Pineapple ripened or off-green. A plant growth regulator, Ethephon, is typically sprayed onto the fruit one week before harvest, developing ethylene, which turns the fruit golden yellow. After cleaning and slicing, a pineapple is typically canned in sugar syrup with added preservative. A pineapple never becomes any riper than it was when harvested. The fruit itself is quite perishable and if it is stored at room temperature, it should be used within two days; however, if it is refrigerated, the time span extends to 5–7 days. Mimi Sheller writes: "The pineapple entered European iconography as a symbol of welcome and hospitality,
International Symbol of Access Koefoed’s symbol depicts an empty wheelchair. This icon was widely promoted around Sweden the following year. Karl Montan, director of Sweden’s new Handicapped Institute, also promoted Koefoed’s design to Rehabilitation International. Head of RI’s International Commission of Technology and Accessibility (ICTA), Montan was asked by RI to form a special committee that would find and deliver a symbol to the group’s 1969 convention in Dublin. Montan’s group was asked to choose from six symbols. When Koefoed’s symbol was presented, several members complained that it was too austere and illegible. As Montan noted: "a slight inconvenience with the symbol is the