| |
.jpg) Dimension:160W*198D*56H(mm) Weight: 650g อุปกรณ์ล้างสนามแม่เหล็กแผ่นซีดี และอื่นๆ (หัวคอนเนคเตอร์ สายสัญญาณ ฯลฯ) รายละเอียดเพิ่มเติมคลิ๊กที่นี่ Why do optical discs, such as CD, become magnetized? First, it is thought that an iron ingredient contained in the printing ink of the label side of the disc is one of the causes of magnetizing discs. For example, iron oxide is used for red, yellow or brown ink, cobalt is used for blue or green ink and nickel is used for silver ink. These materials, iron, cobalt, nickel, are called ferromagnetic substances, and they are relatively easy to magnetize. Second, problems are caused by the use of aluminum used for the recording side of CD. Currently, the JIS (Japanese Industrial Standard) states that the purity of the aluminum used must be 99.0%. Read more...
|