Why blue Glove in food factories

Because there is no blue colored food in the nature. Blue color can easily determined in the case of contamination inside of the product/process.

what about blueberry? is not it blue?

Hi Honour; Blueberry is not actually blue. As you can see from the attached picture blueberry has navy blue color around of it and when you mash it,it becames purple !

blueberry557×555 272 KB

The blueberry juice color depends on the pH of the medium. In acid medium it is more red and in basic medium it is more blue. You can test it by neutralizing the juice (which is normally acid) with baking soda.

Thank you very much for your information @johnfound

think it should be phosphorus orange

There is still no specific legislation on the use of Blue-colored gloves in the food industry, but for a Good Production rule, blue-colored gloves are preferred because Blue is the least present in food. Some factories have spectrograms for detecting such color objects on the production lines.