Chocolate whether emulsifying agents are added. Different manufacturers develop their own "signature" blends based on the above formulas, but varying proportions of the different constituents are used. The finest, plain dark chocolate couvertures contain at least 70% cocoa (both solids and butter), whereas milk chocolate usually contains up to 50%. High-quality white chocolate couvertures contain only about 35% cocoa butter. Producers of high-quality, small-batch chocolate argue that mass production produces bad-quality chocolate. Some mass-produced chocolate contains much less cocoa (as low as 7% in many cases), and fats other than cocoa butter. Vegetable oils and artificial vanilla flavor are often used
Types of chocolate and sugar alcohols (sorbitol, maltitol, etc.) are not permitted. Products manufactured or imported into Canada that contain non-permitted ingredients (vegetable fats or oils, artificial sweeteners) cannot legally be called "chocolate" when sold in Canada. A non-standardized name such as "candy" must be used. Products labelled as "Family Milk Chocolate" elsewhere in the European Union are permitted to be labelled as simply "Milk Chocolate" in Malta, the U.K. and the Republic of Ireland. In Japan, 'chocolate products' are classified on a complex scale (q.v. ). Products using milk chocolate or quasi milk chocolate as described above are handled in the same