Originally Posted by
Manfred M
George - all of the functionality in Lightroom is arranged in something that Adobe refers to as Modules. There is a Library Module, a Develop Module, a Print Module, etc. All of the printing commands are found in the Lightroom Print Module.
When we are doing prints of photographs we have an additional level of control that one does not find with other types of printing. We are trying to get optimal results with regard to how the colours reproduce. The photo editing software lets us work with colour profile data (ICC profiles) that the paper manufacturer has prepared using a photospectometer that is very specific to the printer ink set and photo paper characteristics. This is the first set of information that we set inside the editing software. Dave uses Lightroom and I use Photoshop, so our processes are slightly different.
Having done that, we have to disable the colour management module of the printer driver. The printer also has some default data, but in general this is not as good as what we get with the ICC profiles. The printer manufacturer also only has the data for the paper that they sell, so if we want to use a third party paper manufacturer, this presents issues when using the built-in paper profiles.
The printer driver also has to understand things like paper thickness so that it can determine the proper position of the print head and the paper characteristics like drying time so that the ink does not smear. These settings can only be made with the printer driver software, hence the two step process.