Replication is a physical production process where they are replicated in mass quantities by using a master copy as a source.

2. A couple of decades ago, the
technology behind CD (Compact Disc)
was first patented and then produced
jointly by Sony and Philips.

3. Undoubtedly, the CD was a great gift
to the users since its storage capacity
exceeded the capacity of personal
computer hard drives of those times.

4. It was originally built to store and play
sound recordings. However, soon it
was adopted for various other
formats, including, write-once,
rewritable, video CD and so on.

5. Even though nowadays the hard drive
space has overtaken CDs by hundreds
of times, it still has an amazing
demand.

6. Which brings us to fulfilling such high
demands of users by means of
production of CDs on a large scale
basis.

7. For example, distribution of movies
and music is being mainly done
through CDs or DVDs.

8. It requires production of hundreds of
thousands of CDs with the same files
in it, where copying of file and burning
them would take too much of
time. This is where CD Replication
technique comes into play.

9. CD Replication is a physical production
process where they are replicated in
mass quantities by using a master copy
as a source.
What is it?

10. Mostly people misunderstand CD
Replication with Duplication. CD
Duplication includes burning data and
it writes sequentially while replication
is different as the entire disc is written
in one physical stamping operation.

11. How is it made?
CD Replication method is quite
cost-effective as well as brisk and is
usually applied for production of
large quantities of discs.

12. Since a high setup cost is associated
with it, it may not be suitable for
smaller orders. Generally CD
duplication is done for smaller orders.

13. First the plastic blank part of the disc is
created using a hydraulic press where
granules of raw polycarbonate are fed
into the press. Later on a metallic
reflecting surface is applied.

14. The next part is preparing a glass
master which uses a high-powered
laser to create desired pits and lands.
The glass master becomes the positive
part of the CD surface.

15. The glass master is created from the
original master and it’s pressed against
a metal disc. It in effect punches tiny
pits on the metal surface.

16. This metal disc, also known as a die is
the negative part of the CD. This die is
sent to the press where the original
physical image is stamped at once on a
blank CD.

17. The CDs afterwards are spinned
rapidly and a small amount of lacquer
is applied in the middle of it which
spreads evenly.

18. Finally the stamper and the molded
discs are tested for accuracy and
quality check. If no defects are found
then the CD is ready to be printed and
packed.

19. Over the years the manufacturing
process has got simplified by a great
extent and the technology has evolved
immensely.

20. Using the similar technology and
introducing new ideas, DVDs were
developed which had 6 times more
storage capacity than a CD.

21. The Blu-Ray discs are an advanced
version of DVDs which provide an even
greater storage capacity.

22. Thank You
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