What is the black stone of fried chestnuts

The black stone of fried chestnuts is quartz sand, in fact, the essence of quartz sand is not black, but white, stir-fried for a long time, stained with oil and sugar will become black.

Into the fall, many people on the street to see a lot of business fried chestnuts for sale, but they found that these business fried chestnuts inside the black stone, in fact, these black stones is what material? The following let us go together to understand it.

Chestnut head is large, it is difficult to fry alone heat evenly, often resulting in the phenomenon of uneven ripening of chestnuts, if the use of quartz sand will be able to play a role in the role of thermostat, so that the chestnuts are evenly heated, and can be fried at the same time ripe.

Quartz sand should be selected before use, generally to select the head size is uniform, and the corners are more rounded for the best.

The color of the quartz sand is white at first, but in the later frying process, to add sugar products to chestnuts, under the high temperature, the sugar will become caramel, quartz sand will slowly become black.

Raw chestnut fruit surface will have a layer of fluff, in the high-temperature frying, quartz sand will be stained with these fluff, with the temperature of the higher and higher, on the caramel melted together, these black stones after a period of time after the frying, to be replaced.

Some unscrupulous merchants, in order to pursue the appearance of chestnuts beautiful, looks good, will be in the process of frying, add paraffin, paraffin, although it will make chestnuts look more attractive, but the human health will be harmful.