Re: [CR]Silk Tubular Maintenance


Date: Mon, 11 Jun 2007 00:10:32 -0400
From: gabriel l romeu <romeug@comcast.net>
To: Donald Gillies <gillies@cs.ubc.ca>
Subject: Re: [CR]Silk Tubular Maintenance
References: <200706110318.l5B3IB8B005036@cascade.cs.ubc.ca>
In-Reply-To: <200706110318.l5B3IB8B005036@cascade.cs.ubc.ca>
cc: classicrendezvous@bikelist.org

hey George, i was hoping to meet you at cirque...

I guess much of this has been gone over, but I will add my less than .02

cause i wrote it before i read the other excellent and informative replie s.

but anyways, careful with armour all. it has some chemical properties that will have a negative impact with polyvinyls and i would assume the makings of a tubular tire. In marine applications for polyvinyls, varnish coatings, fiberglass and such we use a product called 303 protect ant

http://www.303products.com/main.php?infopage=freesample

and i have extended the use with excellent results on butyl o rings on my furniture and auto interior/exterior application.

This is less of an endorsement of it's use on the tubulars then a cautionary word on the armour all application.

Also, sandwich bags and most other commonly available plastic bags will wreak havoc with the long term storage of fabrics and paper which should

be a consideration for your application. Light Impressions sells quite a quantity of different sized archival bags fairly cheap that are inert. I have used them for years for archiving prints (intaglio and photo). c ya, gabriel

Donald Gillies wrote:
> I believe that Ozone and UVB/UVB are the main things that will damage
> rubber products (including campagnolo gum-rubber hoods). For UVA and
> UVB, something like garden-variety drugstore sunscreen may do the job.
> Modern tires contain carbon black which is supposed to absorb the
> UVA/UVB and convert it to heat, before it can do much damage to the
> rubber. I guess you can think of carbon black as a pre-fabricated
> suntan.
>
> For Ozone, I think you need to think a little bit about how ozone
> attacks the rubber. Ozone is a powerful oxidizing agent, I believe it
> is an unstable molecule with 4 free electron sites in the S and P
> orbitals. So, you want a chemical barrier that bonds with ozone
> before it reaches and oxidizes your tire. Some modern automotive
> tires contain compounds built into the tires that are designed to
> leach out over time - BUT ONLY IF THE TIRES ARE RIDDEN, NOT IF THEY
> ARE STORED. Any persistent liquid cover for the surface of the tire
> might work. However, you want something that does not react with your
> rubber, and Armour-All is said to react with typical rubbers :
>
> http://www.6mt.net/forum/g35-coupe/1086-armour-all.html
>
> A third issue is that the rubber may leach out the oils that make it
> supple and long-lasting. This is because there is a gradient between
> the dry air and the oils in the rubber. Any material that covers the
> tire and moves this humidity gradient to an oil or liquid covering the
> tire, will leach the covering liquid, not the tire's precious oils.
>
> My approach is to store all rubber products in sealed plastic baggies
> until use. I bagged all of my products as soon as they were purchased.
> Any diffusion gradient will eventually stabilize as some of the oils
> leach into the bag and reach equilibrium with the oils in the tires.
>
> For products installed on a bike, like hoods or tires, perhaps this
> product would work :
>
> http://www.microfiber-products-online.com/menxtgetepr.html
>
> Disclaimer : I don't work for these guys and have never used the
> product, but it is said in the article above concerning Armor-All that
> Meguiar makes a much higher quality (and unfortunately, more
> expensive) product than Armor-All.
>

--
gabriel l romeu
back in chesterfield nj usa
± http://studiofurniture.com Ø http://journalphoto.org ±