Matt Loughrey's My Colorful Past project bridges "the gap between history and art", using digital techniques to add colour to monochrome images. This week he turns his attention to a photo from the RTE Photographic Archive's Cashman Collection, showing Sir Hamar Greenwood (left), Irish Chief Secretary from 1920-1922, with friends at Dublin Zoo, Dublin in 1921. Greenwood and friends sit on fold-up chairs. A marquee is in the background.

"Outdoor scenes present a different set of challenges," says Loughrey.  "It's very time consuming but creatively rewarding. As you address one material and move on to the next, the puzzle begins to solve and details are revealed. In this case the majority of the work involved how the natural light fell on clothing in foreground as well as revealing the rust on the fold up chair legs. A lot of close up work here too, concentrating on each and every floral disc in each daisy!"