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Tsinghua Tongfang’s archive-grade CD-ROM is specially designed and produced to ensure the long-term and reliable preservation of various important electronic documents, including archives. Various technical indicators comply with DA/T38-2008 "Technical Requirements and Application Specifications for Electronic Document Archiving Optical Discs". It is currently the only “Optical Disc Protection Technology jointly established by the Archives Science and Technology Research Institute of the National Archives Administration and the National Optical Disc Engineering Research Center Joint laboratory”certified and tested CD products.
Compared with magnetic disks, magnetic tapes, and flash memory record carriers, the use of optical disks to record and store archived data has many advantages in terms of safety, durability, energy saving, environmental protection, and cost maintenance. The national archives industry standard DA/T38-2008 clearly stipulates that when electronic files are archived using optical discs, archive-level optical discs should be used. Tsinghua Tongfang''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s archive-grade optical discs are recordable optical discs with durability that meet specific requirements. Various technologies are superior to industrial standards. The archive life is greater than 50 years, and the physical storage life is greater than 100 years. It is an ideal choice for long-term storage of electronic files.![](https://img.alicdn.com/imgextra/i3/102638448/TB2DtcRdQKWBuNjy1zjXXcOypXa_!!102638448.jpg)
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Product performance
In order to ensure the high-quality quality and batch consistency of archive-level optical discs, the DA/T38-2008 standard requires:
◆ The brand or supplier of file-level optical disc raw materials shall not be changed at will;
◆ The production process of archive-level optical discs must be stable, and process parameters must not be changed at will;
◆ Polycarbonate produced from archive-level CDs(PC)Plastics shall not use recycled materials;
◆ The use of ink, protective glue and adhesive glue must pass the weathering test of the disc;
◆ After the injection molding machine is started or the process parameters are adjusted, the first 50 discs are not used for archive-level discs;
◆ The terminal online detection must have a hierarchical screening function, so that the production line can distinguish archive-level optical discs from other optical discs;
◆ The printing pattern on the label surface of the file-level CD must have a special logo pattern;
◆ The production date, batch and other characters or bar codes must be marked on the file-level CD;
◆ File-level optical discs must undergo strict quality inspection before the product leaves the factory.
Professional manufacturer
Beijing Tongfang Optical Disk Co., Ltd. was established in 1998. The main sponsors are Tsinghua University, Tongfang Co., Ltd., China Audiovisual Association, Beijing Institute of Graphic Communication, and Beijing Film Academy. Since 1999, Beijing Tongfang Optical Disc Co., Ltd. has taken the lead in the promotion and application of high-quality CD-recording products in China, creating the first domestic optical disc brand “Tsinghua Tongfang”, leading the Chinese optical disc industry Rapid development.
Tsinghua Tongfang''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s optical disc products are designed and produced from the user''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s standpoint, and are the first to introduce a system to classify optical disc products by quality, and are the first to mark the storage life of different grades on the product packaging.
Strictly implement industry standards
Archival-grade optical discs refer to professionally burned optical discs for long-term archiving and preservation of important electronic documents that meet specific requirements for durability, various technical indicators are better than industrial standards, batch consistency, and archive life greater than 20 years. As a special industry disc different from ordinary optical discs, the DA/T38-2008 standard has strict requirements on the batch consistency of archive-level optical discs.
The difference between archive CD and other CD products
Pay attention to the “storability” of burned data instead of “easy to record”, so its quality requirements are more stringent than ordinary optical discs;
The product manufacturer must be registered in Mainland China, can be responsible for product quality, and have traceability;
The product has a batch inspection report issued by a third-party independent authority;
The application of archival discs is a continuous inspection process that is equal to the life of the data in it.
Specifications BD-R
Capacity 25G
Level file level
Product packaging single piece box
Executive standard DA/T38-2008
Shelf life Archive life is more than 20 years
Quality Assurance With CD-ROM protection technology joint experiment test report
Product Supervisor Joint Laboratory of Disc Protection Technology