If ignored when it should be applied, the printer will face the impossible task of registering all image components and the page will look horrible, perhaps turning a clients promotion into a failure. Even subconsciously, the reader will ignore much of the advertised information on an ugly cheap advertisement and move on to other pages. This also applies to black text. If not corrected the colour plates will contain holes where ever the black will print. On the left you can view a simple scenario where this has occurred and unless trapping has been applied, the printing machine can only print every sheet accurately to a tolerance of perhaps a few hundredths of an inch leaving ugly gaps.
Exercises Try the following tasks using a black and white printer to output the results.
If extra colour plates print then you have a problem and should repeat the tasks. These steps will become second nature and eventually take little extra time. As many Drawing pages contain hundreds and sometimes thousands of objects, do not think you will be able to set object colours accurately after most of the job is finished, as we can with simple practice objects. Colour the Outline with solid Pantone Spot Colour 171. On each box type your first name in large text that covers the boxes from left to right.