Blue-white check pattern

The blue-white check pattern is a security feature used in banknotes, especially US currency. It consists of small blue and white squares arranged in a grid, creating a woven or checkerboard appearance. This pattern is designed to deter counterfeiting, as it’s difficult to replicate exactly with standard printing techniques. When held up to the light or viewed from different angles, the pattern often reveals additional security elements like microprinting or color shifts. Overall, it helps verify the authenticity of a banknote and protects against fake currency.