如今，好多做防水面料的厂家都有个疑问：做过防水之后面料颜色都会加深或者说是有黄变现象。针对这一现象，我们通过大量的实验数据得知（以无氟LZ-XR88为例）：
处理工艺是浸轧-烘干-焙烘（在做防水处理前确保面料表面的洁净程度，即不含杂质等）。
On polyester, when the dosage is 10g/l, it is waterproof to level 5. After being washed 10 times, it still has excellent waterproofing effect, which is waterproof level 4; when the dosage is increased to 20g/l, it can withstand 20 times of washing; </p
在尼龙上，当用量在15g/l时，初始防水五级，水洗10次后仍可高达四级；当用量提升至30g/l时，可以做到耐水洗20次。
无论是涤纶布还是尼龙布，当用量超过40g/l时，会比较容易产生黄变� �至于为什么会这样呢� We know from relevant information and experimental data: LZ-XR88 is fluorine-free between cationic and non-ionic. There is no need to add acid to adjust the pH in the solution for waterproofing treatment. Polyester, nylon and other chemical fibers, based on their own The amount of charge, if the potential in the solution is not controlled, will affect the color of the dye (especially dark colors), so why is the discoloration or yellowing of dark-colored fabrics more serious when they are waterproofed? �</p
由此可以说明，在做防水处理时并不是浓度越高越好的，当浓度达到饱和时，效果适得其反；所以控制用量显得尤为重要� Technical or product consultation: Ms. Xie.
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