The dyephilic structure genes on the molecules of color fixing agent give rise to the formation of hydrogen bonds between the fixative and dye, which is combined with van der Waals force. Figure 3 shows that for Reactive Yellow K-R and Reactive Yellow B-4RFN, with the increase of the concentration of alkali, the exhaustion and fixation levels gradually increased, after reaching the maximum value, the exhaustion and fixation levels decreased when the concentration of alkali was further increased. The trend of the change in exhaustion and fixation levels was similar, but the optimal amount of alkali was different, sodium carbonate was required 10 g/L and 15 g/L for the two dyes, respectively. So the sodium carbonate concentration was 10 g/L for reactive yellow K-R and 15 g/L for reactive yellow B-4RFN. An old towel or protective cape to cover your shoulders and prevent staining on your clothes – you may also want a hair grip to keep it in place. Some people also like to use a tail comb to part the hair or an application brush to apply. Don’t forget a watch or timer to keep an eye on your development time! STEP 1: PREPARE YOUR COLOUR Figure 2 shows that for Reactive Yellow K-R, with the increase of the salt concentration, the exhaustion and fixation levels gradually increased, but after the amount of sodium chloride reached 40 g/L, the exhaustion and fixation levels decreased significantly. As for Reactive Yellow B-4RFN, the best salt concentration was 50 g/L sodium chloride. Meanwhile, at the maximum fixation level, the salt concentration for Reactive Yellow B-4RFN was higher than that of Reactive Yellow K-R, the reason was that bifunctional reactive dyes consumed more accelerating agent. However, an overdose of sodium chloride would cause uneven dyeing due to dye aggregation. So the sodium chloride concentration was about 40 g/L for Reactive Yellow K-R and 50 g/L for Reactive Yellow B-4RFN. Alkali concentration Soybean protein/flax blended yarns (70:30) used for reactive dyeing were kindly provided by Qiqihar Jinya Group (China). Chemicals

Ling, C. Soybean protein fiber dyeing with B type reactive dyestuffs. Dye. Finish. 31(7), 26–28. https://doi.org/10.3321/j.issn:1000-4017.2005.07.009 (2005). Using the wrong type of roller can cause foaming of a paint film. Sponge or foam rollers should be avoided with water-based paints. Long pile rollers must be wetted out properly. Foaming happens when air gets into the wet paint film to create air bubbles. When these bubbles burst craters are left on the film surface. Sometimes these craters dry to give an even film. Putting it rightEnsure your hair is dry and clean, as a build-up of styling products can affect your colour result. We recommend colouring your hair the day after washing, to allow some of the scalps natural oils to be produced as this will further help protect your scalp during colouring. Allow the surface to dry and then rub down using 'wet and dry' abrasive paper and a solution of warm water and detergent. Once rinsed and dried the area can be repainted.

CLEANSE: Wash your hair with a natural pH shampoo, such as the NATURTINT® Colour Fixing Shampoo to gently cleanse and moisturise your hair. Gently massage into a lather and then rinse thoroughly. The reactive intersexual group of the color fixing agent molecule is covalently bonded with the active group on the fiber and dye. The application processes of formaldehyde-free color-fixing agent DM-2158 were also determined, namely, for blended yarns dyed with Reactive Yellow K-R: DM-2158 concentration 2% owf., bath to material ratio 10: 1, impregnated at impregnation temperature 45 °C for 20 min, cured at 115 °C for 1.5 min; for blended yarns dyed with Reactive Yellow B-4RFN: DM-2158 concentration 1.5% owf., bath to material ratio 10: 1, impregnation temperature 45 °C for 20 min and cured at 115 °C for 1 min. RINSE: Once you have reached your desired development time, using gloved hands, gently massage your hair whilst thoroughly rinsing it with warm water until the water runs completely clear, making sure that no hair colour gel remains in the hair. If colour residue persists, you can also wash your hair with a natural pH shampoo, such as the Naturtint Colour Fixing Shampoo and rinse again with plenty of water. When the surface is thoroughly dry the affected surface will need to be rubbed down using 'wet and dry' abrasive paper. It can then be re-coated.

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Irfan, M., Xie, K. & Hou, A. Effect of reactive dye structures and substituents on cellulose fabric dyeing. Fiber. Polym. 21(9), 2018–2023. https://doi.org/10.1007/s12221-020-9472-0 (2020).

As one of the indispensable auxiliaries in the textile printing and dyeing industry, colorfixing agent can improve the wet resistance of dyes in the textile, and ensure the dye is firmly attached to the fabric, so as to achieve the effect of fixing color on fabrics. Dye Fixing Agents—— Our Special Products April 9, 2019 HT Fine Chemical Co., Ltd. has launched dye fixing agents with a heavy pound!Dye fixing agents is one of the important assistants in printing and dyeing industry. In recent years, with the development... view Marcela, F. et al. Development and characterization of weft-knitted fabrics of naturally, occurring polymer fibers for sustainable and functional textiles. Polymers 13(4), 665. https://doi.org/10.3390/POLYM13040665 (2021). Protect your shoulders with a towel to prevent accidental staining of your clothes. You may also wish to protect the immediate surrounding area, especially any carpets or fabric, as permanent staining may occur if colour mixture is accidentally spilt.Brightness and contrast – how well elements appear in a picture without looking washed out or too dark.

The bleached yarns were dyed using two types of reactive dyes, reactive yellow K-R (with monofunctional groups) and reactive yellow B-4RFN (with bifunctional groups). Dyeing was carried out using different technique parameters at a bath to material ratio from 10:1 to 50:1 [10:1, 20:1, 30:1, 40:1, 50:1]. The dye concentration was 2% owf. The initial temperature of dyeing was 40 °C. Half the amount of sodium chloride (NaCl) was added after dyeing 5 min, the remaining salt was added in another 15 min. Fixing temperature maintained was from 60 to 90 °C [60, 70, 75, 80, 85, 90 °C], fixing time was adjusted to be from 20 to 60 min [20, 30, 40, 50, 60 min], alkali (Na 2CO 3) concentration was from 5 to 25 g/L [5, 10, 15, 20, 25 g/L], salt concentration was from 10 to 60 g/L [10, 20, 30, 40, 50, 60 g/L]. Alkali was added in batches. After dyeing, the yarns were soaped in 2 g/L soap powder and 2 g/L Na 2CO 3, and the liquor to material ratio was 30:1. Exhaustion and fixationIt can be seen from Table 1 that for Reactive Yellow K-R, the optimum concentration of dye-fixing agent was 2.0% owf., which was the best of all colorfastness values and the optimum breaking strength retention. For Reactive Yellow B-4RFN, although the concentration of dye-fixing agent was 2.0% owf., it showed the best fastness to washing and rubbing, but the breaking strength of the blended yarns decreased greatly, therefore, the concentration of the dye-fixing agent DM-2518 was chosen as 1.5% owf.. Curing temperature