How to identify the quality of fruit protection bags

The biggest benefit of fruit bagging is to improve the appearance quality and reduce pesticide residues, and the improvement of appearance quality is mainly reflected in the smooth surface of the paper bag and the comprehensive coloring of fruit. For example, apple, without bagging the highest degree of coloring is 2/3, bagging after the coloring area can reach more than 99%. The improvement of appearance quality and the reduction of pesticide residue are the important conditions for fruits from all countries to enter the international market. Especially now the fruit category is relatively surplus, the high-quality fruits of various countries are also in the case of import and export, fruit bagging is a necessary supporting measure for the development of fruit industry. Then the next will be a brief introduction to how to distinguish the quality of fruit protection bags.

1. See the appearance

The appearance of the fruit bag must be smooth and smooth, all the bonding parts should be firm, the iron wire in the upper right corner is tight, the air hole at the bottom is obvious, and the bag mouth at the upper fruit handle should be neat. Under normal circumstances, the general color of the outer bag paper is earth yellow and white (of course, there are exceptions, such as shine-muscat grape is to use green fruit protection bag). Too green, too yellow or black, shiny bag paper quality is not reliable. The inner side of the outer bag paper is generally painted black, which is uniform and opaque (depending on the specific fruit crop).

2. With the hand touch

The outer bag paper feel should be thin and even, not too thick or too thin, soft and ductile paper. Pinch the paper bag with thumb and forefinger of both hands, longitudinal and transverse tear, the greater the force indicates that the paper toughness is good; On the contrary, paper toughness is poor, water deformation is difficult to recover. The paper may cling to the fruit surface after raining, causing sunburn, deformity and other problems. In addition, the feeling of crisp paper, or too soft paper, quality is not qualified. Paper brittle hard, poor air permeability; Too soft, insufficient tension, water penetration.

3. Soak in water

Under the same conditions, soak several fruit bags in water or spray water, compare the speed of wet water and the degree of deformation after water drying, whether the surface of the outer paper shows black spots. Such as large deformation, black speckled stains, wet water speed is fast, are unqualified paper bags.

4. Try bagging

With bagging method, the left hand holds the fruit bag, the right hand reaches into the inside of the fruit bag, and spreads it into a cylindrical shape. Check whether the air hole at the bottom of the bag is open. If the air hole is stuck or too many (more than three) or too large (more than 15 mm), do not use it. In addition, check whether the inner bag is cracked or incomplete.