Lead is also used in ceramic glazes and as a stabilizer in plastics. Lead was used extensively as a corrosion inhibitor and pigment in paints but concerns over its toxicity led to the CPSC in 1977 to ban the use of lead in paint for residential and public buildings.
The first digit assigned to all Visa cards is four, and the second through sixth numbers are connected to the financial institution. Then, either the seventh through 12th numbers, or the seventh through 15th, are the account number, while that final 13th or 16th digit is the check number.
Cards issued by Visa and Master Cards have 16 digits number. If the card starts with 4, its issued by Visa. If 5 then by Master Card. The 2nd through 6th digits are the issuer bank number. And the 7th-15th numbers are individual's account number. The 16th digit is known as the âcheck digit,â which is used to help determine whether or not the overall number is legitimate. Then, there is the 3 digit CVV code, which is at the back of the card.