Wuxi Highness Technology Co., Ltd

First, the use of excessive excess, because the strength of the yellow light on the fabric is limited, so offset the yellow (the main wavelength of 570nm or so) required by the fluorescent whitening agent to absorb ultraviolet light and the yellow light color - - Blue-violet light is also limited.

 

    When the concentration of the brightener increases to a certain appropriate concentration, the intensity of the blue-violet light is exactly the same as that of the yellow light on the fabric, and the whitening effect is the best, and the highest whiteness value is obtained. At this time the brightener concentration is the fluorescent whitening agent, but if the amount of brightener exceeds the yellowing point, the absorption of blue-violet light intensity on the fabric is greater than the intensity of the yellow light on the fabric, the brightener is reflected Of the blue violet light was very obvious, while the brightener of the various composition of the different groups, presented by different tones (such as glaubera, red light blue, etc.) is also more obvious to show the combined effect of the above factors , The fabric of the gray tone increased, its role with the decline in whiteness. In addition, different brighteners have yellowing point that is the best concentration, and no varieties of brightener yellowing different points.

 

Second, the fluorescent whitening agent whitening only optical brightening complementary color, and can not replace the chemical bleaching, so do the fluorescent whitening before the need for processing of pre-processing varieties, or the use of pre-treatment whitening a bath processing Fabric.

 

Third, the bleached fabric when stored properly, when the place where there are acid or chlorine and other gases, will make the fabric yellowing and fabric spots from the point of expansion into the block, into the surface and the infiltration of the fabric up and down layers.

 

Fourth, the water impure, high hardness or contain heavy metal ions, affecting the whitening effect.