How to make shaped CD-R?
The technology of making CD-R is quite different from making a CD-ROM. The reflective coating on a CD-R is relative thinner and weaker than that of CD-ROM. You can conduct a simple experiment to prove this. Find a scrapped CD-R and try to stick a piece of masking tape on the non data side. Quickly peel the masking tape off by pulling it with a strong uplift force. Chances are the coating will be torn and broken. What that means is that you cannot cut a CD-R to shape as in the case of cutting a CD-ROM. That said, there are still ways to make shaped CD-R, though the degree of freedom is somewhat limited. The most common way is to use CD-R with enough non-data area for cutting. For example, a CDR can be made with only 80mm data area and the area from 80mm to 120mm can be cut to create the desired shape.
The technology of making CD-R is quite different from making a CD-ROM. The reflective coating on a CD-R is relative thinner and weaker than that of CD-ROM. You can conduct a simple experiment to prove this. Find a scrapped CD-R and try to stick a piece of masking tape on the non data side. Quickly peel the masking tape off by pulling it with a strong uplift force. Chances are the coating will be torn and broken. What that means is that you cannot cut a CD-R to shape as in the case of cutting a CD-ROM. That said, there are still ways to make shaped CD-R, though the degree of freedom is somewhat limited. The most common way is to use CD-R with enough non-data area for cutting. For example, a CDR can be made with only 80mm data area and the area from 80mm to 120mm can be cut to create the desired shape.