Showing posts with label cold. Show all posts
Showing posts with label cold. Show all posts

Saturday, 22 October 2011

Erasable gel ink pen (video)

After erasure, the ink can be made to re-appear by exposure to very low temperatures (approximately -14°F, -25°C).  Invisible ink?

Inexpensive too.

Friday, 7 October 2011

Sideways winter testing (video)


Arjeplog in Sweden has temperatures below freezing between October & May, so auto makers from around the world arrive every winter to test ABS (Antilock Braking System), traction control & ESP (Electronic Stability control Programme).