How long would tumah remain on a seat after a women with niddah sat on it?

From what materials would chairs and tables be unable to convey it? Ceramic/carbon fiber/plastic/glass?

What about buses and cars? Synagogue cushioned seats?

Edit: What about those new modern ergonomic seats with nets as cushions?

  • Does Tumah ever expire? – Double AA Feb 23 at 20:15
  • 3
    How many questions are in this question? It would be easier to answer if there was only one question per post. – Mordechai Feb 23 at 20:38
  • I dont want to fill the main board... – Israel B. Feb 24 at 7:06
  • Please do, the more questions the merrier. I see 4 questions: 1. Does Tumah wear off or expire? 2. Are any materials unable to contract Tumah, regardless of their form? 3. Can a seat contract Tumah if it is attached to the ground? 4. Can the seat of a Car or Wagon contract Tumah? ASK AWAY! – Baby Seal Feb 25 at 19:18

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