Text objects do not use transparency
This check looks at the colour and overprint settings of images on a text layer and reports whether they have all been set up to use 100% opacity and the Normal blend mode.
As well as being set to use the [Black] swatch and set to overprint, images and text used on the text layer should not use transparency.
Live transparency is an onscreen effect that needs to be resolved before printing. When transparency is removed (often called ‘flattening’) the results can introduce unwanted white boxes or influence the CMY plates.
A drop shadow is an example of an effect that uses the Multiply blend mode and transparency. As such, drop shadows should not be used on the text layer. Neither should gradients, glows and Bevel and Emboss and Feather effects.
For the text layer all images and text are set to 100% opacity and Normal blend mode.
Note: Images and text any other layer including covers and jackets are not restricted in this way.