The Scottish style of ales break down into Light, Heavy and Export. In the 19th century Scotland, a nomenclature, based on the now obsolete shilling currency, was devised in order to distinguish each. 60/- (light), 70/- (heavy), 80/- (export), 90/- to 160/- for Scotch Ales.
Scottish Ales traditionally go through a long boil in the kettle for a caramelization of the wort. This produces a deep copper to brown in colored brew and a higher level of unfermentable sugars which create a rich mouthfeel and malty flavors and aromas. Overall hop character is low, light floral or herbal, allowing its signature malt profile to be the highlight. Smoky characters are also common.
Average alcohol by volume (abv) range: % --BeerAdvocate