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Macclesfield, United Kingdom

Dawson T.L.,Heron Lea
Coloration Technology | Year: 2010

Nature offers a range of colour displays which are relatively short-lived and which were for many centuries little understood. Today we can explain most which arise from diffraction and reflection effects on rays of sunlight, various atmospheric ionisation phenomena and many colour effects resulting from biochemical reactions, although less is understood about some of the strange psychedelic patterns and colours which our brains can sometimes produce. The practical purposes to which certain fluorescent, thermochromic and photochromic dyes can be put, including their presently limited textile applications, are illustrated. © 2010 The Author. Journal compilation © 2010 Society of Dyers and Colourists.

Dawson T.L.,Heron Lea
Coloration Technology | Year: 2010

This review presents a brief history of the development of light sources over the centuries to provide one of the human race's basic needs - light. Recent moves in Europe to encourage the adoption of compact fluorescent lamps as more energy-efficient replacements for incandescent lights, despite certain drawbacks, are described. Rapid strides are now being made in the development of solid-state 'white' lights which are already sufficiently durable and efficient to warrant adoption for both domestic and public lighting purposes. Their basic construction and comparative performance, properties and uses are fully described, together with the many ideas for improving their brightness and durability still further. Solid-state devices offer additional savings compared with those which should be achieved under the EU's targeted replacement of incandescent lights by 2012, and later one can expect such devices to compete with high-pressure sodium luminaires for street lighting. © 2010 The Authors. Journal compilation © 2010 Society of Dyers and Colourists.

Dawson T.,Heron Lea
Coloration Technology | Year: 2012

Many of the principles of the relatively new science of Green Chemistry, which aims to use resources efficiently and minimise waste, are applicable in the field of textiles. Improving product quantity and reducing environmental impact in the production and subsequent coloration of textile fibres is a realistic goal. Public interest in organically produced natural fibres has followed on from that in organically grown food, although the market for organic fibres is still relatively small. In recent years, fibre manufacturers have played their part in introducing a number of more ecologically regenerated cellulosic fibres, as well as new totally synthetic polymer fibres based on renewable raw materials. The methods that can be adopted aimed at reducing the environmental impact of fibre, dye manufacture and subsequent coloration processes, are described with particular reference to these newer fibres. © 2011 The Author. Journal compilation © 2011 Society of Dyers and Colourists.

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