The safest way to store information now a day is to make a CD (Compact Disc) of it. You can burn anything on to a CD – movies, music’s, speeches etc. You can make copies of it to give to others or sell. But it is not possible to make 1000’s of copies within a few days. For that you will have to depend on a bulk CD replication firm.Bulk CD replication is the method by which the music CD’s are produced in large quantities. Just like in paper printing press a master is made of the music or whatever information. In the case of CD’s and DVD’s this master is “glass master” because a glass disc, slightly larger than a CD is used for the purpose.Actually it is circular block of glass on which special chemical coating is applied. The information is then copied on to it. The copying is done in specially built class 100 (ISO 5) clean room. It is to avoid contamination of any kind of dust, hair, pollen or smoke, which will affect the performance of the CD’s made.This “glass master” is then used as a stamp to produce bulk CD replication. As in the case of printing press, the increase in number of posters or notices decreasing the price of each piece, here too, increase in number of CD’s will decrease its per piece cost of production. For example, if a bulk order for 1000 pieces will cost you 50p per piece an order for 10000 copies will only cost you less than 0.5 dollars.






