How are RW's reset

[Guest]

I watched the sticky note video on the differences between pressed and burned discs. I understand how the laser burn marks act as the pits. Non-rewritables I can grasp, but how does the burned dye get replaced on RW's when they are altered,erased,etc.?

[ole-dude]

It’s my understanding that the Laser in the burner is turned on at a lower temp and ran over the entire surface of the RW media. This causes the material on the surface to be de-pitted and ready for the next burn, which uses the higher temperature.