Difference between ordinary white kraft paper and food-grade white kraft paper chocolate box

Difference between ordinary white kraft paper and food-grade white kraft paper chocolate box
Kraft paper has been widely used in various food packaging dates box, but because the fluorescent content of ordinary white kraft paper is usually several times higher than the standard, only food-grade white kraft paper can be used in food packaging. So, what is the difference between the two?
Distinguishing standard I: whiteness
Only a small amount of bleach is added to the food grade kraft paper. The whiteness is low and the color looks a little yellow. Ordinary white cow paper is added with a large amount of bleach and has a high whiteness.
Distinguishing standard II: ash control cake box
Food grade white kraft paper has strict control standards, and all indicators are allocated according to food grade requirements. Therefore, the ash content of food grade white kraft paper is controlled at a very low level, while the ash content of ordinary grade white kraft paper is high, in order to reduce costs.
Distinguishing standard III: test report
According to the requirements of food-grade packaging materials in China, food-grade white kraft paper must pass QS inspection, while ordinary grade is not required.
Differentiation standard IV: price
Although the price is not very different, it is also an important reference value. Food grade white kraft paper is more expensive than ordinary grade kraft paper.