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This research analyzed the relevant practices in the color composition of packaging and its color psychology for soft drink and spirits products in the world‐renowned packaging design competitions. The packaging color characteristics of the two types of products were analyzed using a quantitative analysis‐based approach (using HSV color model), supplemented by qualitative analysis. The colors of 534 drink packages were analyzed quantitatively, and the three main components of soft drinks and spirits packaging were evaluated in terms of hue, saturation, and value. The color ranges and characteristics of soft drinks and spirits were summarized and compared. The results showed that the vast majority of both products used multi‐color packaging. Soft drink packaging is mostly colored with high value of red, orange, and yellow hue areas, while spirits packaging mostly uses low‐saturation colors. In addition, the average saturation (42.44%) and average value (78.18%) of the main color of soft drink packaging were higher than the average saturation (25.94%) and average value (57.55%) of spirits. Soft drink products are mostly packaged in white or warm colors to gain consumers' attention, while spirits are packaged in black to highlight the high quality and taste. This study shows that the color composition of soft drink and spirits packaging is clearly different. It also reflects that specific colors have a specific psychological meaning, thus causing people's psychological resonance and recognition, which has positive significance for further research on the influence of color psychology on product packaging. [ABSTRACT FROM AUTHOR]

Objective: To explore the feasibility and fluorescence characteristics of CFSE negative staining for in vivo cell imaging of super paramagnetic iron oxide nanoparticles (SPIO) phagocytosed by mouse mononuclear macrophage leukemia cells-RAW264.7., Methods: After labeled with SPIO, the RAW264.7 macrophages were stained with Prussian blue stain and CFSE fluorescence negative stain step by step. Furthermore, trypan blue staining was used to evaluate cell viability of cells which stained with CFSE. At last, laser scanning confocal microscope was used to measure SPIO in cells through CFSE fluorescence negative stain method., Results: SPIO within RAW264.7 macrophages showed blue in Prussian's blue staining, while showed negative area in CFSE negative staining. Good consistencies between Prussian's blue staining and CFSE negative staining were observed. In addition, RAW264.7 macrophages showed high viability after SPIO/CFSE dual-labeled method, proved by typan stain., Conclusion: The CFSE fluorescence negative staining may be used for detecting SPIO that phagocytosed by RAW264.7 macrophages and it is showed good consistency that confirmed one another when compared to classic Prussian' blue staining.