On 04/25/2016 08:18 AM, Vladimir Savic wrote: > You are on the right track, but not quite there. Your paper color is the > whitest white you can get without using real white color. If you change > white to be a bit darker, you are essentially just adding more pigment on > background. Even if you choose to print on a black paper, you will again > just add more pigment on that black, thus making it more darker. > > To get an idea on how it COULD work for you, take any png image and import > it into Scribus' image frame. Define two custom spot colors: ExampleColor1 > and ExampleColor2 with arbitrary color values. Important is to just mark > those two as spot colors. Go back to editing object on canvas. Find out how > to add Image Effects. From there, choose Duotone effect and set it to use > your custom defined colors. >
Another way of thinking about this is that if you are going to be printing white on colored paper, you will need a quite opaque ink to make sure it covers the background and looks white. This is one of the roles of spot colors. Sometimes you want to have a spot color, like silver, that can't even be represented in the RGB colorspace. Greg
