UNIT THREE PACKAGE PRINTING AND ECORATING 第三单元包装印刷 Lesson9coor颜色 ● Introduction ● Color Perception ● Color Terminology ● Viewing ColorUNIT THREE PACKAGE PRINTING AND ECORATING 第三单元 包装印刷 Lesson 9 Color 颜色 ⚫ Introduction ⚫ Color Perception ⚫ Color Terminology ⚫ Viewing Color