"KITCHEN EQUIPMENT & UTENSIL epsd September 4th 2017
Kitchen timer
Kitchen Timer a device
that can be set for a number of minutes (usually up to an hour) that sounds
alarms such as buzzer or bell when a certain amount of time has passed;
commonly used when cooking or baking.
The history of measuring time in relatively short
intervals dates back to the Chinese culture, which used water clocks to
measure short distances of time. This method involved making a hole in a bowl
and placing the bowl in water, and when the bowl sank down into the water, the
time measurement was finished: the time was up. The shorter the interval
needed, the smaller the bowl they used. The Chinese began using water clocks
between 200 and 1300 BC. Water clocks were
the result of the need for an instrument to measure time during the evening
hours and on rainy and cloudy days. The sundial worked well
when the sun was out, but other instruments were necessary at other times.
People realized that water clocks were not always accurate, though, and this
spawned the invention of mechanized clocks and timers.
When mechanical clocks were invented, the same clockwork
mechanisms were also used to produce mechanical, automatic timers. During
the 1950's and the 1960's, kitchen timers were very popular.
The average American had
become more mobile with the affordability of automobiles. It was also a time
when the “housewife” was starting to move forward in
society and no longer had time to stand over the oven and toil
over recipes like they once did. Kitchen timers were
very helpful through these changing times, and made better use of time by
allowing the household cook the ability to do more than just one thing at once.
Since timers were such a staple in the kitchen, they could
usually be found on most counter tops back in that time. For this reason, they
became somewhat of a novelty and were manufactured in different colors, shapes
and sizes. Some people even began to collect timers as a hobby.
Source : http://kamus-internasional.
Ziploc
bag
Ziploc is a brand of reusable, re-sealable zipper plastic bags
those kinds of plastic bags that have zippers on one side for easy opening and
closing pockets. These are generally used for storing edible items, such
as bags helping to preserve nutrients as well as preventing environmental
exposure that can end up lowering food products. They can also be used for
other types of products such as tools, stationary items and gardening tools.
“It seems hard to
believe it now, but people did not know how to open the bag,” Steven Ausnit,
developer of the original Ziploc, recently told an audience at Marquette
University. He recalled that sometime around the early 1960s, his company
persuaded Columbia Records to try a plastic sleeve with the zipper on top for
albums. “At the final meeting, we were all set to go. The guy called in his
assistant, handed her the sealed bag and said, ‘Open it.’ I thought to myself,
Lady, please do the right thing! The more she looked at it, the more my heart
sank. And then she tore the zipper right off the bag.”
Ausnit, who fled
Communist Romania with his family in 1947, had been experimenting with plastic
zippers since 1951. That was when he, his father (Max) and his uncle (Edgar)
purchased the rights to the original plastic zipper, designed by a Danish
inventor named Borge Madsen, who had no particular application in mind. They
formed a company called Flexigrip to manufacture the zipper, which used a
plastic slider to seal two interlocking grooves together. When the slider
proved costly to manufacture, Ausnit, a mechanical engineer, created what we
now know as the press-and-seal type zipper.
In 1962, Ausnit learned
of a Japanese company called Seisan Nihon Sha, which had figured out a way to
incorporate the zipper into the bag itself, which would cut production costs by
half. (Flexigrip was attaching its zippers to bags with a heat press.) After
licensing the rights, the Ausnits formed a second company called Minigrip;
their big break came when Dow Chemical asked for an exclusive grocery-store
license, ultimately introducing the Ziploc
bag to a test market in 1968. It wasn’t an immediate success, but by 1973, it
was both indispensable and adored. “No end of uses for those great Ziploc
bags,” Vogue told readers that November. “From holding games to keep the young
occupied on the long drive to the mountains, to safe storage places for
cosmetics, first-aid supplies and food. Even your wig will be happier in a
Ziploc.”
Source : https://mobile.nytimes.com/
Plastic Wrap
Plastic
wrap is a simple invention that is very useful to wrap and protect food to keep
it clean. But in addition to its main task as a wrapper, plastic wrap also has
many other unexpected functions.
Saran resins and films
are similiar to plastic wrap and Saran resins and films, often called
polyvinylidene chloride or PVDC, have been used to wrap products for more than
50 years.
Saran works by
polymerizing vinylide chloride with monomers such as acrylic esters and
unsaturated carboxyl groups to form long chains of vinylide chloride. The
copolymerization results in a film with molecules bound so tightly together
that very little gas or water can get through.
Source : http://www.tipsiana.com/
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