sniff

Scratch and sniff technology is the application of a fragrant coating to items such as stickers or paperboard, so that when the coating is scratched it releases an odor that is normally related to the image displayed under the coating. The technology has been used on a variety of surfaces from stickers to compact discs. Gale W. Matson accidentally invented the technology while working for 3M in the 1960s. He was attempting to create a new method for making carbonless copy paper using microencapsulation. The technology to infuse microcapsules and paper was submitted to the US patent office on November 18, 1969, and the patent was granted on June 23, 1970. Despite the technology being invented by Matson in the 60's and its subsequent success in the 70's, the first patent for a translucent fragrance releasing version of microcapsules wasn't issued until January 15, 1985, to the 3M corporation.

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