Disposable Kraft Paper Bag

Disposable Kraft Paper Bag Details: 

What is the difference between Kraft paper and ordinary kraft paper: 

1. It is difficult to distinguish with the naked eye in most cases, and it is necessary to use fluorescent lamps to illuminate and inspect the paper surface.

2. Food-grade kraft paper does not contain fluorescent substances, while ordinary kraft paper contains a small or large amount of fluorescent substances.

3. Fluorescent detection light, turn on the light and illuminate the surface of the kraft paper. If the color of the light does not turn blue-purple, it means that it is food-grade kraft paper. If there are blue-purple light spots on the surface, it means that the kraft paper contains fluorescent agents and may also be mixed with recycled pulp fibers. If the surface of the kraft paper illuminated by the light is blue-purple, it means that the paper contains fluorescent agents or recycled kraft paper made of recycled pulp. White kraft paper usually has a higher chance of containing fluorescence, and food-grade white kraft paper is light yellow and white.

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