1. Raw material problem: The raw material of seaweed is laver, and different kinds of laver may affect the color of seaweed. For example, purple cabbage moss is red, seaweed or Nostoc flagelliforme is green. If different kinds of laver are used, the color of laver will be different.
2. Production technology: The production technology of seaweed will also affect its color. Generally speaking, normally processed seaweed is bright in color, green or dark green. If there are some problems during processing, such as too high temperature or too long baking time, the color of seaweed may become lighter.
3. Storage time: If the seaweed is stored for too long, its color may change. Because chlorophyll in algae will gradually decompose, the color of algae will become lighter.
Generally speaking, if you buy light-colored seaweed, you can look at the raw materials, production date and other information on the product packaging, and then judge whether there is a problem. If you have any questions about the products, it is recommended to consult the merchants or relevant institutions.