Tin Pot
Guru
What's a tag holder?
Windscreen question
- Thread starter Chromatic
- Start date
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What's a tag holder?
OP
OP
Chromatic
Legendary Member
- Location
- Gloucestershire
A tag holder is a holder for your tag
. A tag is an electronic gizmo that lets you go through tolls without stopping to pay. You stick them on the inside of your windscreen and sensors pick up a signal as you approach the barrier, you pay up front and top them up as and when required. She has one for the Severn Bridge and one for the Tamar bridge.
Tin Pot
Guru
Ah right.A tag holder is a holder for your tag
I had a sanef one that didn't work, but it stuck itself to the windscreen.
Salad Dodger
Legendary Member
- Location
- Kent Coast
I had a car where the interior mirror fell off. My DIY skills are, I accept, terrible, but I successfully stuck the mirror back with glass bond adhesive and had no further problem with it. A rare success for me.
Joey Shabadoo
My pronouns are "He", "Him" and "buggerlugs"
Which is why my optician advised that Transitions/Reactolite lenses were a waste of time for driving as they wouldn't do anything because of the windscreen.
It says Americans.
Levo-Lon
Guru
Weren't they just the best car ever
.. My wife had one in our dating days..truly a bag of bolts..The engine was great tho..sadly that was its only quality
Please explain why reactolites do buy work in cars, or why we cannot cure a in curing resin using a high powered uv light through the glass, I am happy to be educated.
Tanis8472
Guru
Photochromatic lenses don't work through windscreen as it requires UV light to activate which is mostly blocked by it.
I would assume the curing works because you are using high power UV.
I would assume the curing works because you are using high power UV.
winjim
Straddle the line, discord and rhyme
Note that User's link refers to side and rear window glass which is not treated to block UVA. It also refers to cumulative damage from long term exposure. Glass will block some wavelengths of UV and attenuate others.
Photochromic lenses are exposed to light mainly through the windscreen and will require a high intensity of a specific wavelength to work. The blocking through the windscreen and attenuation through the side windows would be enough to prevent this. UV resin curing would also require high intensity of a specific wavelength. I suppose it might cure eventually through window glass but the photochemical reaction rate is so slow to be effectively useless.
Feynman was concerned about acute damage to his eyesight and calculated that the UV attenuating effect of the glass (I don't know if windscreens were UV treated in the 1940s) would be enough to protect him. His skin exposure from inside the truck would also be less than that of his colleagues whose only PPE was a pair of dark glasses. He was one of the finest quantum physicists of his generation, I trust he knew what he was doing.
Photochromic lenses are exposed to light mainly through the windscreen and will require a high intensity of a specific wavelength to work. The blocking through the windscreen and attenuation through the side windows would be enough to prevent this. UV resin curing would also require high intensity of a specific wavelength. I suppose it might cure eventually through window glass but the photochemical reaction rate is so slow to be effectively useless.
Feynman was concerned about acute damage to his eyesight and calculated that the UV attenuating effect of the glass (I don't know if windscreens were UV treated in the 1940s) would be enough to protect him. His skin exposure from inside the truck would also be less than that of his colleagues whose only PPE was a pair of dark glasses. He was one of the finest quantum physicists of his generation, I trust he knew what he was doing.
Beebo
Firm and Fruity
- Location
- Hexleybeef
Mine developed a distinct lean when the hydra gas suspension system failed on one side.Weren't they just the best car ever
The engine was great tho..sadly that was its only quality
Nibor
Bewildered
- Location
- Accrington
Meths is not oily it is every bit as good as Isopropanol and a lot cheaper.
subaqua
What’s the point
- Location
- Leytonstone
really. then something must have been added by somebody to the purple stuff I have been using for 20 odd years as its awful.
methanol on its own yes - great, but methylated spirits - horrible
Nibor
Bewildered
- Location
- Accrington
Always works fine for me
twentysix by twentyfive
Clinging on tightly
- Location
- Over the Hill
Left sitting around water from the air will dissolve in it. That can leave a messy wipe behind.
