I duno if dis is out of topic, wana ask about tyres...

1) How do we keep and maintain the "blackness" of our tyre?
2) How do we re-blacken(new word ) our tyre after the color has faded?
3) Heard from a friend that cleaning tyres with normal car soap will make the
"blackness" fade off, izit true?

Thx in advance from any car detailing experts... and sorry if i was out of topic