Beijing Orient million cards, membership cards making factory [cheap], making membership cards provided by the Eastern million cards. We are Beijing Oriental one hundred million Smart Card Technology Co., Ltd. (www.dfykzk.com) located at: Beijing Daxing District, specializing in: membership cards, magnetic stripe cards, Gold, Silver, transparent card, IC card, pvc card, VIP system card company membership card embossed code Precautions: 1 convex code into large and small convex convex yards yards, membership card membership card companies design, the small convex code to the 13th typeface, large convex yards to No. 18 Font said. 2, do membership card design, code should be noted that the convex position, do not press the magnetic stripe, bar code reading technology and other location data is required. 3, convex code can be hot, hot silver, hot laser, you can not hot colors. 4, there is a general convex code number starting membership card manufacturers latest production, followed by the start of the convex code Shun changed. 5, the general membership card too convex digit code is not suitable, easily causing cards deformation, bending, generally less than 16 digits convex code is more appropriate. 6, small convex code about 3mm a character, the more convex code is 4mm big one character. 7, personalized convex convex code code than water production cycle is longer, is not suitable for mass production. 8, matte surface membership card embossed code is not suitable for hot color (gold foil, silver, laser). 9, membership card embossed code from the card edge must be at least 4-5mm. (Membership card to mark the position of the convex design code) Beijing-contact IC card production factory, production of IC card companies, common storage contactless IC card SEL model: SEL4428/4442 capacities are: 1K/256B, all data except for passwords In addition, can be read in any case, the password can be read out after the check correctly. All data bytes can be write-protected 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, then 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 be restored to their initial values . SEL4428IC card password error counter initial value of 8 low membership card making factory, 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.