The fixation degree of hotel linen dyes on the fabric is different: although the dyes are uniformly distributed on the fabric in the early stage, if the conditions are not properly controlled during the fixation process (such as temperature, time, dye and chemical concentration, etc.), the dyes on some parts of the fabric are not sufficiently fixed, and are removed during the post-treatment soaping, resulting in color difference.
染料在織物上先期分布不均勻：染料在固著之前，如果在織物各部位上分布不勻，固色后必然形成色差。造成這種現(xiàn)象的主要原因?yàn)椋?/div>
Uneven distribution of dyes on the fabric in the early stage: if the dyes are distributed unevenly on various parts of the fabric before fixation, color difference will inevitably occur after fixation. The main reasons for this phenomenon are:
(1)織物因素：由于纖維性能不同或前處理退、煮、漂、絲不夠勻透，使染前半制品滲透性不勻而引起對染料吸收程度的差異。
(1) Fabric factor: due to different fiber properties or insufficient uniformity of pretreatment, such as desilting, boiling, bleaching and silk, the permeability of semi-finished products before dyeing is uneven, resulting in the difference of dye absorption.
(2)吸液因素;由于機(jī)械結(jié)構(gòu)上的原因或操作不當(dāng)，使織物各部位的帶液率不一致，因而造成色差。軋輥壓力不勻、加入染化料不勻等都會使織物吸收染料不勻。
(2) Aspiration factor; Due to mechanical structure or improper operation, the liquid carrying rate of each part of the fabric is inconsistent, resulting in color difference. The uneven roller pressure and the uneven addition of dyes and chemicals will make the fabric absorb dyes unevenly.
(3)預(yù)烘因素：在浸軋染液后預(yù)烘時，由于烘燥的速率和程度不一致，引起染料發(fā)生不同程度的泳移，使染料在織物上分布不勻。
(3) Pre-drying factor: during the pre-drying after the dip dyeing solution, due to the inconsistent drying rate and degree, the dye migrates to different degrees, resulting in uneven distribution of the dye on the fabric.
染料色光發(fā)生變異：這種差異不是由于織物上染料分布不均勻造成的。而是由于某些原因引起織物上的部分染料的色光發(fā)生變化，一般有以下幾種原因：
Dye shade variation: this difference is not caused by uneven distribution of dyes on the fabric. It is due to some reasons that cause the color light of some dyes on the fabric to change. Generally, there are the following reasons:
(1)染前因素：半制品的白度不勻或pH值有較大差異，在染色后往往造成色光差異。
(1) Pre-dyeing factors: uneven whiteness or large difference in pH value of semi-finished products often cause color difference after dyeing.
(2)染色因素：例如分散染料熱溶溫度過高，使某些染料的色光變得萎暗;還原染料的過度還原，也會使色光有差異。
(2) Dyeing factors: for example, the high temperature of thermal solution of disperse dyes makes the color of some dyes dim; Excessive reduction of vat dyes will also cause color difference.
(3)染后因素：在后整理過程中如樹脂整理、高溫拉幅以及織物上PH值的不同等，都會引起染料色光有不同程度的變化。
(3) Post-dyeing factors: In the process of post-finishing, such as resin finishing, high temperature stretching and the difference of PH value on the fabric, the color of the dye will change to varying degrees.
(4)皂洗：如皂洗不充分，會使發(fā)色不充足色光不準(zhǔn)。
(4) Soap washing: if the soap washing is not sufficient, the hair color will be insufficient and the color light will be inaccurate.
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