CD-R and DVD-R are made from synthetic dyes which change colour/relectivity on exposure to laser light.
Different brand disks can be made from different synthetic dyes.
Cyanine, PhthaloCyanine, Metallized Azo, Advanced PhthaloCyanine, Formazan are the most common dyes.
I found that my CD32 preferred Formazan (Strong Green).
I would recommend getting some Taiyo Yuden CD-R's and see if they work.