Fourcault process the pit must be "heated back" and then the process can continue anew. Glass chemistry has a huge impact on the process since it controls the melting, forming and annealing temperatures, liquidus temperature (point where various chemicals that make up the glass start to crystallize out of the glass) and rates of change of characteristics of the glass itself. Occasionally the ribbon will break or crack, leading to failure of the drawing process. Such breaks, known as "checks" can be alleviated by using proper operating parameters. Sometimes an expedient measure, using a portable source of heat, can be used to
Metal hose areas of application: Metal hoses resist high pressures and offer maximum tightness on account of the material from which they are manufactured. Their flexibility lends them tensile and tear strength. Also, they are characterised by their corrosion and pressure resistance, even under extreme conditions such as when exposed to aggressive seawater, strong vibrations and extreme temperatures such as in space or when transporting cooled liquid gas. To increase pressure resistance, metal hoses can be equipped with one- or two-layer braiding. The braiding is firmly connected to the hose fittings on both sides to absorb the longitudinal forces caused by internal