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afterdawn.com > forums > dvd±r discussion > dvd±r for newbies > difference between dvd -+r and a store bought dvd
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difference between dvd -+r and a store bought dvd
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scampo77
Suspended due to non-functional email address
_ 		5. February 2010 @ 15:41 _ Link to this message    Send private message to this user   
what is the difference between a store bought movie disc and one you make at home?

what is the difference the way these read or last? the certainly look diffrent on the back

is it possible to do the same method at home as the commercially produced cd/dvds are made?
[ + quote]
gurnard
Senior Member
_ 		5. February 2010 @ 16:12 _ Link to this message    Send private message to this user   
hi :)

Quote:
what is the difference between a store bought movie disc and one you make at home?
store bought are pressed...home made are burnt by a laser

Quote:
what is the difference the way these read or last? the certainly look diffrent on the back
store bought read better/last longer (tolerate more abuse)

Quote:
is it possible to do the same method at home as the commercially produced cd/dvds are made?
only if you have several 10s of 1000s of £/$ to spare


[ + quote]

gif by ireland

we cant help if you wont help yourself
JoeRyan
Senior Member
_ 		5. February 2010 @ 17:02 _ Link to this message    Send private message to this user   
The binary code on optical media is written as either light bouncing back to a sensor or light being dispersed and missed by the sensor. Store-bought movie discs create the difference by having microscopic pit molded into the plastic so that the laser light changes when it falls over the edge of a pit. Recordable DVDs mimic that behaviour by having dark marks either "burned" into a photo-sensitive dye (DVD-R/+R) or made my melting a semi-metal alloy (DVD-/+RW/-RAM.)

Dyes and rewritable alloys are less stable than polycarbonate plastic, so molded DVDs are far more likely to last longer under the same conditions.
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afterdawn.com > forums > dvd±r discussion > dvd±r for newbies > difference between dvd -+r and a store bought dvd
 

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