Protect your workers with the right equipment


The Truth About Uv Clothing

How does one test the latest UV blockingtesting methods than the "SPF"
fabrics emerging on the market?measurements used for creams. For
Curiously, a number of light and laserreasons of economy, the new rating
testing facilities do not currently usesystem will use an invitro (lab)
the latest pending standard involvingtechnique only, and includes wash,
the averaging of invitro (lab) andstretch and abrasion testing controls -
invivo (human) field-testing andÂas textiles are generally static in
instead, choose to measure using thenature and do not change over time.
single standard Menzies/Az 1994However while consistent in protocol,
protocol, which is much more economicalstandard control testing methods may not
but far less accurate for theyield similar results from lab to lab.Â
lightweight but complex yarn While it is currently the most cost
fabrications such as those employed ineffective method to determine UPF, the
some highly regarded apparel products).test method will not recognize a textile
Based on the laboratory credentials,with an averaged number less than UPF
some manufacturers have chosen to use an15: for example, even if the fabric
independent photonics lab that is wellmight test average a "19", this number
respected internationally in their fieldis always rounded down by 5 digits, in
and is known to be very comprehensive inthis case - rendering a "14" . Because
their test results. The facilityof the minimum UPF level of 15,
created disciplined parameters for UVmentioned above, this result will render
testing based more on the futuresay a "19" to become a "0". Therefore,
interests of the industry. However,this example would view the swatch or
this method is also a much morearticle as under the minimum value for a
expensive testing process.UPF rating, and not yield a rating at
The method employed by textileall even though averaging a 19 in the
manufacturers seeking UV ratings forinitial tests. The same could be said
"woven yarns" is perhaps the one that isfor a tested level of "20", which by the
more incorrectly but commonly used todayprescribed margin of error would result
- and the test protocol is measured forin a UPF of 15. The maximum rating
stretch type fabrics used mainly fordesignate for a textile is UPF50+;
swim and active-wear. As leno fabrichowever, 30 is more than adequate for
is a woven, with various degrees ofthe majority of individuals with
porosity, such tests can stillÂsun-sensitive conditions.
produce erratic results, especially withWhat are the differences in fabric types
ventilated weaves and if the dyeingavailable?
process involves optical brighteners andToday, people interested in sun-care
or titanium dioxides in the pigments.products have different demands. Like
These variables can wreak havoc onthe protective blocks and lotions, there
accurate results.Âare many types of textiles used in
Âapparel that are available to meet
What can create controversy with the newvarious degrees of desired performance
fabrics?based on lifestyle. Tighter (opaque)
As with any consumer goods purchaseweaves and darker colours are usually
involving new and evolving technologies,designed to be worn close to the skin,
one must be careful in relying on poorlyand can assist in blocking a higher
researched magazine or newspaperproportion of ultraviolet light for
articles, which can be quite misleading.longer periods. Whether stretch or
Be sure to read the product detailwoven, these fabrics are used in
descriptions on clothing tags or, ifclothing that is opaque and is worn
purchasing on-line, the description of aalone as a fashion lifestyle or as
product on the web site. If a productswimwear. A drawback to the tighter
does not say, for example, that itweaves and stretch fabrics is reduced
offers up to a 97% block, one should notventilation and increased heat retention
assume that it does, even if other items- which can be a serious liability to
within that product line so say so oncertain individuals in hot climates.
the tag or in the on-line productÂ
description.Other fabrics employ a complex
Do colors affect the UV protectionlightweight weave and design structure
level?that is somewhat looser to encourage
Yes, color is also an important pointcooling airflow, and will provide
when considering clothing for theadditional coverage. These garments are
purpose of sun-block: Darker colorsdesigned to be worn over other favourite
(especially indigo, navy and black)summer-weight weather apparel. This
perform better because they can absorbtype of clothing is a sun-care "booster"
more UV; however the trade-off is thatbut might not be an appropriate
they can create heat as a by-product.recommendation for persons requiring a
Lighter colors will reflect more,high degree of opaque protection or have
especially fabrics with opticalprescriptive conditions that renders one
brighteners. All everyday existingparticularly light sensitive - a
fabrics can be considered to have adrawback to the looser weaves and
sun-protective value, but unlike the(lighter colours) will be the allowance
creams that can have lower values, theof more UV transmission than the opaque
current UPF rating system begins at thefabrics for areas of bare skin under a
minimum UPF level of 15 to permit ansingle layer of fabric, especially if
independent classification.the area is pulled tightly over the skin
When the ASTM D13.65 committee wasand exposed to prolonged time in the
created for the addendum tosun. This drawback is remedied in the
sun-protective fabrics in 1996, a numbercareful construct and loose design of
of textile manufacturers and light andsuch apparel, as the UV light
laser specialists invested about 5 yearstransmittance decreases exponentially
in planning the testing protocol. Evenand dramatically, every millimetre away
today, it is still a work in progressfrom the skin.
and will be updated annually because theSome manufacturers' hats and
results are still inconclusive and meritaccessories, through their fabrication,
more study. Naturally, some of thehave a much higher level of protection,
unique textiles being created today are,and certain styles with multiple
under current lab conditions,layering and fusing agents will afford a
misunderstood.UPF rating up to 40+. While the clothing
What exactly is done in-lab to obtain ais a protective & effective adjunct as
UPF rating? Is it different from "SPF"?long as it is worn as designed, with
Yes, UPF involves a different criterion.the appropriate size chosen by the
While still a work in progress, the UPFindividual for the particular activity
[ultraviolet protection factor] is basedand worn loosely over other
on an entirely different curriculum ofsummer-weight apparel.



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