1, carefully dyed raisins, it is precisely because of the high market value of black raisins that some black-hearted businesses will color raisins by steaming, and such raisins are very easy to fade. When buying black raisins, we can grab a handful of black raisins with our hands, then hold the palm of our hand and open it half a minute later. If we find black on the palm of our hand, it means that it is a raisin dyed black.

2. According to the color selection, the high-quality black raisins are very beautiful in color, and the overall appearance is dark purple, while the inferior black raisins are particularly dark in color and have no color sense.

3. According to the dry humidity, put your hand into the pile of black raisins. If black raisins feel sticky, it means that the humidity of black raisins is too high. Such black raisins are not only resistant to storage, but also cost-effective.

4, smell, dyed black raisins will smell a particularly strong chemical smell, while pure natural black raisins will only smell the clear fragrance of grapes.

5, according to the size of the selection, carefully observe the size of black raisin particles, good quality black raisins are generally made of big black grapes, so its size is relatively large.

6, taste the taste, pick up a black raisin and put it in your mouth, taste the taste of black raisins, if you think the taste of black raisins is very exciting, then don't buy it.