The makers of
PhotoBlocker spray claim that their product will make your license plate invisible to photo radar, red light cameras, and infrared and laster cameras. Special crystals in the spray will reflect back the flash (or light source) used by these cameras, making your license look like a bright blur. Would this actually work? Would it be legal if it did? They say that the spray is invisible to the naked eye, which means that it won't be of much use if a cop pulls you over. Personally, I've always thought someone should make a stealth car, made out of the same material as the stealth airplanes. That would be cool. (via
Red Ferret)
Comments
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Boy, you just can't argue with logic like that.
I've just received a can of Photoblocker spray, with the intention of doing objective, controlled, fully technically legitimate, irrefutable testing.
The spray was purchased directly from an official website, so there's minimal chance of it being a poor quality, cheap counterfeit.
I should say: there is no way I can prove if it absolutely works, but I can prove it if does absolutely nothing at all.
It does not increase the reflectivity of a UK legal retro-reflective registration plate (this being highly reflective anyway); in fact the spray slightly reduced the reflectivity. All it does is create a slightly rough, glossy surface. So much for "over-exposing"!
I cannot show the raw results as I used my own registration plate for the examination.
If I do get results that I can show, I will probably place them on the Safe Speed website.
I think you need to read the post prior to yours.
The spray does NOTHING; my half-plate testing proves this. Half of the plate was sprayed, the other half covered; this enabled a direct side-by-side comparison.
- It does not affect the retro-reflectivity of the characters
- It does not affect the retro-reflectivity of the background
Given these results, it is obvious that your idea cannot work.
Have any of you taken a photo of your car's license plate when the light conditions are such that the flash goes off... Go and have a look at your photos where there is a car in the background, or go and take a photo and have a look at it... Now-when you take ordinary photos of an ordinary (non-photblocked) car where the flash was triggered, you will notice that WITHOUT photoblocker, the naturally reflective surface of the plate is such that all you get is an overexposed licence plate - a white glare so bright that you can’t read the plate...
Now, consider this - if a NORMAL camera, taking a photo of a NORMAL plate, is enough to make the plate unreadable, it stands to reason that the authorities have long ago developed a camera/flash that does NOT glare like a normal camera would, in order for them to recognise your licence plate... and if they have done this FROM THE ONSET, what makes you think that you can outsmart their camera's by spraying a glossy/reflective finish over an already reflective surface, a catachrestic of a NORMAL, NON-PHOTOBLOCKED licence plate that was overcome years ago....????
I’m Sorry, but until their websites can explain SCIENTIFFICALLY how their product "reacts differently" to a flash, I will not buy it. Merely showing me a before and after photo of an effect my normal camera en licence plate does ANYWAY, is not going to convince me..