Rat : Yes, the Cds don’t play at all. Nothing happen when put into a player. I don’t have these CD with me anymore, But I’ll suggest my partner to check his defective CDs with the CD QC…
Justin : Thank you for the advice !
Thomas : These plants are fair and we are used to work with them. This is the first time we have an issue with them. So I don’t think they would duplicate CDs instead of press them. It’s just a process error that must be resolved. 
I’m indeed reassured to know that I made no mistake in the process. My partner will stop working with them until they prove they have identified the issue and have solved it.
Thanks to all of you for your care & your advice, it really helps me !
R.