: Geraldo Gonçalves
Art Director: Markus Correa
Photographers: Rodrigo Ribeiro, Sérgio Prado
Account Supervisor: Gabriela Guzzardi, Michelle Martins e Ricardo Zanella
Account Director: André Silveira

Source: http://www.ibelieveinadv.com/2009/05/sundown-solar-protection-sob-o-sol/