Is it just so they don't show the muck, or is there something in the black
that is needed to give the tyre the correct properties. After all for a
while white wall tyres were all the rage.

If it does not matter, I foresee blinged up cars, not just with purple
lights underneath, but illuminated tyres that are semi transparent apart
from the steel bits.
Brian

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On 24/02/2024 10:26, Brian Gaff wrote:
> Is it just so they don't show the muck, or is there something in the black
> that is needed to give the tyre the correct properties. After all for a
> while white wall tyres were all the rage.
>
> If it does not matter, I foresee blinged up cars, not just with purple
> lights underneath, but illuminated tyres that are semi transparent apart
> from the steel bits.
> Brian
>

Quite a number of bicycle tyres are "non black"

I suspect that some black colouring agent is added, as pure latex is
almost snow white and the sulpur used in the vulcanising process is a
sort of fudgy beige / mud colour.

Its possible that those beige / tan coloured tyres which are often seen
on kids bikes are close to the "natural" shade of tyre rubber

btw, we already have "blinged up cars with purple lights underneath" -
you need to get out more

In article <urco7u$16ivu$1@dont-email.me>, Abandoned Trolley <fred@fred-
smith.co.uk> on Sat, 24 Feb 2024 at 12:42:39 awoke Nicholas from his
slumbers and wrote
>On 24/02/2024 10:26, Brian Gaff wrote:
>> Is it just so they don't show the muck, or is there something in the black
>> that is needed to give the tyre the correct properties. After all for a
>> while white wall tyres were all the rage.
>>
>> If it does not matter, I foresee blinged up cars, not just with purple
>> lights underneath, but illuminated tyres that are semi transparent apart
>> from the steel bits.
>> Brian
>>
>
>
>Quite a number of bicycle tyres are "non black"

I understood that the black colour comes from carbon black which is a
component which, among other components, gives the tyre robustness.
(That is me parroting my chemistry teacher from 60ish years ago.)As far
as I know the white of whitewall tyres is only 'skin' deep. On my
wife's bicycle the Kevlar bicycle tyres have a white wall on the
outside, inside they are greyish.
>
>I suspect that some black colouring agent is added, as pure latex is
>almost snow white and the sulpur used in the vulcanising process is a
>sort of fudgy beige / mud colour.
>
>Its possible that those beige / tan coloured tyres which are often seen
>on kids bikes are close to the "natural" shade of tyre rubber

They are probably made from a polymer(s) without any reference to rubber
and made more for appearance than functionality.
>
>btw, we already have "blinged up cars with purple lights underneath" -
>you need to get out more

Ah yes, the 'look at me' cars. 'I am noisy and brightly coloured
therefore I have a big qbat.' BTW I do not have a big qbat but then I
have not seen my shoe laces for years. Nothing like drawing attention to
yourself if you are carrying something dodgy or just driving in a dodgy
manner.

--
0sterc@tcher -

"Où sont les neiges d'antan?"

The main reasons for using carbon black as a filler in the tyre rubber
are to protect against ultra violet degradation and to increase wear
resistance.

It stops the UV light affecting more than a very thin layer on the outside.

White wall tyres used either a separate piece of white rubber or it was
a very thin layer added while in the mould. You can still buy the
conversion kits, or send your tyres to a specialist who can bond a layer
of white rubber to a normal tyre. If you ask nicely, I am sure other
colours are available.

On 24/02/2024 10:26, Brian Gaff wrote:
> Is it just so they don't show the muck, or is there something in the black
> that is needed to give the tyre the correct properties. After all for a
> while white wall tyres were all the rage.
>

--
Tciao for Now!

John.

On Sat, 24 Feb 2024 10:26:51 -0000, Brian Gaff <brian1gaff@gmail.com> wrote:
> Is it just so they don't show the muck, or is there something in the black
> that is needed to give the tyre the correct properties. After all for a
> while white wall tyres were all the rage.
>

The black is from lamp black (Very finely divided pure carbon). It
serves several purposes. It toughens the rubber, it lowers the rolling
resistance, and provides UV resistance. It can be a substantial weight of the
tyre.

Lamp black is usually made from the incomplete combustion of hydro
carbons, often natural gas.

--
The NHS will last as long as there are folk left with faith to
fight for it. - Aneurin Bevan

I only know what others tell me. Just behind my house is an open space with
garages that no longer fit current cars, and the youfs apparently congregate
there with their sub woofers etc, and they purple lit cars.
Brian

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"Abandoned Trolley" <fred@fred-smith.co.uk> wrote in message
news:urco7u$16ivu$1@dont-email.me...
> On 24/02/2024 10:26, Brian Gaff wrote:
>> Is it just so they don't show the muck, or is there something in the
>> black
>> that is needed to give the tyre the correct properties. After all for a
>> while white wall tyres were all the rage.
>>
>> If it does not matter, I foresee blinged up cars, not just with purple
>> lights underneath, but illuminated tyres that are semi transparent apart
>> from the steel bits.
>> Brian
>>
>
>
> Quite a number of bicycle tyres are "non black"
>
> I suspect that some black colouring agent is added, as pure latex is
> almost snow white and the sulpur used in the vulcanising process is a sort
> of fudgy beige / mud colour.
>
> Its possible that those beige / tan coloured tyres which are often seen
> on kids bikes are close to the "natural" shade of tyre rubber
>
> btw, we already have "blinged up cars with purple lights underneath" -
> you need to get out more

My friend tells me that some cars have stuck on tinted windows with mirrored
outsides, which are apparently not legal.

Brian

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"Nicholas D. Richards" <nicholas@salmiron.com> wrote in message
news:D3J$VWAaDf2lFA94@salmiron.com...
> In article <urco7u$16ivu$1@dont-email.me>, Abandoned Trolley <fred@fred-
> smith.co.uk> on Sat, 24 Feb 2024 at 12:42:39 awoke Nicholas from his
> slumbers and wrote
>>On 24/02/2024 10:26, Brian Gaff wrote:
>>> Is it just so they don't show the muck, or is there something in the
>>> black
>>> that is needed to give the tyre the correct properties. After all for a
>>> while white wall tyres were all the rage.
>>>
>>> If it does not matter, I foresee blinged up cars, not just with purple
>>> lights underneath, but illuminated tyres that are semi transparent
>>> apart
>>> from the steel bits.
>>> Brian
>>>
>>
>>
>>Quite a number of bicycle tyres are "non black"
>
> I understood that the black colour comes from carbon black which is a
> component which, among other components, gives the tyre robustness.
> (That is me parroting my chemistry teacher from 60ish years ago.)As far
> as I know the white of whitewall tyres is only 'skin' deep. On my
> wife's bicycle the Kevlar bicycle tyres have a white wall on the
> outside, inside they are greyish.
>>
>>I suspect that some black colouring agent is added, as pure latex is
>>almost snow white and the sulpur used in the vulcanising process is a
>>sort of fudgy beige / mud colour.
>>
>>Its possible that those beige / tan coloured tyres which are often seen
>>on kids bikes are close to the "natural" shade of tyre rubber
>
> They are probably made from a polymer(s) without any reference to rubber
> and made more for appearance than functionality.
>>
>>btw, we already have "blinged up cars with purple lights underneath" -
>>you need to get out more
>
> Ah yes, the 'look at me' cars. 'I am noisy and brightly coloured
> therefore I have a big qbat.' BTW I do not have a big qbat but then I
> have not seen my shoe laces for years. Nothing like drawing attention to
> yourself if you are carrying something dodgy or just driving in a dodgy
> manner.
>
> --
> 0sterc@tcher -
>
> "O� sont les neiges d'antan?"

Hmm, OK but it makes tyres heavier. I do notice that yellow cable ties as
sold in pound stores, do fall to bits in the sun eventually, whereas the
black ones do not. Maybe its the same reason. Mind you the posh black ones
are three times the cost!

I remember once using a block of rubber material, a bit like a giant pencil
rubber, as an insulator on the bottom of a vertical aerial. It only lasted a
couple of years then ended up as dust. I went over to using an empty wine
bottle like everyone else did.
Brian

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"Julian Macassey" <julian@n6are.com> wrote in message
news:slrnutotlg.v38l.julian@n6are.com...
> On Sat, 24 Feb 2024 10:26:51 -0000, Brian Gaff <brian1gaff@gmail.com>
> wrote:
>> Is it just so they don't show the muck, or is there something in the
>> black
>> that is needed to give the tyre the correct properties. After all for a
>> while white wall tyres were all the rage.
>>
>
> The black is from lamp black (Very finely divided pure carbon). It
> serves several purposes. It toughens the rubber, it lowers the rolling
> resistance, and provides UV resistance. It can be a substantial weight of
> the
> tyre.
>
> Lamp black is usually made from the incomplete combustion of hydro
> carbons, often natural gas.
>
>
> --
> The NHS will last as long as there are folk left with faith to
> fight for it. - Aneurin Bevan

Julian Macassey <julian@n6are.com> writes:

> On Sat, 24 Feb 2024 10:26:51 -0000, Brian Gaff <brian1gaff@gmail.com> wrote:
>
>> Is it just so they don't show the muck, or is there something in the black
>> that is needed to give the tyre the correct properties. After all for a
>> while white wall tyres were all the rage.
>>
>
> The black is from lamp black (Very finely divided pure carbon). It
> serves several purposes. It toughens the rubber, it lowers the rolling
> resistance, and provides UV resistance. It can be a substantial weight of the
> tyre.
>
> Lamp black is usually made from the incomplete combustion of hydro
> carbons, often natural gas.

But it is no longer necessary for hordes of urchins to go door to
door, offering to wipe out the glass chimneys of maladjusted oil lamps
with a soft swab and remit the swabs to industrial employers for
processing into barrels of lamp black. Progress.

--
Mike Spencer Nova Scotia, Canada

Yes obviously, but where does it come from in this clean world we are
supposedly moving toward? Brian

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"Mike Spencer" <mds@bogus.nodomain.nowhere> wrote in message
news:87le76scq3.fsf@enoch.nodomain.nowhere...
>
> Julian Macassey <julian@n6are.com> writes:
>
>> On Sat, 24 Feb 2024 10:26:51 -0000, Brian Gaff <brian1gaff@gmail.com>
>> wrote:
>>
>>> Is it just so they don't show the muck, or is there something in the
>>> black
>>> that is needed to give the tyre the correct properties. After all for a
>>> while white wall tyres were all the rage.
>>>
>>
>> The black is from lamp black (Very finely divided pure carbon). It
>> serves several purposes. It toughens the rubber, it lowers the rolling
>> resistance, and provides UV resistance. It can be a substantial weight of
>> the
>> tyre.
>>
>> Lamp black is usually made from the incomplete combustion of hydro
>> carbons, often natural gas.
>
> But it is no longer necessary for hordes of urchins to go door to
> door, offering to wipe out the glass chimneys of maladjusted oil lamps
> with a soft swab and remit the swabs to industrial employers for
> processing into barrels of lamp black. Progress.
>
>
> --
> Mike Spencer Nova Scotia, Canada

So what is the black deposit you often get holding your hand above a candle,
no far enough away to not burn it silly, but there used to be a kind of
sooty substance deposited there even after just a few seconds. I can
remember it from my childhood. Candles are interesting though as some of the
wax from candles are hotter than others. I remember being told at school
that candles used to be marked with black lines to act as basic clocks.
Seems a bit imprecise if you ask me.

Brian

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"Mike Spencer" <mds@bogus.nodomain.nowhere> wrote in message
news:87le76scq3.fsf@enoch.nodomain.nowhere...
>
> Julian Macassey <julian@n6are.com> writes:
>
>> On Sat, 24 Feb 2024 10:26:51 -0000, Brian Gaff <brian1gaff@gmail.com>
>> wrote:
>>
>>> Is it just so they don't show the muck, or is there something in the
>>> black
>>> that is needed to give the tyre the correct properties. After all for a
>>> while white wall tyres were all the rage.
>>>
>>
>> The black is from lamp black (Very finely divided pure carbon). It
>> serves several purposes. It toughens the rubber, it lowers the rolling
>> resistance, and provides UV resistance. It can be a substantial weight of
>> the
>> tyre.
>>
>> Lamp black is usually made from the incomplete combustion of hydro
>> carbons, often natural gas.
>
> But it is no longer necessary for hordes of urchins to go door to
> door, offering to wipe out the glass chimneys of maladjusted oil lamps
> with a soft swab and remit the swabs to industrial employers for
> processing into barrels of lamp black. Progress.
>
>
> --
> Mike Spencer Nova Scotia, Canada

On 27/02/2024 14:10, Brian Gaff wrote:
> Yes obviously, but where does it come from in this clean world we are
> supposedly moving toward? Brian
>

DPF recycling plants ?

On Tue, 27 Feb 2024 14:16:11 -0000
"Brian Gaff" <brian1gaff@gmail.com> wrote:

> So what is the black deposit you often get holding your hand above a
> candle,

Carbon from incomplete combustion of the hydrocarbons in the
candle.

--
Steve O'Hara-Smith
Odds and Ends at http://www.sohara.org/
For forms of government let fools contest
Whate're is best administered is best - Alexander Pope

On 27/02/2024 14:16, Brian Gaff wrote:
> So what is the black deposit you often get holding your hand above a candle,
> no far enough away to not burn it silly, but there used to be a kind of
> sooty substance deposited there even after just a few seconds. I can
> remember it from my childhood. Candles are interesting though as some of the
> wax from candles are hotter than others. I remember being told at school
> that candles used to be marked with black lines to act as basic clocks.
> Seems a bit imprecise if you ask me.
>
> Brian
>
Ah yes, I remember doing that. Your typical corner shop candle burned
about an inch an hour? AIR

Chris