Knife Sherperner
Knife sharpening is the process
of making a knife or similar tool sharp by grinding against a hard, rough
surface, typically a stone, or a soft surface with hard particles, such as
sandpaper. Additionally, a leather razor strop, or strop, is often used to
straighten and polish an edge.
The smaller the angle between
the blade and stone, the sharper the knife will be, but the less side force is
needed to bend the edge over or chip it off. The angle between the blade and
the stone is the edge angle – the angle from the vertical to one of the knife
edges, and equals the angle at which the blade is held. The total angle from
one side to the other is called the included angle – on a symmetric
double-ground edge (a wedge shape), the angle from one edge to the other is
thus twice the edge angle. Typical edge angles are about 20° (making the
included angle 40° on a double-ground edge). The edge angle for very sharp
knives can be as little as 10 degrees (for a 20° included angle). Knives that
require a tough edge (such as those that chop) may sharpen at 25° or more.
Different knives are
sharpened differently according to grind (edge geometry) and application. For
example, surgical scalpels are extremely sharp but fragile, and are generally
disposed of, rather than sharpened, after use. Straight razors used for shaving
must cut with minimal pressure, and thus must be very sharp with a small angle
and often a hollow grind. Typically these are stropped daily or more often.
Kitchen knives are less sharp, and generally cut by slicing rather than just pressing,
and are steeled daily. At the other extreme, an axe for chopping wood will be
less sharp still, and is primarily used to split wood by chopping, not by
slicing, and may be reground but will not be sharpened daily. In general, but
not always, the harder the material to be cut, the higher (duller) the angle of
the edge.
Sink, Dish Washer
A sink also known by other names including sinker, washbowl, hand
basin and wash basin is a bowl-shaped plumbing fixture used for washing hands,
dishwashing, and other purposes. Sinks have taps (faucets) that supply hot and
cold water and may include a spray feature to be used for faster rinsing. They
also include a drain to remove used water; this drain may itself include a
strainer and/or shut-off device and an overflow-prevention device. Sinks may
also have an integrated soap dispenser. Many sinks, especially in kitchens, are
installed adjacent to or inside a counter.
History
The washstand was a bathroom sink made in the United States in the
late 18th century. The washstands were small tables on which were placed a
pitcher and a deep bowl, following the English tradition. Sometimes the table
had a hole where the large bowl rested, which led to the making of dry sinks.
From about 1820 to 1900 the dry sink evolved by the addition of a wooden
cabinet with a trough built on the top, lined with zinc or lead. This is where
the bowls or buckets for water were kept. Splashboards were sometimes added to
the back wall, as well as shelves and drawers, the more elaborate designs
usually placed in the kitchen.
How to Clean Up ?
Tips on caring for the dishwasher:
1.
Check the shelves part
of the shelf rack in case there is dirt attached, if pepper clean with sponge
then rinse.
2.
Avoid washing equipment
or objects containing oil, acids, rust, paint.
3.
Do not open the
dishwasher when the machine is working.
4.
For sharp and long
equipment such as a knife, preferably horizontally, and a sharp side facing up
or down, it is useful for the tool to be thoroughly cleaned into each part.
Can Opener
A can opener (in North American English and Australian
English) or tin opener (in British and Commonwealth English) is a device used
to open tin cans (metal cans). Although preservation of food using tin cans had
been practiced since at least 1772 in the Netherlands, the first can openers
were not patented until 1855 in England and 1858 in the United States. These
early openers were basically variations of a knife, though the 1855 design
continues to be produced. The first can opener consisting of the now familiar
sharp rotating cutting wheel was invented in 1870 but was considered too
difficult to operate for the ordinary consumer. A breakthrough design came in
1925 when a second, serrated wheel was added to hold the cutting wheel on the
ring of the can. This easy to use design has become one of the most popular can
opener models.
Around the time of World War
II, several can openers were developed for military use, such as the American
P-38 and P-51. These featured a robust and simple design where a folding
cutting blade and absence of a handle significantly reduced the opener size.
Electric can openers were introduced in the late 1950s and met with success.
The development of new can opener types continues with the recent addition of a
side-cutting model.
How to Cleap Up ?
Just dish wash like we normal do it and dry if you
done to washing.
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