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When this occurs, the internal molecules of the leather increase in speed and begin colliding with one another at a rate so fast that the bonds of the leather molecules are no longer capable of remaining intact and thus break. The effect of heat is most often associated with long-term exposure and rapid fluctuations in temperature on the leather.
So that practical clothing may be described conveniently by a range of small integers, the unit of thermal resistance, to be called the “tog”, is the resistance that will maintain a temperature difference of 0.1°C. with a flux of 1 watt per square metre, or in more practical terms, 10°C. with a flux of 1 watt per square decimetre.
The supporting fabric can be removed by rolling it out from under the textile item as it is laid out on the glass, bit by bit. This can stress the fibres: this method cannot be used on any old textile that is likely to be damaged by the handling. Such fabrics are allowed to dry first, then lay them on the glass and wet them in place.
The Power-Heat-Set process, formerly known as Suessen process, was developed in the beginning of the 1970s and was the first continuous heat setting system worldwide. The process itself was revolutionary in that it was the first system not operated with saturated steam and pressure, but with a superheated steam/airmix at atmospheric pressure.
Clothing insulation is correlated with outdoor air temperature, indoor operative temperatures, relative humidity and also by the presence of a dress code in the environment in question. Recent studies have developed dynamic predictive clothing insulation models that allow more precise thermal comfort calculation, energy simulation, HVAC sizing ...
In the second quarter of 1924 Daimler began building Weymann flexible framed fabric bodies for their "natural silence, the entire absence of drumming and all those attributes which make for comfortable long-distance touring with a minimum of fatigue". Seats were Dryad basket-chairs of wicker button-quilted in Bedford cord.
wetting back- semi-processed leather is rehydrated. sammying - 45-55%(m/m) water is squeezed out the leather. splitting - the leather is split into one or more horizontal layers. shaving - the leather is thinned using a machine which cuts leather fibres off. neutralisation - the pH of the leather is adjusted to a value between 4.5 and 6.5.
Ambient temperature and humidity also influence the rate of fluid transfer by wicking. [ 3 ] The migration of moisture through multiple layers of clothing or through plated fabric is more complicated and is affected by the order of layers with different wicking and absorptive characteristics.
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