First, warm and cold summer production bags used cold color, giving a sense of cool, winter production bags used warm colors, give a sense of warmth.

Second, according to the characteristics of the product set light and dark degree of packaging bags, bright and high packaging bags feel lighter, bright and low packaging bags to give people feel heavier.

Third, the distance from the color of light and dark, cold and warm, vivid blur, contrast degree will give people different distance experience.

Fourth, taste sense different colors will give people different taste feelings, can choose different colors of packaging materials for the taste of food.