酒店在采购布草时，除了对织物的颜色、花型、纱织密度进行挑选外，缩水率指标同样重要。除了产品本身的质量问题，洗涤、烘干、熨烫都会对缩水率造成影响。

In addition to selecting the color, pattern, and yarn density of the fabric, the shrinkage index is also important when purchasing linen. In addition to the quality issues of the product itself, washing, drying, and ironing can all have an impact on the shrinkage rate.

"缩水率"的正式称呼为"水洗尺寸变化率"，是指纺织物在洗涤或浸水后收缩的百分数。

"Shrinkage rate", formally known as "wash size change rate", refers to the percentage of shrinkage of a textile fabric after washing or soaking.

缩水率=(洗涤前尺寸-洗涤后尺寸)/洗涤前尺寸×100%

Shrinkage ratio=(size before washing - size after washing)/size before washing × 100%

缩水率主要取决于不同面料之间的差异和织物结构。

The shrinkage rate mainly depends on the differences between different fabrics and the fabric structure.

通常来说，

Generally speaking,

全棉经向、纬向5%左右；

About 5% in warp and weft direction of cotton;

涤棉经向、纬向4%左右。

The warp and weft directions of polyester and cotton are about 4%.

除此以外，编织松散会比紧密型产品更易缩水。

In addition, loosely woven products tend to shrink more easily than compact products.

缩水的原因：

Reason for shrinkage:

一：产品本身问题

1： Problems with the product itself

预缩工艺不规范或工艺本身有问题

The pre-shrinking process is not standardized or there are problems with the process itself

预缩工艺是指用物理方法减少织物浸水后的收缩以降低缩水率的工艺过程。预缩目的是使织物在经纬向预行一定量的收缩，保持终成品缩水率的稳定，同时也能一定程度增加纺织品柔软性及手感。

Preshrinking process refers to the process of reducing the shrinkage of fabrics after immersion in water by physical methods to reduce the shrinkage rate. The purpose of preshrinking is to make the fabric undergo a certain amount of shrinkage in advance in the warp and weft directions, maintaining a stable shrinkage rate of the final product, while also increasing the softness and feel of the textile to a certain extent.

纺织品未达标准

Textiles not up to standard

对于生产不规范的布草供应商，存在“以次充优”现象，将40S产品代替60S产品销售。织物纱支粗细不同，缩水率也不同。纱支粗的布缩水率越大，纱支细的织物缩水率越小。

There is a phenomenon of "inferior to superior" among linen suppliers who produce non-standard products, and they sell 40S products instead of 60S products. The shrinkage rate of fabrics varies with the yarn count thickness. The larger the shrinkage rate of fabrics with coarse count, the smaller the shrinkage rate of fabrics with fine count.

热定型未做好

Heat setting not completed

熨烫过程中出现缩水，一般由于纺织品在生产过程中热定型未做好。具体表现为：同一方向的熨烫时，面料的经向或纬向收缩，造成缩水。

Shrinkage occurs during ironing, usually due to the fact that the textile is not properly heat set during production. Specifically, when ironing in the same direction, the fabric shrinks in the warp or weft direction, resulting in shrinkage.

二：洗涤原因：

2： Washing reason:

新布草洗涤温度过高

New linen washing temperature too high

温度对于布草洗涤来说是至关重要的，新布草初次洗涤温度不宜超过90°C。改善建议：在过水过程中不添加任何洗涤剂或只添加主洗剂，洗涤温度建议在70°C-80°C之间。

Temperature is crucial for cloth washing, and the initial washing temperature of new cloth should not exceed 90 ° C. Suggestions for improvement: Do not add any detergent or only add the main detergent during the water passing process, and the washing temperature is recommended to be between 70 ° C and 80 ° C.

烘干温度过高

Drying temperature too high

烘干温度超过95°不仅会造成缩水，还会导致纤维脆化、布草发黄等问题。以毛巾为例，正确烘干温度保持在75°C左右，干燥后需再冷却到5-10分钟，冷却温度到50°左右。

Drying temperature above 95 ° will not only cause shrinkage, but also lead to fiber embrittlement, fabric yellowing, and other issues. Take the towel as an example. The correct drying temperature should be maintained at around 75 ° C. After drying, it should be cooled to 5-10 minutes, and the cooling temperature should be around 50 ° C.

熨烫温度过高

Excessive ironing temperature

熨烫温度是影响熨烫效果的主要因素。如果熨烫温度过高，超过面料允许受热温度，面料易烫黄、烫焦、变形；熨烫温度过低，虽不损伤面料，但达不到熨烫效果。一般来说，纯棉面料熨烫温度不宜超过180°。

The ironing temperature is the main factor affecting the ironing effect. If the ironing temperature is too high, exceeding the allowable heating temperature of the fabric, the fabric is prone to yellowing, scorching, and deformation; The ironing temperature is too low, which does not damage the fabric, but does not achieve the ironing effect. Generally speaking, the ironing temperature of pure cotton fabrics should not exceed 180 °.

酒店布草的参数规格应考虑缩水率或者预计的洗后尺寸。产品在下完整订单之前，应在酒店洗衣房测试产前样。通常经过6次洗涤程序，产品会达到终洗后尺寸。

The parameter specifications for hotel linen should take into account shrinkage or the expected size after washing. Pre production samples should be tested in the hotel laundry before placing a complete order. Generally, after six washing procedures, the product will reach the final washing size.

采购大货，需要对品质的全流程把控，综合考虑产品的规格参数和内在产品质量指标，做好棉织品的维护和保养，创造良好的洗涤外部环境，强化细节管理，才能够使布草在正常寿命内大程度的发挥使用性能。更多相关事项了解就来我们网站http://www.jnadx.com咨询吧！

To purchase large goods, it is necessary to control the entire process of quality, comprehensively consider product specifications and internal product quality indicators, properly maintain and maintain cotton fabrics, create a good external environment for washing, and strengthen detailed management. Only in this way can cloth grass maximize its performance during its normal life. For more information, please visit our website http://www.jnadx.com Consult!