energy in order to raise, transport, or compress fluids. The earliest pumps were
devices for raising water, such as the Persian and Roman waterwheels and the more
sophisticated Archimedes screw (q.v.).
The mining operations of the Middle Ages led to development of the suction
(piston) pump, many types of which are described by Georgius Agricola in De re
metallica (1556). A suction pump works by atmospheric pressure; when the piston is
raised, creating a partial vacuum, atmospheric pressure outside forces water into the
cylinder, whence it is permitted to escape by an outlet valve. Atmospheric pressure
alone can force water to a maximum height of about 34 feet (10 metres), so the force
pump was developed to drain deeper mines. In the force pump the downward stroke of
the piston forces water out through a side valve to a height that depends simply on
the force applied to the piston.
We mainly use the pump for cosmetic application. for example, we have
Custom Foam Pump,
Cosmetic
Treatment Pumps, Crimp
Pump and Makeup and Nail Remover Pump. Except for the pumps, we also have
different cosmetic products like
bottles and sprayer.
Cosmetic bottles are perfect for skin care and beauty products. They can contain
gels, creams, lotions and deep skin cleansing products. Most jar containers come with
a shive (a flat plastic shelf that fits inside the jar) used to keep the contents
free from foreign debris (dust & germs). Moreover, jars are designed with airtight
lids, which keep the contents fresh and ready for future use. The most commomly used
are
Cosmetic Airless Bottle,
Cosmetic
Lotion Bottles, Multi-purpose Plastic Bottle and Foam Bottle.
As for the sprayer, there are also many kinds like
Plastic
Hand Trigger Sprayer, Plastic Fine Mist Sprayer, Perfume Mini Sprayer and
Perfume Credit Card Sprayer. cosmetic industry developed prediction models for the
best estimate of inhalation exposure combining data from computer simulation programs
available in the market, individual real measured data and last but not least the
experience from the market. Such attempt is driven by the toxicological profile of
individual used ingredients. The focus of this review is on the determination of
inhalation exposure, and the derivation of safe exposure levels for cosmetic spray
products. Many of the methods employed to ensure product safety of cosmetic sprays in
accordance with the general requirements of the EC Cosmetics Directive are based on
industry experience which are not necessarily consistent across companies.
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