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    ALKALINE DRY-CELL PATENT
    November 15, 1960 - U.S.A.

    A U.S. patent was issued for an alkaline dry-cell to P.A. Marsal, Karl Kordesch and Lewis F. Urry who assigned it to the Union Carbide Corporation, the manufacturer of Eveready batteries (No. 2,960,558). Compared to the existing carbon-zinc dry-cells, it offered an appreciable increase in life-span and efficiency during heavy continuous drains. Its construction used an alkaline electrolyte, manganese dioxide as depolarizer, a zinc powder-gel anode, and certain additives such including mercury and electrolyte-creep inhibitors. The patent gave practical details for commercial production. The patent claimed that whereas four cells in series of the carbon-zinc type gave 4.5 volts to power a 1.25-amp bulb for 45-min to 1-hr, the new alkaline design gave good brilliance after 6 to 7 hours.

    DRY-CELL PATENT
    November 15, 1887 - U.S.A.

    German scientist, Dr. Carl Gassner, was issued a U.S. patent (No. 373,064), the first in the U.S. for a "dry" cell. Gassner had already patented his invention in Germany (No. 37,758) on 8 Apr 1886, and also in Austria, Belgium, England, France and Hungary in the same year. The sealed zinc shell which contained all the chemicals was also the negative electrode. Later, he improved the shelf life of the battery by adding zinc chloride to the electrolyte to reduce corrosion of the zinc shell. Gassner's battery was much like the carbon-zinc, general-purpose batteries sold today. By 1896, the National Carbide Company (later Union Carbide and Eveready) produced the first consumer dry cell battery. Two years later, the company made the first D cell.

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Straight hair is trendy and stylish :

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Straight hair is trendy and stylish and that is why hair straighteners are so popular with the people all over the world, which helps the user to achieve the same.

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The art of hair straightening is not new but it has been around for a long time. It seems to us that whether we are a curly haired woman longing for sleek, straight locks, or a straight-haired girl wanting to go even straighter, we are never satisfy with the hair we have. Such dissatisfaction has led to so many innovations and inventions. Looking few years back we find that our mothers and grandmothers used to employ to such tricks as ironing their hair straight. In that case, we are lucky enough to have a number of modern means like Electric Curling Irons, Electric Pressing Irons, Thermal Curling Irons, Electric Flat Irons, Electric Straightner Irons, Electric Crimpers, Flat Irons, Thermal Stoves, and more at our disposal to allow us to switch straight and curly as we wish in this twenty-first century.

If you have naturally, straight hair you might be thinking of not investing your money on a hair straightener as it is of no use for your hair as it might be useful for those having curly or frizzy hairs. But that is not the right decision because there is just something about shiny, straight hair that makes most of us long to try it at some point or other and that can be achieve very easily with a hair straightener. It is also wrong to conclude that curly hairstyle is out of market but you should know that while hair with curls can look romantic and sexy, straight hair radiates an air of style and classiness. Both the hair style holds their own importance.

Very few people in the world have hair as truly straight as the styles we see on TV or in magazines and most of us have just wavy hair that prevents the hair from lying completely flat. Therefore, to get pin straight hair that will lie flat we turn to hair straightening techniques that is indeed very effective. If you want to straighten your hair at home, a good pair of hair straightener will be a wise choice that will save your money and time that you would have spent otherwise on your hairdresser. You need to simply heat them up, apply them on your hair, and enjoy the pin straight hair that you wished for long time.

Few hair straighteners on the market are graded best considering the overall functionality and safety. They do not overheat as the other hair straighteners and are safer for your hair.Since heat is considered bad for your hair and just as too much blow-drying leaves your hair dull and brittle the same holds true for too much straightening. But if you use ceramic straightener such GHD then there is nothing to panic. If you are using hair straightener on the daily basis then you should step up the hair care regime a notch at the same time. Invest in a good quality conditioner or follow hot oil treatment a couple of times per week to ensure that your hair is as shiny and healthy as it is straight.

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