Old black and white photos are wonderful. They show a time that was long ago. But when you add colour to a black and white photo. You bring them forward in time so to speak. Therefore they look real and they have more life to them. It is as though they were taken yesterday. It becomes an amazing transformation.
The process to do this colourizing magic is not all science. In fact most of it is down to artistic flair and skill. Once the original black and white image is restored and looking like new again, the re-colourizing process can begin. The process all takes place in Photoshop but the colours are painted in by hand using a 'digital brush'. The colours are all chosen by the artist too. We do not know from the black and white photo which shade of grey is which colour. So researching the period and other information including feedback from the client is all very important to the final result.
The photo restoration colourizing example below is a fine example how colour can really make a an big impact.