What are those dots behind my mirror?

Discussion in 'General Radar Detector Discussion' started by pillowsplat, Jan 23, 2012.

  1. pillowsplat

    pillowsplat Learning to Fly Beginner User

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    In my quest to find a good spot for my radar detector I went searching. But first I tried to razor blade one Dot off. No Cigar.
    Than goodness for Google.

    It is called a Third Visor Frit. Who Knew it had a name?

    The next question is can the RD penetrate enamel or ceramic paint? I guees I have to find out if they put metal in ceramic or enamel paint.

    Anyway here is an explanation of why we need a frit in our lives.

    "Seeing dots on windshields
    Q: Several years ago, black dots started appearing on new vehicle windshields. The dots are usually only around the periphery of the windshield. What purpose do these dots serve? --Brad, Midland, Texas

    A: Windshield glass contains a black enamel band (called the frit) around the periphery that is baked into the glass. This black band includes a border of dots. See figure. The band has an etched surface to enable adhesive to bond to the glass, says a sales manager at Able Auto Glass. When car manufacturers install the windshield, they bond the windshield to the vehicle with adhesive placed on the etched part of the black enamel glass area (inside surface). The outside of the enamel band shades the adhesive from the Sun and protects it from ultraviolet radiation. The band also serves a cosmetic purpose by covering up the adhesive and gives the windshield edge "a more finished look."

    [Steve Coyle, Auto Glass Specialists] The black dots blend the border into the glass

    Rather than a straight black edge, the dot border blends the solid band into the clear glass, says Steve Coyle at Auto Glass Specialists. Some windshields also use the dots as a third sun visor to block the Sun behind the rearview mirror where most visors don't reach.

    (Answered July 26, 2002)"

    Yep it has metal in it...


    "Pigments
    Pigments or dyes can be natural--clay, calcium carbonate, mica, silicas and talcs, or synthetic-- engineered molecules, calcined clay, precipitated calcium carbonate and synthetic silicas. Hiding pigments, used to make the paint opaque, include phthalo blue, iron red oxide and titanium dioxide coated with silicon or aluminum oxide



    Read more: What Is Enamel Paint Made Of? | eHow.com http://www.ehow.com/facts_7162281_enamel-paint-made-of_.html#ixzz1kL3qYj2V"
     
    Last edited: Jan 23, 2012
  2. Nazar

    Nazar ήσυχο ολοκληρωτής Advanced User Premium Member

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    frit, who would have thought - i use to call it patchwork (but i soon realized i was the only one to call it that :D :rofl:
     
  3. fire65

    fire65 PSL +15 Advanced User

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    First time I ever heard that, thanks for the good info.
     
  4. wrenchedexcess

    wrenchedexcess ΜΟΛΩΝ ΛΑΒΕ Intermediate User

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  5. protias

    protias Train Horn Advertiser Advanced User Premium Member

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    So why does the frit exist?
     
  6. wrenchedexcess

    wrenchedexcess ΜΟΛΩΝ ΛΑΒΕ Intermediate User

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    It exists to block sunlight in between the sun visors.
     
  7. protias

    protias Train Horn Advertiser Advanced User Premium Member

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    ftfy
     
  8. mrkookm

    mrkookm PSL +15 Advanced User

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    ahhhhh this is the important question :) Well I can tell you that in my experience it did impact performance when mounted behind this enamel.
     
  9. CJR238

    CJR238 -CMS Article Admin- Administrator Premium Member

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    I went searching on Google for what my new Mazda Frits (dots around RVM) were made of and it directed me to this post. lol

    Still trying to figure out what mine are made of, but i guess in the end ill just have to test and see if it effects performance on my car.


    Hmmm......

    Mettle should be the only real problem, i bet if i test it with my Fluke meter for continuity that will give me the answer!
     
  10. CRS123

    CRS123 Velocity: r = d / t Intermediate User Premium Member

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    Good detective work finding this post:). Since they don't really serve any purpose besides an additional sun screen....is it possible to razor blade some of them off just in front of the detector?
     
  11. CJR238

    CJR238 -CMS Article Admin- Administrator Premium Member

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    I may just try it.
     
  12. nhdriver

    nhdriver PSL +15 Advanced User

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    I wish...in the automotive tinting world the only thing they do is sand it down the best to lower the profile. I didn't even bother with mine as it's a pain in the rear. I do wonder how they put it on though since it seems like a permanent bond.
     
  13. kpatz

    kpatz 35.5, 35.5, and more 35.5 Advanced User Premium Member

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    My RL is mounted behind the "frits" in my Mazda and I don't notice any issues with performance. But then I haven't done a formal test either. BTW, 3M Dual Lock works great for this. It's also well hidden, not easy to spot from outside the car.

    It is likely to have more effect on laser detection than radar, which isn't necessarily a bad thing since it cuts down on falses. About the only time my RL falses laser is if I use the windshield washer while facing the sun.
     
  14. itwasntme

    itwasntme Premium Member Advanced User Premium Member

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    This is great information. I always wondered what the dots were for. Fairly obvious really, but I never thought to actually look it up. Just always steered clear of them when mounting the detector thinking, "looks like thier's metal in those dots." Yes, if I owned the car, I'd try scraping them off. Maybe just start with one dot to see if pops off or, if there's residue. Plus, seems like you'd have to clear an area a little larger than the detector end, at least the thickness of the glass, just to make sure the antenna has a good angular view if there is some small space between the antenna and the glass. Maybe that's being a little ridiculous because, the dots are only on the inboard side of the windshield.
     
  15. BestRadarDetectors

    BestRadarDetectors Manufacturer/Vendor Advanced User Manufacturer/Vendor Premium Member

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    Never heard the term... Dot Matrix?
    That is the term used for as long as I can remember.

    You can use a Razor Blade if you want to remove them. They are just dots of paint painted onto the windshield.
     
  16. nhdriver

    nhdriver PSL +15 Advanced User

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    I didn't know you could take them off??? I'd be afraid to scratch the glass with a razor blade...it's bad enough even a stainless steel can still scratch a glass with enough pressure.
     
  17. CJR238

    CJR238 -CMS Article Admin- Administrator Premium Member

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    It depends on what the dots are made of, some are ceramic, some are paint ect..

    From my research they don't come off easily.
     
  18. bairice

    bairice PSL +5 Intermediate User

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    CJR, did you end up finding any evidence whether the dots on your 2014 Mazda3 affect RD reception?
     
  19. Vehicle 1

    Vehicle 1 Premium Member Advanced User Premium Member

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    A while back I did a quick test with my V1 and the dots of my Sierra truck, they minimally affected the V1 performance.

    The way I quantified it, is that the frits took about a half dot strength from my V1. I had to time and average dot strength for a bit to come up with this. Not the most scientific test, but I did notice a slight reduction, not enough to make me want to move the detector though. Where I live, the V1 does beautifully even behind the frits.
     
  20. Thunderbolt

    Thunderbolt PSL +5 Intermediate User

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    We're all going to sound like glass pro's now, casually tossing "frits" into a sentence, even though we've never heard of the term before this thread. lol