Method of testing hiding power of coating

A method of testing the hiding power of a coating using a plurality of black-and-white hiding testing materials each having a black-and-white pattern, comprising:

• arranging the plurality of black-and-white hiding testing materials side by side paced substantially equal to each other;
• applying the coating to the plurality of black and white hiding testing materials, altering the number of times of the coating for each black-and-white hiding testing material such that film thickness values of the plurality of black-and-white hiding testing materials are different stepwise;
• curing the coating applied to the plurality of black-and-white hiding testing materials;
• and
• evaluating the black-and-white hiding power of the coating by comparing each of the plurality of black-and-white hiding testing materials with other of the plurality of black-and-white hiding testing materials
• wherein the coating includes:
• applying a uniform coating to at least one of the plurality of black-and-white hiding testing materials as an object to a thickness uniform in the plurality of black-and-white hiding testing materials having a before-curing film thickness value that has not reached a value corresponding to a target film thickness value, the before-curing film thickness value showing the thickness of the coating on the black-and-white hiding testing material before the curing;
• and
• excluding the black-and-white hiding testing material from an object of subsequent applying the uniform coating if the before-curing film thickness value of the black-and-white hiding testing material has reached the value corresponding to the target film thickness value, and
• the applying the uniform coating and the excluding are performed repeatedly until the before-curing film thickness value of each of the black-and-white hiding testing materials reaches the value corresponding to the target film thickness value.