1. Look at the package. The patterns and characters printed on the product packaging should be clear, and the product name, factory name, production date and batch number should be indicated; Then look at the product description. Whether it is canned milk powder or bagged milk powder, there will be necessary words on its packaging, such as formula, implementation standard, applicable object, eating method and so on.
2. Check the production date and shelf life of milk powder. According to this, it can be judged whether it is within the safe eating period. Generally speaking, it is better to eat milk powder within three months from the factory, and it is best to eat and buy it now.
3. Look at the color of milk powder. Normal milk powder is white, slightly yellow, and it is best to have the same color; If the color is dark or burnt yellow or grayish white.
Step 4 squeeze. Packaging of milk powder in extruded bags. If there is air leakage, powder leakage or no gas in the bag at all, it means that there are quality hidden dangers in the bagged milk powder. Canned milk powder has good sealing performance and can effectively inhibit the growth of various bacteria.
5. shake (pinch). Canned milk powder can shake the tank, and the transparent film on the top cover can be used to observe whether the milk powder is caked. Bagged milk powder can be squeezed directly outside the package, and it should feel soft, smooth and flowing with a slight squeak.
6. Open the package and smell it. Normal milk powder has obvious milk flavor. Not suitable for eating with sour taste, astringent taste and bitter taste.
7. adjust. The bought milk powder can be blended and tested. The solubility of milk powder can be known by mixing milk powder with water. The method is to put a spoonful of milk powder into a glass, first stir it with less boiling water, then add more water to stir it evenly, and let it stand for five minutes. Water and milk powder dissolved together without precipitation, indicating that the quality of milk powder is normal.