The Truth About Uv Clothing

How does one test the latest UV blocking fabricsfactor] is based on an entirely different curriculum
emerging on the market?of testing methods than the "SPF" measurements
Curiously, a number of light and laser testingused for creams. For reasons of economy, the
facilities do not currently use the latest pendingnew rating system will use an invitro (lab)
standard involving the averaging of invitro (lab)technique only, and includes wash, stretch and
and invivo (human) field-testing andÂabrasion testing controls - as textiles are generally
instead, choose to measure using thestatic in nature and do not change over time.
single standard Menzies/Az 1994 protocol,However while consistent in protocol, standard
which is much more economical but far lesscontrol testing methods may not yield similar
accurate for the lightweight but complex yarnresults from lab to lab.  While it is
fabrications such as those employed in somecurrently the most cost effectiveÂ
highly regarded apparel products). Based on themethod to determine UPF, the test method will
laboratory credentials, some manufacturers havenot recognize a textile with an averaged number
chosen to use an independent photonics lab that isless than UPF 15: for example, even if the fabric
well respected internationally in their field and ismight test average a "19", this number is always
known to be very comprehensive in their testrounded down by 5 digits, in this case - rendering
results. The facility created disciplineda "14" . Because of the minimum UPF level of 15,
parameters for UV testing based more on thementioned above, this result will render say a "19"
future interests of the industry. However,to become a "0". Therefore, this example would
this method is also a much more expensiveview the swatch or article as under the minimum
testing process.value for a UPF rating, and not yield a rating at
The method employed by textile manufacturersall even though averaging a 19 in the initial
seeking UV ratings for "woven yarns" is perhapstests. The same could be said for a tested level
the one that is more incorrectly but commonlyof "20", which by the prescribed margin of error
used today - and the test protocol is measuredwould result in a UPF of 15. The maximum rating
for stretch type fabrics used mainly for swim anddesignate for a textile is UPF50+; however, 30 is
active-wear. As leno fabric is a woven,more than adequate for the majority of individuals
with various degrees of porosity, suchwith sun-sensitive conditions.
tests can still produce erraticWhat are the differences in fabric types available?
results, especially with ventilated weavesToday, people interested in sun-care products
and if the dyeing process involves opticalhave different demands. Like the protective
brighteners and/or titanium dioxides in theblocks and lotions, there are many types of
pigments. These variables can wreak havoc ontextiles used in apparel that are available to meet
accurate results.Âvarious degrees of desired performance based on
Âlifestyle. Tighter (opaque) weaves and darker
What can create controversy with the newcolours are usually designed to be worn close to
fabrics?the skin, and can assist in blocking a higher
As with any consumer goods purchase involvingproportion of ultraviolet light for longer periods.
new and evolving technologies, one must beWhether stretch or woven, these fabrics are
careful in relying on poorly researched magazineused in clothing that is opaque and is worn alone
or newspaper articles, which can be quiteas a fashion lifestyle or as swimwear. A drawback
misleading. Be sure to read the product detailto the tighter weaves and stretch fabrics is
descriptions on clothing tags or, if purchasingreduced ventilation and increased heat retention -
on-line, the description of a product on the webwhich can be a serious liability to certain individuals
site. If a product does not say, for example, thatin hot climates.
it offers up to a 97% block, one should notÂ
assume that it does, even if other items withinOther fabrics employ a complex lightweight
that product line so say so on the tag or in theweave and design structure that is somewhat
on-line product description.looser to encourage cooling airflow, and will
Do colors affect the UV protection level?provide additional coverage. These garments are
Yes, color is also an important point whendesigned to be worn over other favourite
considering clothing for the purpose of sun-block:summer-weight weather apparel. This type of
Darker colors (especially indigo, navy and black)clothing is a sun-care "booster" but might not be
perform better because they can absorb morean appropriate recommendation for persons
UV; however the trade-off is that they canrequiring a high degree of opaque protection or
create heat as a by-product. Lighter colors willhave prescriptive conditions that renders one
reflect more, especially fabrics with opticalparticularly light sensitive - a drawback to the
brighteners. All everyday existing fabrics can belooser weaves and (lighter colours) will be the
considered to have a sun-protective value, butallowance of more UV transmission than the
unlike the creams that can have lower values, theopaque fabrics for areas of bare skin under a
current UPF rating system begins at the minimumsingle layer of fabric, especially if the area is pulled
UPF level of 15 to permit an independenttightly over the skin and exposed to prolonged
classification.time in the sun. This drawback is remedied in the
When the ASTM D13.65 committee was createdcareful construct and loose design of such apparel,
for the addendum to sun-protective fabrics inas the UV light transmittance decreases
1996, a number of textile manufacturers and lightexponentially and dramatically, every millimetre
and laser specialists invested about 5 years inaway from the skin.
planning the testing protocol. Even today, it is still aSome manufacturers' hats and accessories,
work in progress and will be updated annuallythrough their fabrication, have a much higher level
because the results are still inconclusive and meritof protection, and certain styles with multiple
more study. Naturally, some of the unique textileslayering and fusing agents will afford a UPF rating
being created today are, under current labup to 40+. While the clothing is a protective &
conditions, misunderstood.effective adjunct as long as it is worn as
What exactly is done in-lab to obtain a UPF rating?designed, with the appropriate size
Is it different from "SPF"?chosen by the individual for the particular activity
Yes, UPF involves a different criterion. While still aand worn loosely over other summer-weight
work in progress, the UPF [ultraviolet protectionapparel.