Originally posted by Shannelle
Has anyone seen and used a ritek cd with yellow coating?
Hi !
The yellow coating is called Phthalocyanine (tha-lo-cy-a-neen)
ATIP: 97m 15s 17f
Disc Manufacturer: Ritek Co.
Reflective layer: Dye (Short strategy; e.g. Phthalocyanine )
Media type: CD-Recordable
Recording Speeds: min. unknown - max. unknown
nominal Capacity: 702.83MB (79m 59s 74f / LBA: 359849)
There also are Riteks with the other coating Cyanine ( light green, like Taiyo Yuden’s ) and ATIP :
ATIP: 97m 31s 01f
Disc Manufacturer: Ritek Co.
Reflective layer: Dye (Long strategy; e.g. Cyanine , Azo etc.)
Media type: CD-Recordable
Recording Speeds: min. unknown - max. unknown
nominal Capacity: 702.83MB (79m 59s 74f / LBA: 359849)
I’ve never heard of or seen Riteks with the light violet coating. Perhaps you mean those with the AZO dye, like Verbatims have ?
It would be great if you could determine the CDRs’ ATIP and post it here.
A couple of those utilities were mentioned here > [COLOR=indigo]Software to reveal manufacturer
OK, here’s some info about the dyes :[/COLOR]
Differences in dyes
All CD-R discs incorporate a photosensitive dye layer where your data is stored–it’s what gets “burned” when you write to the disc. This layer is where your data or music is stored in the form of “pits” which are oblong areas that are discolored by the writer. These pits are read by the player and ultimately transformed into the “1s” and “0s” that make up your digital information (music and data look the same to the reader). The accuracy of the stored information is directly affected by how this dye reacts. That’s why the dye is so important.
Phthalocyanine
Mitsui’s Patented Phthalocyanine (tha-lo-cy-a-neen) dye has several advantages over others: More responsive to the writing laser so cleaner, better defined pits are created. Longest lifetime of any photosensitive dye More transparent, contributing to Mitsui’s high reflectivity What does this mean for you? Cleaner pits means fewer errors. Higher reflectivity means better compatibility among readers. Longer life…300 years is, for all intents and purposes, forever. (estimated lifetime is 300 years for our gold CD-R and 100 years for our silver)
Cyanine
In general, cyanine dye is the standard; the Orange Book was written based on the original cyanine dye discs from Taiyo Yuden. Most CD-Recorders are optimized for cyanine dye. Cyanine discs are compatible with a wide range of laser powers. Phthalocyanine dye has performed better than cyanine dye in accelerated age testing, and may work better in higher speed recording (which requires higher laser powers.) However, all of these differences aside, it appears that IN MOST CASES, the two types of discs perform in essentially the same ways - it’s at the extremes and in the worst-case scenarios where these differences appear most marked. There are many factors besides the dye composition that determine the quality of a CD-R disc.
Black
Black CD-Rs use cyanine dye.
AZO
The NCC subsidiary of Mitsubishi developed a metallized azo, or metal chelate, dye that is a dark blue color. Use of a silver reflective layer provides an attractive background for a label and combines with the dye to produce an unmistakable blue color when viewed from the readout surface. Azo CD-R discs are also marketed by Verbatim.