The scanner had to be set to 150dpi resolution and the image saved as a JPEG. Then I opened the scanned image in photoshop and set the crop tool to the size of A5 paper, with a 150 pixels/inch resolution. Once this was done I cropped the image and adjusted the levels to increase contrast. Next, I opened a new Photoshop canvas at A3 size with a 150 pixels/inch resolution. Then I adjusted the hue four times by going to 'Image' then 'Adjust' and then funally 'Hue/Saturation.' Each time I changed the hue, I copied and pasted it onto the A3 canvas, putting them all together. Once all four were pasted, I saved the image as a JPEG and printed it out, so I could later cut them into A5 pieces and add them to my sample book.
Here is the finished result:
