The high and low temperature series of test chambers are divided into high and low temperature test chambers, high and low temperature alternating test chambers, high and low temperature damp heat test chambers, high and low temperature alternating humidity heat test chambers, etc. The structure and principles of these test chamber boxes are the same. Section tells you the working principle of the heating system of the high and low temperature test chamber.
The heating system of high and low temperature test chamber is composed of air electric heating wire, heating control system and air circulation. The heating method generally uses nickel-chromium alloy electric heating wire for direct heating. When the high and low temperature test box is working, the circulation fan causes convection of the air in the box, takes away the heat generated by the heating wire, and enters the working room to achieve the heating of the air in the box Effect; its control system is adjusted by microcomputer to control the conduction time of the heating wire, heating heat and heat loss to achieve a dynamic balance, to achieve the purpose of precise temperature control.
Modern shave brushes are similar in appearance, composition and function to their centuries-old predecessors. Although a variety of different materials are still used to fashion shave brush handles, synthetic handles of nylon, urethane or plastic are the most common even with the most expensive shave brush manufacturers. Benefits of synthetic handles include a lesser chance of breakage and resistance to damage by moisture.
A shave brush's price is usually determined more by its bristle load than any other factor, except for brushes with very exotic handles. The most expensive brushes often use exotic materials in the handle. The bristles are fixed together into a knot that is installed into the handle. The best quality brushes are hand knotted. Badger and boar brushes are the most commonly found animals used for Shaving Brush fibers. Badger species include the Eurasian and the hog badger.
Badger brushes are often referred to as two band, or three band. Perhaps all badger hair fibers have three bands, but those used in the brushes conceal the lighter bottom band. Nonetheless, both types of bristle make desirable shaving brushes. Lower-quality brushes are often machine made and the bristles may be trimmed, resulting in sharp, prickly tips.
Best badger are brushes made with the finer and more pliable hairs from 20 - 25% of the badger's body. It is longer in length and lighter in color than 'pure' badger hair. A 'best' badger brush is more densely filled with hair than the 'pure' badger brush and will produce a correspondingly greater lather. However, some wet shavers argue that the variance between the quality of a 'pure' and a 'best' badger brush is negligible. Best badger and better quality brush hairs are often fit so that the ends do not have to be cut to shape.
Synthetic shave brushes, most often made using nylon bristles, are available in a range of prices and gradations in quality. Comparable to traditional shaving brushes, synthetic fiber brushes can quickly create a rich lather using relatively little shaving soap or cream. The synthetic fibers dry faster than natural hair and are less sensitive to everyday use.
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