Cake (firework) been blown off by the discharging stars). In a traditional cake, all the candles point upwards; a variant is called the "fan" or "angle" cake. Cakes are one of the most popular types of firework, as they can create spectacular and long-lasting effects from a single ignition while minimising safety concern. In the UK, the reclassification of aerial shells to Category 4 has popularised cakes as a method for achieving similar effects while staying within safety guidelines, particularly by firing multiple candles at the same time. Cakes vary greatly in size, weight and duration. Some last only a few seconds
Types of plant oils oil (usually the seed), using one of two types of oil press. The most common is the "screw press", which consists of a large-diameter metal screw inside a metal housing. Oil seeds are fed into the housing, where the screws mash the seeds, and create pressure which forces the oil out through small holes in the side of the press. The remaining solids, called "seed cake", are either discarded or used for other purposes. Oil presses can be either manual or powered. The second type of oil press is the "ram press", where a piston is driven into a cylinder,