Declining US dollar, inflation, increased transportation costs.
I'm not too sure about how much plastic is made from gas, all the plastic that I used at work (plastic extrusion) was oil sourced as far as I know.
Most of the DVD-R/DVD-RW dye companies are Japan based. How much of the dye in is made in china, I dont know, but IMO it would be at least some of the dye. Knowing Japanese companies though, at some of the dye would be japan-only production.
I cant find a list of the DVD-R dye producers, here is the CD-R list-
http://www.ccssinc.com/index.php?mai..._dye_explained