Beijing contactless IC card production factory, production of IC card companies, a common store contactless IC card SEL model: SEL4428/4442 capacities are: 1K/256B printing vip membership card, all data except the password, in any case can be is read out, the password can be read out after the check correctly. All data can be write-protected byte data write-protected after curing, can not be changed under any circumstances. Password error counter check the error once, then subtract 1. If the counter value is 0 Daxing do vip membership card, the entire card data is locked, just read out, can not write and can not continue to check or change the password; is not 0, you only need to check the correct time, the counter will revert to the initial value. SEL4428IC card password error counter initial value of 8, SEL4442 3. Temperature range: -35 ℃ -80 ℃, at least 100,000 erase, at least 10 years data retention. SLE4428 card can read the data without a password entire card, so pay attention to the design of content encryption, to prevent vandals identification data format. The whole card is not partitioned, the password has been able to verify the correct address to write or modify any of the data, so the design should pay attention to proper curing of data and the data content encryption, to prevent unintentional destruction of data or unauthorized alteration of data. After checking the correct password, which can be read out. Therefore, the design of the program to be able to prevent vandals using illegal interrupt program run, go directly to read the password method to steal passwords. Standard pvc cards manuscript production standards vip membership cards, many customers sent the manuscript most card companies are not standardized, following the introduction of pvc card production under specification manuscript. 1, Puka Finished Size: 85.5 * 54mm; Puka Design File Size: 88.5 * 56mm. 2, Puka finished cards close to 12 ° angle fillets. 3, Puka common stripe width of 12.7mm, magnetic stripe card edge from 4-5mm better. 4, finished card every few small convex code width of about 3mm, close to the 14th font size; finished card code every few large convex width of about 4mm, nearly 18 font size. 5, scratch film used size 6 * 18mm, 6 * 36mm, 6 * 55mm, special specifications must be ordered. 6, barcode highly uniform 13mm vip VIP membership card, for example 128 barcode, barcode reserved bit length = number of data bits * 6mm, Example 6 digits: 6 * 6mm = 36mm, barcode reserved bits is 13 * 36mm . These are some of the basic knowledge of pvc cards manuscript production, specifically some of the other requirements, please consult a professional card company designs vip membership cards, membership cards, Daxing do vip, Beijing Orient million cards card provided by the Eastern million cards. This information consists of: providing Beijing Orient million Smart Card Technology Co., Ltd. (www.dfykzk.com), we are business alliance member, the integrity of the whole network authentication provider. Feel free to contact us, Contact: Tang Jingli