http://www.datadisc.com/customer_support/technical_tips/ CD & DVD Duplication for Audio, Video and Data applications with premier CD & DVD Packaging options at Fast Turn Speeds with no minumum featuring Your Artwork... All of this from dataDisc, Inc - the leader in CD/DVD Duplication Technology en http://www.datadisc.com/customer_support/technical_tips/dual_layer_dvdr.php A standard DVDR contains about 4.7GB. The Dual layer DVDR have a capacity of 8.5GB, not quite twice. A dual layer DVDR is actually a DVD with two optical layers on the bottom of the disc rather than the normal one layer. You can't see the difference because the layers are determined by focusing the laser at different depths inside the dye. http://www.datadisc.com/customer_support/technical_tips/cd_replication_versus_cd_duplication.php CD/DVD Duplication in it's purest definition means to copy discs. Actually, there are two different ways to make copies of a disc, Replication and Duplication. http://www.datadisc.com/customer_support/technical_tips/packet_written_discs_as_masters.php Have you ever had a service bureau or a replication plant tell you that the master that you want them to duplicate is no good? You probably thought they were just trying to "rip you off." Actually, they are trying to save you time and money. http://www.datadisc.com/customer_support/technical_tips/process_versus_spot_printing.php Process colors are reproduced by printing overlapping dots (halftone screens) of cyan (light blue), magenta (dark pink), and yellow inks (CMY) to simulate a large number of different colors. Since CMY inks are translucent, they absorb some colors and reflect others. http://www.datadisc.com/customer_support/technical_tips/thinking_of_doing_a_dvd_which_one.php This is the movie that you buy at WalMart on DVD. These come in several formats but for the most part, they will all play in the set-top or computer DVD player. Normally, replication runs for DVDs have a minimum quantity of 1,000 to 2,500 pieces. What about smaller runs? There are DVD recordable discs on the market but this is where you need to make an informed choice as to the standard to employ. http://www.datadisc.com/customer_support/technical_tips/how_much_can_you_fit_on_that_disc.php If you've been burning your own CDs for a while now you've seen some changes in capacity. The first commercially available CDRs were 550 Mb. Then came the 650 Mb discs and in the past year or so, 700 Mb. All these discs met the ISO standard for size. They all are 120 mm in diameter (4.72 inches). http://www.datadisc.com/customer_support/technical_tips/write_side_wrong_side_which_side_is_up.php While many of you readers are still using CDR discs that are labeled with a distributor or manufacturer's name silk screened on them, some of you know that you can get discs that have no silk screen on them whatsoever. http://www.datadisc.com/customer_support/technical_tips/x_your_speed.php 2x, 8x, 24x, 40x, what's all this about anyway. Well it's quite simple actually. The first CDs were audio discs. The standard playback speed of the audio CD was considered the normal or 1 times speed (1x). The first recorders wrote at the same speed as audio playback or 1x. http://www.datadisc.com/customer_support/technical_tips/your_duplication_project_schedule.php Are you about to do your first CD/DVD project or maybe your first big one? Unless you have a reasonable, realistic schedule, you won't make it without paying some stiff "rush" fees. There are a number of things that will affect your schedule. Lets look at some and at the same time you'll begin to get a sense of a proper sequence for your project. http://www.datadisc.com/customer_support/technical_tips/how_to_print_a_disc.php Back in the 80's and 90's (the old century), serious label printing of CDs & DVDs was done almost exclusively by screen printing. Today, there are several methods of printing discs, some of which you may not even be aware of but they exist. Let's take a look.