Aluminium foil foil rolling mills to the desired thickness, or by continuously casting and cold rolling. To maintain a constant thickness in aluminium foil production, beta radiation is passed through the foil to a sensor on the other side. If the intensity becomes too high, then the rollers adjust, increasing the thickness. If the intensities become too low and the foil has become too thick, the rollers apply more pressure, causing the foil to be made thinner. The continuous casting method is much less energy intensive and has become the preferred process. For thicknesses below , two layers are usually put together
Tin toy Tin toy A tin toy, or tin lithograph toy, is a mechanical toy made out of tinplate and colorfully painted by chromolithography to resemble primarily a character or vehicle. Tinplate was used in the manufacture of toys beginning in the mid-19th century. The invention of sheet metal stamping machines in 1815 allowed for the mass production of inexpensive toys. Tin toys were made from thin sheets of steel plated with tin, hence the name tinplate. Tin toys were a cheap and durable substitute for wooden toys. The toys were originally assembled and painted by hand. Spring activated tin toys originated