On Fri, 12 Jan 2018 00:15:07 -0500, Paul wrote:

Optical media uses pits. Although there's going to be
a difference between pressed and burned media.

If you see pits and lands, it's commercially pressed, typically from a
glass master.

If you see a dye layer, it's burnable in a consumer level burner.

Ne'er the twain shall meet. Commercially pressed media don't have a dye
layer, and burnable media don't have pits and lands.

--

Char Jackson