Workers removing tea from a roller, prior to drying, Ceylon (Sri Lanka), January 1945. 'Nearly 20 hours after the leaf has been spread on the tats it is ready for rolling. This proces starts a fermentation, which results eventually in the creation of a dark coppery coloured product, indicating that the tea is ready for drying.' Photograph by Reuben Saidman.
© Daily Herald Archive / National Science & Media Museum / Science & Society Picture Library