In popular culture German scratch and sniff card from the film PolyesterĪpart from the stickers, scratch and sniff surfaces are to be found on some objects in popular culture: While there were hundreds of companies that put out Scratch and Sniff stickers, the most well known are the originators Creative Teaching Press (CTP) (who later renamed them Sniffy's in 1980/1981), Trend Enterprise's Stinky Stickers line (which followed directly after CTP), Hallmark, Sandylion, Spindex, Gordy, and Mello Smello. Because of the micro-encapsulation, the aroma can be preserved for extremely long periods of time. The rub to release action breaks the micro-encapsulated bubbles and releases the aroma. The desired smell is surrounded by micro-capsules that break easily when gently rubbed. Scratch and sniff is created through the process of micro-encapsulation. In 1987, cards distributed by the Baltimore Gas and Electric Company led to a rash of false alarms when the scents of cards in unopened envelopes were mistaken for real gas leaks. Some utility companies enclosed scratch and sniff cards in their bills to educate the public in recognizing the smell of a methane gas leak. Scratch-and-sniff stickers are sometimes used to help diagnose anosmia although this is very uncommon due to the adoption of the Alcohol Sniff Test which uses vaporised 70% isopropyl alcohol. However just a few years earlier in 1974, researchers for Ohio State University could not find a substantial link between olfactory stimuli and improved learning, and suggested that audio-visual learning methods alone were more reliable methods of encouraging learners. In 1977, Creative Teaching Press produced some of the earliest scratch and sniff stickers and were mainly marketed to teachers as rewards for their students. Stickers and labels became popular in the late 1970s, and remained so through to the mid-1980s. One of the earliest use of Scratch-and-sniff technology can be found in the 1971 children's book "Little Bunny Follows His Nose" which featured various smell-able objects such as peaches, roses, and pine needles. 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. 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. He was attempting to create a new method for making carbonless copy paper using microencapsulation. Matson accidentally invented the technology while working for 3M in the 1960s. The technology has been used on a variety of surfaces from stickers to compact discs. When scratched, the coating releases an odor that is normally related to the image displayed under the coating. Scratch and sniff technology generally refers to stickers or paperboard items that have been treated with a fragrant coating. For the 1990 album by Fate, see Scratch 'n' Sniff. For the radio show, see Skratch 'N Sniff.
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