Hiding Power Test Board is a glass board which is printed 16 white squares and 16 black squares. Every square size is 25mm×25mm. It is used to check the hiding power of paints. Operator brush some paint on it surface till can’t see white square and black square completely, then weight the used paint and divide the whole area（200cm2）, use g/cm2 to express this paint hiding power capacity. It is a easy and fast method to test hiding power of paints.