Looking Down On People Since 1903 Cat Vintage Retro Shirt

tháng 9 18, 2020

To be fair, most countries already know this. It's a problem stemming from chasing profits above all else, and mainly a US problem. Other countries recognize their citizens and other residents as people rather than as cogs in the machine. Early automobile tires were made of pure natural rubber with various chemicals mixed into the tread compounds to make them wear better. The best of these was zinc oxide, a pure white substance that increased traction and also made the entire tire white. However, the white rubber did not offer sufficient endurance, so carbon black was added to the rubber to greatly increase tread life. Using carbon black only in the tread produced tires with inner and outer sidewalls of white rubber. Later, entirely black tires became available, the still extant white sidewalls being covered with a somewhat thin, black colored layer of rubber. It's worth pointing out that this is no longer true and standard tires these days are made of 100% carbon doped rubber, unless you specifically shop around for true whitewalls. That article you linked is talking about an era where white (zinc oxide doped) rubber was still used as it was cheaper but the tires were covered in black rubber as the black rubber was seen as a premium product compared to the white.

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