I like and respect Doug. We have spoken on the same panel before
and only disagreed once. We don’t agree on every single point, but
I do agree with the vast majority of what he says. And if you
haven’t checked out his videos (Doug Schoon’s Brain) then you are
really missing out.
And, no I was not quoting his book, the message came straight out
of my head from years of research and development experience. I
have been making gel for quite a while now.
This is one of the points I disagree with.
Technically, in a best case scenario a 9w bulb used to cure gel,
puts out 1.9w of UV energy directly at the surface of the bulb.
However in normal usage approximately 1.5 watts reaches the nail.
In my previous message said 1.5, because I was speaking in general
terms. Once it drops below about 0.7 or so at the point of curing,
most gels will fail to cure properly. This is why 4w bulbs don’t
work, because they produce less than 0.7 UVw/cm2 at the point of
curing. You could formulate to cure with a 4watt bulb . However
in my previous message; remember I said you had to change a
variable? You must choose the variables that are most desirable to
you. We formulate to the available equipment on the market. It is
much easier to change a chemical then to invest in a light bulb
manufacturing plant.
ADD Moment
Bulb UV wattage will vary +/- .1 - .5, (again in general terms of
variance, technically you could take the decimal out a few spaces
to get a more exact variance, not every bulb measures at exactly
1.9w) (This is assuming you are taking the measurement at the very
beginning of the life of the bulb).
ADD Moment over.
I can get into an extremely technical discussion, however most
people don’t have the technical training to understand the exact
science, so I attempt to put it into generalizations and use
examples that most people can relate to. Besides the technical
stuff is really boring.
A 9w compact florescent bulb uses 9 watts of electricity to fire.
However in the terms of a UV bulb, most of the energy is wasted on
visible light. Doug uses the example of temperature to say that a
90°F surface is really only 15°F, however we are not talking about
the absence of cold. We are talking about the amount of
electricity that is converted inside the bulb by to make light (it
is much more complicated than this, but I am again making a
generalization, or I would be typing forever and I might fall
asleep). If a 9w bulb used all 9 watts to make UV energy, then it
would look to the human eye as if it wasn’t on. Because we cannot
see UV light (energy). Some of the electricity must be used to
produce the visible light that we see so it is impossible for the
bulb to produce 9 watts of UV energy. We may be getting confused
here about measuring electricity in watts vs. measuring the
incident power density in watts. Two different measurements.
Now do you see why I didn’t get into this stuff?
UV energy (it is actually called electromagnetic radiation, but I
like to use energy because radiation scares people) can be measured
in a number of different ways. Energy per photon is one of them.
However it can also be measured in watts per whatever. In my
example I used watts per square centimeter, because that is what I
use to calculate the effectiveness of curing. It can also be
measured by fluence rate or UV dose, which is a measure of total
energy absorbed, millijoule per square centimeter or milliwatt
second per square centimeter. To obtain the UV dose (fluence) you
would multiply the unit you are measuring by the number of seconds
of exposure.
UV energy is the same thing as visible light, just at a shorter
frequency. Visible light is electromagnetic radiation as are radio
waves, x rays and infrared. Your cell phone works on
electromagnetic radiation too. If memory serves me correctly the
old school bag phones were 3 to 5 watts, the phones today are I
believe 0.6 watts. There are many ways to measure electromagnetic
radiation. The way I measure the intensity (incident power
density) is in watts per square centimeter at the desired cure
point in a 3d space. Doug may do it differently, such as he has
suggested by measuring the energy in joule seconds.
ADD Moment:
On a slightly different tangent I want to clear up the radiation
thing before I start getting phone calls. UV does not charge an
object with radiation. It does not make anything “radioactive”
ADD Moment over.
Ok great, now I have a headache! Maybe it’s the radiation from my
cell phone? I’m going to go wrap my head in tin foil now. ;-)
Erick Westcott, CEO
Gelousy Gel Nail Systems
1745 W Deer Valley RD STE 124
Phoenix AZ 85027
602-493-9043
Fax: 602-493-2544
[email protected]
www.gelousy.com
From: [email protected] [mailto:[email protected]]
On Behalf Of Holly L. Schippers
Sent: Tuesday, May 11, 2010 3:54 AM
To: BeautyTech E-List
Subject: RE: NailTech:: UV "output"
via Doug Schoon:
"It makes no sense to say that a 9 watt UV bulb puts 1 1/2 Watts of UV
energy, wouldn't that make it a 1 1/2 watt bulb?
That's like saying the temperature of a object that is 90°F is
really only
15°F. That makes no sense.
UV energy is not measured in wattage.
All this person had to do was look up Ultra Violet on Wikipedia and
would
see that UV energy is measured in "energy per photon".
http://en.wikipedia.org/wiki/Ultraviolet.
The rest of what he says is basically what I am saying in my book,
in fact
sounds very similar to what I say in my book. I hope they've read
it. It's
better for everyone to be on the same page with this information.
Overall,
I'm impressed by the quality of the information provided below and
what it does
to address most of the myth you hear."
Holly L. Schippers
CND Education Ambassador
[email protected]
641-660-4058 c
Visit cnd.com for the latest in products, education and nail fashion!
> From: [email protected]
> To: [email protected]
> Subject: RE: NailTech:: UV "output"
> Date: Sat, 8 May 2010 11:00:58 -0700
>
> The figures I provide are generalizations. No two bulbs or two
lamps are
> exactly the same, but the following are general guidelines:
>
> A 9w UV bulb is putting out about 1.5 watts of UV energy.
>
> You cannot see UV energy. The blue light you see is in the
visible spectrum
> above 400 nanometers and is not effecting the curing of the
product at all.
>
> Just as important as the bulb, if not more so, is the enclosure
(It is
> confusing, but bulbs are actually called lamps and lamps are called
> fixtures).
>
> More important than how much energy the bulb is putting out is
how much is
> reacting with the enhancement. You need to be concerned with the
watts per
> square centimeter at the location of the curing point. Most
people will not
> be able to give you this figure, because they have no way of
measuring it.
> With us, we consider it a trade secret. Different gels cure
differently, so
> we have tolerances that we stay within when analyzing the available
> equipment and raw materials. If the final product is within
tolerance, then
> we know it will cure. Otherwise we need to change the product or the
> equipment. If you are using a UV gel that is out of the tolerance
for the
> lamp you are using, it won't cure properly. The emission from the
lamp will
> change over time and will eventually drop below tolerance. The
life of the
> bulb can be extended by cleaning it, or flipping it over. The
tolerance of
> the lamp can be maximized by keeping it clean.
>
> Dirty bulbs and a dirty lamp will affect the curing, because the
dirt will
> absorb the energy instead of reflecting it to the nail.
>
> There are lamps that have 8 9w bulbs, however I always discourage
people
> from using them, because they are generally not designed
properly. The
> chamber is too large for the UV energy to effectively reach the
nail with
> normal use.
>
> Some of the smaller 9w lamps with only one bulb have the same
problem, you
> need to position the nails properly under the bulb.
>
> There are other factors such as reflector and socket position as
well. The
> Chinese factories don't innovate when it comes to UV lamps, they
duplicate.
> An engineer needs to design and test a lamp to cure a particular
product.
> Then it can be made for pennies on the dollar in China. On the
other hand
> you can get an off the shelf lamp and design a product to work
with it.
> Some generic lamp designs are just flawed to begin with and won't
cure
> anything.
>
> If you buy your lamp and bulbs from the manufacturer, then they are
> guaranteed to work. Not to say that a different brand will or
won't. It
> very well may, but then it may not. We just can't test everything
out
> there.
>
> A compact florescent bulb may have an estimated life of 8000
hours before it
> fails. But failing is not the same thing as not emitting enough
UV to cure
> a product. Over time the intensity of the bulb will drop, as the
gas inside
> the bulb is reacted. Once the bulb stops emitting enough UV
energy at the
> position of curing, you need to change something.
>
> 1. Move the position of curing to a place of higher intensity
> 2. Change the material you are trying to cure.
> 3. Perform maintenance on the lamp and bulb to attempt to
increase the
> energy at the cure point to within tolerance.
> Or
> 4. Replace the equipment.
>
> Without testing equipment you should replace your bulbs according to
> manufacturer instructions. With some products UV bulbs will fall
out of
> tolerance for that product in 200 hours. With our product, the
time is
> closer to 500 hours.
>
> The general guidelines I use are to replace them every 6 months
if you are
> using them every day and once a year if you use them every once
in a while.
>
> Hope that helps.
>
> Erick Westcott, CEO
> Gelousy Gel Nail Systems
> 1745 W Deer Valley RD STE 124
> Phoenix AZ 85027
> 602-493-9043
> Fax: 602-493-2544
> [email protected]
> www.gelousy.com
>
>
>
> On May 8, 2010, at 9:53 AM, [email protected] wrote:
>
> > Can anyone actually tell us what exactly the output is in the CND
> > lamp? Or any other company want to tell us the output of their
bulbs/
> > lamps?
> > I have started to dig into researching this and for nails there
is not
> > much I am finding. I need more time and will hopefully find out
the
> > answer.
> > BUT- what I HAVE found is this output thing really has to do with
> > water sterilization and not nails.
> > Also, BIGGIE here-- 9 watt bulbs have an 8000 hour life. And
that is
> > every site I looked at. NOT sites selling bulbs; sites explaining
> > bulbs.
> > SOOOOOO, anyone want to tell me how if these bulbs have that much
> > life- why do we need to change them so often. IF they are kept
free of
> > dust, then they will last for forever! The UV will absorb into the
> > dust on the lights, making them less effective. Soooo, if we
keep our
> > vulbs clean, we never should have to purchase new bulbs.
> > I want to know what the output for Creative's lamp is. I just
pcannot
> > accept that it "just is."
> > Buenos dias,
> > Lynnette
> > http://www.facebook.com/nailtech Sent via BlackBerry from T-
> > Mobile
> >
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> > .
> >
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