US Patent 7328958 Error information acquiring method and print controlling method

When it has become necessary to reset color adjusting ID for the printer 20 because of the replacement of component parts or other causes, even in an environment where the printing condition that had been adopted for setting the ID in the past cannot be recreated, it is easy to calculate the ID of the equivalent value as those that would have been calculated if the printing condition that had been adopted for setting the ID in the past can be made available by using the color component conversion function. As a result, it will be no longer necessary to maintain materials and equipment in a good and unified state in the production site of products or at places where after-sales services are rendered.