The Naked Scientists

The Naked Scientists Forum

Author Topic: Why does scraping one side of a ribbon make it curl that way?  (Read 1570 times)

Offline graham.d

  • Neilep Level Member
  • ******
  • Posts: 2208
    • View Profile
I noticed that coiled coloured foil or ribbon Xmas decorations are made by drawing the ribbon over one's thumbnail. They then will coil inwards and remain coiled. Does anyone know the mechanism here? Is it just bending over an edge repeatedly to stretch the outside or is it a more subtle structural change to the material?


 

Offline yor_on

  • Naked Science Forum GOD!
  • *******
  • Posts: 11999
  • Thanked: 4 times
  • (Ah, yes:) *a table is always good to hide under*
    • View Profile
Why does scraping one side of a ribbon make it curl that way?
« Reply #1 on: 27/12/2009 16:34:53 »
I believe Karen knows :)
 

The Naked Scientists Forum

Why does scraping one side of a ribbon make it curl that way?
« Reply #1 on: 27/12/2009 16:34:53 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums