Mr Kipling pack designs were slightly revamped, with more emphasis put on the name of each product; the write-ups on the back of the pack no longer purport to be written by Mr Kipling. Premier Foods also introduced what it termed 'Snap Pack' packaging (now renamed 'Snack Pack'), providing cakes in individually sealed plastic packs to keep them fresh. It quickly became a top-seller for the brand. Mr Kipling French Fancies are small sponge cakes, resembling petits fours, topped with a hemisphere of vegetable-oil "buttercream". The cakes are coated with fondant icing, with several varieties drizzled with a second colour. Standard varieties
Induction cooking 24 kHz. Such high frequencies are not feasible with inexpensive power semiconductors; in 1973 the silicon-controlled rectifiers used were limited to no more than 40 kHz. Even a thin layer of copper on the bottom of a steel cooking vessel will shield the steel from the magnetic field and make it unusable for an induction top. Some additional heat is created by hysteresis losses in the pot due to its ferromagnetic nature, but this creates less than ten percent of the total heat generated. New types of power semiconductors and low-loss coil designs have made an all-metal cooker possible. Panasonic