Mosquito sunscreen !!?

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Downunder35m
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Mosquito sunscreen !!?

Post by Downunder35m »

If we trust research than these flying vampires are less like a dumb insect and more like a dedicated sensor bank with suction mode.

Some people claim mozzies leave them alone, others can't seem to avoid them even if just quickly getting the mail from the letter box.
So, with no intention to be correct I qutoe a bit of the latest blahblah on how mozzies find you:

The initial trigger is the CO2 we exhale.
Being exposed to the right amount of CO2 in a spot makes the optical receptors and the tiny mozzie brain go into over drive.
A bit like you getting fully alert when crawling out of bed to jump under a cold shower.
Their vision improves, or to be precise sems to focus really strong in the red spectrum of the light.
The only thing out there reflecting this much red while also producing CO2 is things filled with blood - YOU and me.
And so the curious girl follows the trail of CO2 and red until it is able to directly sense the warmth coming from this potential food source.
At the last few centimeters these litle suckers can even directly see the diferent shades of red produced by all those blood vessels close to your skin.
And no, your skin color has no affect here as the amount of red light you emit is virtually the same.

I did mention they seem to be perfectly equippend for the task that now can't be avoided?
Once they land it only takes seconds to drain you out....

The usualy repellants work by making the experience of poking us very unpleasant, or even fatal.
Sadly though this is not always enough as the little suckers still try.
Only if they are so disgusted by the intital skin contact that it stinks they give up early.
Only those early stops prevent their juices from entering your tissue ;)

Why not mess with the factors that allows them to find you?
We can't stop breathing but we can use clothing that is of green ,white, blue or such colors and WON'T let too much light pass through.
And how hard would it be to create some sort of "sunscreen" that filters our the red and maybe the cyan areas of the light?
When going in the snow people already like to go with colorful noses and ears - here the coloration of the sunscreen is to let you know you might have lost a bit in the last face slide downhill...
I really think that a dedicated red filter you can apply like sunscreen on exposed skin should mess up those mozzies quite a bit.
And if it also contains some natural defense like teatree or eucalyptus oil even those mozzies that reached you anyway should be disgusted by your taste and buzz off.

Anyone here into making of cremes, lotions or other skin care products who could mix something up?
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Orngrimm
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Re: Mosquito sunscreen !!?

Post by Orngrimm »

White - Red = Greenish?
So... Unlike you wont to look like the Witch from Ozz, you probably wont like to paint your face and body green... ;)
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Downunder35m
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Re: Mosquito sunscreen !!?

Post by Downunder35m »

Not really....
Sunscreen blocks mainly UV light with the pigments and other additions in it.
A white cotton shirt keeps looking white ;)
I was more thinking in the area of how sunscreen works - reflecting the light, in this case what comes from the boy but not necessarily in the same way it reflects natural light hitting you.
After all it won't take that much to create something that is full of red or at least creates a "blurry" image of our blood vessels.
Check make up - a good foundation won't let anything through from the skin but appears in the color of the foundation.
A mozzie screen would not have to be that dense me thinks....
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Re: Mosquito sunscreen !!?

Post by Orngrimm »

Downunder35m wrote: Sat Feb 12, 2022 11:12 pmSunscreen blocks mainly UV light with the pigments and other additions in it.
..
I was more thinking in the area of how sunscreen works - reflecting the light,
It is MUCH more complicated. Sunscreen CONVERTS the UV to IR. Thats why you dont feel cooled down by sunscreen even thou a good portion of the light is "blocked"... becuase it isnt but converted to a frequency which is not this harmfull and deep penetrating into the skin.

There are a few sunBLOCKER (those white covering pastes) which block and reflect UV. But the normal, rub-on, oily or vanishing creams... They all convert the UV-spectrum to heat by absorbing. Not reflecting. The chemistry is quite interesting if you dive into it honestly...

https://labmuffin.com/more-spf-mythbusting-with-video/

Also, Check out the video @

or

It shows a Camera with UV-Filter removed and a large part of visible light blocked.
Where the sunscreen is on the skin, it turns very dark. This means: No UV is re-emitting from those spots. If if would reflect / scatter UV (And it would have to do a better job at it than the skin to have a beneficial effect) those sunscreencovered spots would turn brighter as more UV is reflected off the skin (and thus also partially into the camera).
Thus i stay with my answer: Sunscreen does not reflect UV but absorbs it by turning it into IR/heat.
And as only 2-5ish% of the sunlight is UV-A / UV-B here at earths surface, this is not a too big energy-spike added to the already baking sun with its huge IR-parts...
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Downunder35m
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Re: Mosquito sunscreen !!?

Post by Downunder35m »

Interesting indeed....
Not too sure though if it applies to what we use in AU.
Anything you get here that is "acceptable" is at least SPF 50+
I remember how a government run sunsmart website several years ago highlighted the differences between normal sunscreen and those products designed for the Aussie sun.
Can't remember the ingredients listed to be responsible but can take a pic of some sunscreen when I go shopping and won't forget.
Apearently there is pigments included that aim to REFLECT most of the UV spectrum.
Like in the sticky stuff titanium dioxide and zink oxide is certainly still in it to a good amount.
If I am not mistaken both absorb UV light.
There is also serveal "organic" varieties available down here, usually with very fine mineral particles aimed to reflect and absorb things.
Personally I can feel a clear difference between EU style SPF 30 and Aussie style SPF 50+ screens.
The later feels noticably cooler in the sun.
And I mean in more than the about 1.1% difference in blocking/ absorbtion quality.

Anyway....
Old sunscreen was white due to the huge particle size....
What about micro particles that reflect light differently?
To us it would blend into the skin tone like modern sunscreen.
But shouldn't the mozzie see the many different color tones and hopefully get confused enough to seek a different target?
If instead of a blood vessel upon landing it can only see a scattered image it might be enough already......
Just saying...
Desperate here as we have Ross River, necrotic bacteria and more transmitting by these vampires and I suffer from a normal bite already for a full week LOL
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Orngrimm
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Re: Mosquito sunscreen !!?

Post by Orngrimm »

titanium dioxide and zink oxide both reflect and scatter UV and dont absorb it. Those are "inorganic" sunscreens.
Organic has normally really weird sounding ingredients and nothing like titanium dioxide and zink oxide...
usually with very fine mineral particles aimed to reflect and absorb things.
If inorganic particles = normally reflecting / scattering and not absorbing UV.

in general it can be said:
Organics = Absorbing UV and converting to IR. Invisible on skin after application normally
Inorganics = Reflecting / scattering. Metaloxides are very common. Visible as bright / whitish layer on skin after application. There are slowly coming sunblockers out with nanoparticles of Zinc oxide but initial research shows it is mostly a hypeword and it may be similar effective as "old school" sunblocker if applied with the same cover in crosssection as the larger particles. Blocking is blocking. Smaller particles need more particles to block.
I saw the sawdust-Analogy more than once: A solid board resists a certain impact. If you have the same VOLUME as sawdust, not a lot happens. Only if you go with the same MASS as the wood (Now in bigger volume mostly) you get slowly into the region of usefullness again but normally even the same mass of sawdust cant withstand the same impact as when it was solid wood beforehand)

Basically, your best bet in the fight against mosquitos would be a good reflector of IR and UV. Like the inorganic sunblocker (White paste, stays white on skin) as this would "mimic" the sunlight reflected on a rock or something similar and not a human.
As soon as additional IR is sent out from your body, mosquitos will see this.
Basically, a IR-dense shirt / clothing would also help a great deal. Unfortunately, i think this would also result in super warm clothing as it would trap radiated heat from your body (= IR).
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