FREEZING PACKAGING FILM, FREEZING PACKAGING BAG, FROZEN FOOD PACKAGE AND METHOD OF EVALUATING STORAGE PROPERTIES OF FREEZING PACKAGING FILM

摘要

This transparent freezing packaging film is such that, when filled with a reagent as the contents, the reagent containing 0.14 mass% methylene blue and having an L* of 55-65, an a* of 3-9 and a b* of 45-55 in the L*a*b* color system, and stored frozen for 2 weeks at a temperature of -20°C, the color difference (ΔE) of the surface of the contents is less than or equal to 30.