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The following pages will show some information about color science.  Different Illuminants, the influence of optical brightening agent, color calculations and color systems will be described in easy words. The poster below can be downloaded as a PDF file by clicking on it. If you want to have a printed version, please send an e-mail to 此邮件地址受阻挡spam的自动程序保护，需要激活Javascript功能才能查阅。 to order a poster (60 cm x 42 cm) free of charge.