Source: Reader’s Digest, April 1949. With users as pure as this mother/daughter combo, wouldn’t you trust the marketing claims of Amm-i-dent? Adding ammonium to tooth-cleaning agents was a marketing craze at the time the above ad appeared. An article in the July 30, 1949, edition of Billboard magazine noted that the potential advertising revenue derived … Continue reading Vintage Toronto Ads: Ammoniate Your Smile!