The color fastness to sweat light of vat dyes is related to its structural features. The vat dye molecules have not the water soluble group, less polar group and the the synthetic perspiration group have a little effect on the structure of it. The huge closed conjugate system give it high resistance to the light continuously.
As we all known, the cost of vat dye is higher than the reactive dye, which with high requires for the dye process control. So only in case of the high requires of the color fastness to sweat light, the vat dyes can be used for replacing some of the reactive dyes. 1. The color fastness to sweat light of the reactive dyes have the characters of reasonable sweat composition, easy test operation, strict standard and with the practical value. 2. Among the three-primary colors of the reactive color, the yellow primary color is better, the red is middle and the green is bad. 3.The flame retardant fabric processed with the green vitriol, the color turn yellow, with CuSO4, the color turn red, which two have little influence to the color fastness to sweat light. 4. Some of the light fastness khan agent and the anti UV agent can improve the color fastness of reactive dyes. 5. To direct fast dye for the medium and light color, the color fastness to light and sweat light is not high, wet color fastness is not as good as the reactive dyes, which can't replace the reactive dyes with low color fastness to sweat light. 6. Some of the sulfur dyes have good color fastness to sweat light, which can be used for reference. 7. The color fastness to sweat light of the vat is good, which can replace the reactive dyes with middle and low color fastness to sweat light, which is an important method to improve the color fastness to sweat light.
In conclusion, the method to improve the color fastness to sweat light is, to choose the reactive dyes with high color fastness or choose the vat dyes and some of the sulfur dyes. In the actual production, we should choose according the requires of the color fastness, production cost and the technic.
By YULONG tex
Reachants are chemicals or substances used in the dyeing or printing process to enhance the absorption of color by the fabric. They help improve the effectiveness and evenness of color application during textile dyeing.
Adding salt or dye fix to a dye solution helps improve the color intensity and durability of the fabric dyeing. Salt helps the dye molecules bond better with the fabric, while dye fixatives help set the dye in the fabric to prevent bleeding or fading during washing.
Yes, the color of fabric dye may change if boiled in a galvanized steel pot because galvanized steel can release chemicals such as zinc that may react with the dye and alter its color. It is recommended to use non-reactive materials like stainless steel or enamel when working with fabric dyes to prevent unwanted color changes.
No, bleach changing the color of a shirt is a chemical change. The active ingredient in bleach, sodium hypochlorite, reacts with the dyes in the fabric, breaking them down and removing their color. This results in a permanent change in the chemical composition of the fabric.
To set color in fabric using vinegar and salt, mix 1 part vinegar, 1 part salt, and 16 parts water in a container. Soak the fabric in this solution for an hour, then rinse it thoroughly with cold water. This method helps to lock in the color and prevent fading.
Color fastness to washing is important as it ensures that the color of a fabric remains intact and does not fade or bleed when laundered. It determines the durability and longevity of the fabric's color, maintaining its appearance wash after wash. This is crucial for maintaining the quality and aesthetic appeal of the garment or textile.
Wash fastness? Perhaps you mean color fastness? If that is the case, color fastness is the ability of fabrics to retain the dyes used to color them. Some fabrics hold dye within their fibers extremely well - like denim - while others do not (mostly synthetic or artificial non-natural fabrics) and tend to "bleed" when they are washed. The denim would therefore be more "color fast" than the other fabric.
Color fastness refers to how resistant an item is to fading or bleeding. This term is mostly associated with clothing and other textile materials.
Yes, some dyes require fixatives to help the color adhere to the fabric or material. Additionally, certain dyes may need binding agents to help the dye molecules bond to the material being dyed. Fixatives and binding agents can improve color fastness and overall durability of the dye.
The fastness of a dye refers to its resistance to fading or running when subjected to various conditions, such as washing, light exposure, and rubbing. High fastness indicates that the dye will retain its color well over time, while low fastness means the color may degrade or bleed. Fastness is an important quality in textiles and other dyed materials, as it affects their durability and appearance. Different dyes and textiles have varying levels of fastness, which can be assessed through standardized testing methods.
A dye and they bond system is a way to color fabric where the dye forms chemical bonds with the fabric, creating a strong and long-lasting color. This process ensures that the color does not bleed or fade easily. The bond between the dye and the fabric also helps to improve the overall color retention of the material.
The dyeing is a process to make the fabric lustrous according to the dye together with flame retardant fabric through chemical or physical chemistry way. Once the dyed flame retardant fabric colour fading, the fabric has been redyed if you want the fabric recover the original color. The flame retardant fabric dyeing process including surface adsorption, internal divergence and dye fixation.1, Surface adsorptionThe dye will be adsorbed the fiber surface when dipped the fiber to the dye liquor, this is the initial stage of the dyeing process. Good appetency and high concentration dye together with moderate electrolyte will increase the fiber adsorption speed, which will help to make the dyeing pricess correctly.2, Internal divergenceThe dye will be diffused to the fiber interior after the dye adsorbed to the fiber surface. This process is the longest stage in the whole dyeing process. In the dye liquor, the fiber surface dye spreads to the low concentration fiber interior, makes the dye added to the fiber surface continuous, until the fiber dye strength same as the dye strength in the dye solution. After transformation finished, the dye adsorption finished on the fiber surface. So, adsorption and diffusion are the inalienable and simultaneous process.3, Dye fixationThe dye adsorb, diffuse and permeate to the fiber surface and interior, and also fix on the fiber with all kinds of chain, the dye and fiber are diffrent, so as the fixation style, and because of the different fixation style, so as the dye fastness.By YULONG FR tex
1.Determine the concentration of flame retardant were described In the process of making process. It should be determined according to the size of the pad fluid rate and thickness of the fabric.2.The size of the tide content The fabric after pad flame retardant drying,it is should have some of the humidity for the sake of ammonia and fabric flame retardant on the crosslinking reaction When the ammonia smoked,occur flame retardant effect and with the washing resistance.In the process of production should be monitoring the size of the tide content at any moment,and adjust,Contain too small tide will lead to inadequate crosslinking,flame retardant effect not washable,contains too much tide will lead to excess crosslinking,feel stiff,color will also have changed.3.Determine the amount of ammonia flow The amount of consumption of ammonia by per kilogram of flame retardants in theory is certain,But the actual production process should be excessive some,in order that crosslinking fully.Usually too small ammonia flow rate can lead to inadequate crosslinking,flame retardant effect of washing resistance is poor;Excess flow,cause to waste and ammonia spillover,result in poor working conditions.In practical application, also should adjust the ammonia flow according to the thickness of a fabric and the size of the flame retardant agent to achieve the best effect of flame retardant.4.The concentration of oxidant The flame retardant after ammonia smoked curing in order to make it more stable,usually adopts padding hydrogen peroxide to achieve,the amount of hydrogen peroxide should be according to the thickless of fabric, the number of the amount of flame retardants. The speed of padding oxidation liquid should not too fast,make sure have enough hydrogen peroxide on the fabric,after drafty oxidation than wash with neutral soap,oxidation time shoulds not be too long, Otherwise, it will reduce the fabric strength.
The aramid fiber is the permanent flame retardant fiber, which is heat proof, high strength, high wear resistance, soft, low shrinkage, stable chemical structure, burning without drop, no poisonous and other adventure. The aramid fabric have good stability of size. The hot shrinkage is only 1% under 250℃. The fiber softening temperature is 373℃. And more than 400℃, the fiber begin to dissociate and at the same time the fabric become thick and the fiber expansion. And the fabric can isolated the heat transfer without dehiscence. For different staining method, the fabric have different performance: 1. Fiber dyed: dyed before weaving, never fade. 2. Fabric dyed: dyed after weaving, the color fastness, the standard of dry and wet rubbing is more than 3. Added the anti-static fiber and we can also treated with water oil repellent finish. And then sewing to the garment, the function is as bellow, 1. Permanent flame retardant, and the LOI is more than 28 2. Permanent anti-static 3. Permanent anti-acid alkali 4. High strength, wear proof, high tear resistance 5. No drop when burning, no poisonous gas 6. When burning, the cloth become thick, enhance the leakproofness and don't break out.
Reachants are chemicals or substances used in the dyeing or printing process to enhance the absorption of color by the fabric. They help improve the effectiveness and evenness of color application during textile dyeing.
Yes, burlap fabric can be dyed to change its color.
Fabric dyes work by chemically binding color molecules to the fibers of the fabric. This creates a permanent or semi-permanent color change. The dyeing process involves methods such as immersion, direct application, or printing to transfer the color onto the fabric.