Create your file using Riso colors or change them. The riso color swatches are as close as possible to the real thing on screen but will look brighter or different in person.

Make sure that every color has it's own layer. Set all the layers to multiply so you can
see how the colors will overlay when printed.

When you're done designing, convert your layers to the right black values so the printer
can apply the right amount of color.
*Do not change to grayscale or black and white, it will not give you the equivalent black values and colors can come out lighter than intended.

1.Set the background color in the color selector to black
2.Select the layer you want to convert and hit CTRL (or ⌘ Cmd) + Shift + Delete.
You should see the layer convert change to black or greys. Repeat for all layers.

Hide the margin and other color layers to export each color layer as a separate PDF file. Select save as pdf.
Name the files by project number if you have multiple projects, then color, then front or back if you're doing front and back printing. Ex: Pink.pdf or Projet3-yellow-front

Choose PDF Preset PDF/X-1a:2001
Uncheck preserve photoshop editing capabilities. Place files in different folders if you have
multiple projects