Here are some limited test results with an Asus drive and limited numerical precision and by force the drive to read with 10000rpm. (sorry but the computer i am using now have no chinese input methods)

That's 5 Color (blue) (16X generation TY) (80min) C1 average ~0

Ricoh 1-12X by Ritek (74min) C1 ~ 1

Mitsui 80min (the new print version) C1 ~1 (but seems to be better than Ricoh with more 0s)

(the above are burned with a Plextor 121032A)

A Green print Ritek with S dye (but this disc is shorter, with only 64min worth of data) C1 ~ 1

A CMC made Yamaha KHS 20X silver have C1~9

A Grace 2002 Ritek Kdye c1 ~ 294

(above by liteon 32123s at max write speed for each media)

Prodisc smartbuy 4-12x cdrw c1~ 125 (sample 1) c1~18 (sample 2)



Liteon made by Plasmon 4-10x cdrw c1~ 16

Infodisc made 2nd print 1~4X CDRW c1~14

TDK made by mitsubishi in Sg. cdrw c1~ 29

5-Star made by Prodisc with Mitsui dye c1~ 5

Ritek made JS dye c1 ~ 1

(these are burned with the Asus 3212A of mine, HS CDRWs at 12X, low speed CDRW at 4X and CDRs at 12X)


As a side note: lower the read speed will give a lower c1 count in my case.