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Pinlock only in the day?

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Wonko The Sane
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PostPosted: 23:56 - 05 Jan 2014    Post subject: Pinlock only in the day? Reply with quote
Just noticed a badly translated sticker on the visor of my Shark helmet,

It seems to be implying that a pinlock should only be used during the day and not at night.

Anyone know anything?
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MattJ
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PostPosted: 00:02 - 06 Jan 2014    Post subject: Re: Pinlock only in the day? Reply with quote
Black Sheep wrote:
Anyone know anything?


The strongest muscle in proportion to its size in the human body is the tongue.


















Ooooooh, you mean about pinlocks.

Nope, sorry.

Mr. Green
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-Matt-
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PostPosted: 00:03 - 06 Jan 2014    Post subject: Reply with quote
Did it come with a tinted pinlock Razz
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arry
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PostPosted: 00:04 - 06 Jan 2014    Post subject: Reply with quote
It tends to make headlights go streaky and generally horrible. The pinlock instructions do say you should remove it at night

I never bother
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-Matt-
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PostPosted: 00:05 - 06 Jan 2014    Post subject: Reply with quote
arry wrote:
It tends to make headlights go streaky and generally horrible. The pinlock instructions do say you should remove it at night
I never bother
Genuiene reason then Embarassed my bad. I've used mine at night and never noticed anything personally Confused
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arry
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PostPosted: 00:09 - 06 Jan 2014    Post subject: Reply with quote
-Matt- wrote:
arry wrote:
It tends to make headlights go streaky and generally horrible. The pinlock instructions do say you should remove it at night
I never bother
Genuiene reason then Embarassed my bad. I've used mine at night and never noticed anything personally Confused


I do notice the difference but it'd not be enough for me to mess around taking it out
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arry
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PostPosted: 00:12 - 06 Jan 2014    Post subject: Reply with quote
Don't think so - happens on both my lids too
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arry
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PostPosted: 00:18 - 06 Jan 2014    Post subject: Reply with quote
This seems to be the official reasoning

https://pinlockusa.net/FAQ
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thepuma
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PostPosted: 00:19 - 06 Jan 2014    Post subject: Reply with quote
_Iain_ wrote:
Sounds odd. Have you got a smudge on it causing the light to reflect weirdly or something? Have never heard that complaint before Confused


It is a common complaint about pinlocks.....if you Google it you'll see. Ive got 2 pinlock visors and they both do it to varying degrees, but personally I dont see it as a huge issue.....and at the end of the day its better than the visor totally fogging up.
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Walloper
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PostPosted: 00:22 - 06 Jan 2014    Post subject: Reply with quote
I've used pinlock since it was new on Shoei hats. Never read anything about night use with clear visors but tinted are not recommended for night use.
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matto
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PostPosted: 01:18 - 06 Jan 2014    Post subject: Reply with quote
My understanding is that anything that transmits less than 85% light is marked 'not for daytime use' as that is the US standard for visors. UK law however allows for visors that transmit anything greater than 50%.

So unless it's obviously tinted, don't worry... and even then really don't worry too much.
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Walloper
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PostPosted: 01:39 - 06 Jan 2014    Post subject: Reply with quote
matto wrote:
My understanding is that anything that transmits less than 85% light is marked 'not for daytime use' as that is the US standard for visors. UK law however allows for visors that transmit anything greater than 50%.

So unless it's obviously tinted, don't worry... and even then really don't worry too much.


until you mash a pedestrian or don't see a potential SMIDSY till it's too late.

Just sayin'
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barrkel
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PostPosted: 02:01 - 06 Jan 2014    Post subject: Reply with quote
The issue at night is multiple internal reflections from bright lights. If you wear glasses, it's even worse. I don't mind it though.
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Wonko The Sane
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PostPosted: 09:04 - 06 Jan 2014    Post subject: Reply with quote
The helmet does have a drop down and the sticker is on the visor at the side of the drop down's little lever, if it didn't actually say pinlock I'd assume it was saying not to use the drop down at night.
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pinkyfloyd
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PostPosted: 09:22 - 06 Jan 2014    Post subject: Reply with quote
This new helmet I have came with pinlock installed. I sent my boss a message asking if the double vision at night was normal. It is a known thing with pinlock. You soon get used to it and the benefits of being able to ride around in the cold and wet with the visor down fully and not fogging up is worth the slight reflection of lights.
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Christoffee
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PostPosted: 09:25 - 06 Jan 2014    Post subject: Reply with quote
I find it much worse when the visor/pinlock are dirty. If they're clean I don't get any trouble at all.
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iooi
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PostPosted: 10:44 - 06 Jan 2014    Post subject: Reply with quote
matto wrote:
My understanding is that anything that transmits less than 85% light is marked 'not for daytime use' as that is the US standard for visors. UK law however allows for visors that transmit anything greater than 50%..


Which is great... Given that polycarb has a LTF of approx 75%
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Walloper
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PostPosted: 12:59 - 06 Jan 2014    Post subject: Reply with quote
iooi wrote:
matto wrote:
My understanding is that anything that transmits less than 85% light is marked 'not for daytime use' as that is the US standard for visors. UK law however allows for visors that transmit anything greater than 50%..


Which is great... Given that polycarb has a LTF of approx 75%


Well that won't work according to my google engine

Properties of Lexan Polycarbonate
Light transmission 1) 3 mm ASTM-D1003 % 89

https://www.theplasticshop.co.uk/plastic_technical_data_sheets/lexan_polycarbonate_9030_technical_properties_data_sheet.pdf

Where did you get 75%?

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Edit:

Abstract
A Fencing mask with a transparent polycarbonate visor has recently been introduced which replaces the conventional metal mesh mask. The visor is constructed using two polycarbonate sheets, one forming the structural layer and the other a removable scratch
plate. This multilayer system has inherent disadvantages with regard to optical transmission, since the intensity of re¯ected light is related to the difference in refractive index of the materials. As such, a large step change in refractive index leads to greater reflective losses, thereby lowering the intensity of transmitted light. The magnitude of this reflective loss may be calculated using the Fresnel equations.
Light scattering and the appearance of a `ghost' image are a manifestation of the Fresnel reflections. Light reflected at one surface undergoes internal reflection and thus appears
to originate in a different optical plane. Since there are reflective losses at every interface, it is essential to reduce the reflectivity at each step.
Results presented here show that the optical properties of an air-filled multilayer system offer substantially lower transmission than a liquid-filled structure. Modelling of this simple modifcation to the existing mask design has been shown to increase the theoretical transmission of light by a minimum of 7%, with experimental work
substantiating these findings.

Keywords: fencing mask, reflective loss, polycarbonate visor

https://eprints.ulster.ac.uk/937/1/Fencing_paper.pdf
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iooi
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PostPosted: 21:00 - 06 Jan 2014    Post subject: Reply with quote
Walloper wrote:
Where did you get 75%?

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From sticking my clear visor under a optical light transmission meter Thumbs Up

Remember that sticking something like a pinlock reduces LTF again.
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Walloper
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PostPosted: 23:44 - 06 Jan 2014    Post subject: Reply with quote
iooi wrote:
Walloper wrote:
Where did you get 75%?

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From sticking my clear visor under a optical light transmission meter Thumbs Up

Remember that sticking something like a pinlock reduces LTF again.


But but science say 89% Shocked

Very Happy

Is your meter calibrated?
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Type_Mo
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PostPosted: 01:03 - 07 Jan 2014    Post subject: Reply with quote
I found A clear pinlock on a clear visor provides a small tint and thats why i think its printed daytime use only.

The best pinlock warning is on the hjc rpha10 pinlocks Laughing
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Rogerborg
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PostPosted: 09:21 - 07 Jan 2014    Post subject: Re: Pinlock only in the day? Reply with quote
Black Sheep wrote:
Just noticed a badly translated sticker on the visor of my Shark helmet,

It seems to be implying that a pinlock should only be used during the day and not at night.

Anyone know anything?

I know that you can solve that problem by peeling the sticker off.
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