The information about minimum dot indicates what is the size of the minimum printing dot that appears on the plate.
This size is normally expressed in microns (µm), or, less commonly, as a percentage of a given linescreen, and it is set as a threshold in plate imaging to obtain such size on the finished plate.
This setting is defined during imaging and platemaking procedures in order to ensure that there is no dot having smaller dimensions on the plate that goes on press.
This is important because it ensures that the smallest dots on the plate will not occur into dipping problems with the anilox.
Note that the minimum dot refers to the plate characteristics, while it does not refer to the minimum printed dot that will be a result of this minimum dot, inked and impressed onto substrate.
