In the mid-1970s, Lucienne Day began designing 'Silk Mosaics'. She enjoyed the design challenge of working within strictly defined parameters (the silk sections always based on a 1cm square) and the use of colour contrast. The designs were made up by a small team of skilled seamstresses. Although reminiscent of some of her geometric repeating patterns for textiles of the 1960s such as ‘Causeway’, the silk mosaics were one-off works of art, designed to hang on the wall. Because of her knowledge and experience of interiors, many were made for specific sites however, such as ‘Aspects of the Sun’, an ambitious work for John Lewis department store in Kingston-upon-Thames.