07 In Photoshop, create a new file. This is where you’ll choose the size of your print. It’s always cheaper to print in standard sizes, so I’ve gone for A4 size and 300dpi. Your artwork should be set up as separate greyscale files – one for each colour layer – similar to the way that art is prepared for screenprinting. There’s no need to incorporate halftones in artwork files, just use tones of grey and the Risograph printer will create a halftone on the master automatically.
08 Paste the vector file into your Photoshop document as a Smart Object so that you can adjust the illustration to the paper size. Remember that Risograph duplicators can’t print full bleed. Allow for a border of 1cm on A3 or A4 prints.
09 When placed, lock that layer and select a new layer. We will now start colouring the artwork. Choose a new layer for each colour, select the Lasso tool and start creating shapes for your colours.
10 I used the Lasso tool in Photoshop to create multiple shapes that I then filled with the colour of my choice. When making artwork that has a line or stroke around some solid colour on another layer, don’t leave any white gaps in the lower layers, because these will show through if it’s somehow misregistered – make the shape in the centre of the strokes.
11 Fill the shape with colour and choose 100% black. Do the same for each colour layer. If you decrease the opacity on that layer, you will see the artwork, but all layers should be 100% black when they’re sent to print. Tones of grey should be created, using registration as a spot colour and by varying the tone with the colour slider accordingly. When colours are overprinted, new colours will appear – in this case, yellow and blue will create green.
12 Save the file as three separate documents – one for each colour – setting them as greyscale, 300dpi and in TIFF format. You’ll have to deselect the eye icon on all layers other than the colour chosen, and flatten the image. This image shows the blue colour file.
13 All three files are now saved separately and registration shouldn’t be a problem. If you want, you could add your signature or the date – I’ve opted for an Uglylogo ‘badge’ in the blue layer. Now all you need to do is send the files to the printers and wait for the prints to arrive. Your first glance at the finished artwork and its colours is priceless.