Fibre Film Contactors

Ink dot distribution on cotton fabrics determines the colour performance of reactive dye inkjet printing, and ink drop spreading is one of the important factors influencing the ink dot distribution. In order to reveal the relationship between fabric pretreatment and ink drop spreading, two pieces of cotton fabric were pretreated respectively with sodium alginate and sodium alginate plus high fatty acid derivative solutions. Results indicate that the surface energy of the cotton fabrics was reduced from 73.79 to 69.45 and 58.49 mJ m−2 after the pretreatment with sodium alginate and sodium alginate plus high fatty acid derivative respectively. Correspondingly, the spreading area of cyan ink drops on these fabrics was reduced from 104.9 to 92.5 and 72.3 mm2. Furthermore, on the fabric treated with sodium alginate plus high fatty acid derivative, the strip‐like ink dots were narrow and short, which means the dye was concentrated in an area on the fabric surface. Colorimetric values of the inkjet‐printed fabrics demonstrated that the high fatty acid derivative would enhance the ability of sodium alginate to control ink droplet spreading, thereby improving the colour performance.

Section: Introductionmentioning

confidence: 99%

Effect of cotton fabric pretreatment on drop spreading and colour performance of reactive dye inks

Liu

Fang

Gao

et al. 2016

“…Digital inkjet printing is becoming increasingly competitive in the textile-printing marketplace because of the availability of high print speeds of 70-100 m/min using the standard CMYK ink set [1,2]. In addition, the benefits of digital printing include personalisation and quick responses to fashion changes, short print runs and justin-time delivery, quick transfer of designs to different locations, viability for different substrates, no need for screens, low energy costs, and a low negative impact on the environment [3,4]. Thus, the interest in this technology is growing in the print industry, including the textiles sector [5,6].…”

Section: Introductionmentioning

confidence: 99%

Pretreatment effects on pigment‐based textile inkjet printing – colour gamut and crockfastness properties

Ding

Shamey

Chapman

et al. 2018

The application of two commercial pretreatment agents, formulated to improve the performance of a sixcolour nano-scale pigment ink set during the textile inkjet printing of cotton and polyester (PET) fabrics, was examined. An industrial scale printer, operating at 55 linear m/h and equipped with Kyocera printheads, was used to print on commercial fabrics (180 cm wide) prepared for digital printing. The work employed an industrial scale rather than a benchtop printer to enhance the utility of the results for a commercial environment. The colorimetric attributes of printed fabrics were recorded for the individual inks as well as for spot colour combinations generated using Dr. Wirth RIPMaster v11 software. Colour table profiles were also generated and the colorimetric values of inks were compared. Colour gamuts of inks on cotton and PET, including three-dimensional volumes in the CIELab space, were examined to assess the role of pretreatment on the colorimetric properties of the printed substrates. It was found that the pretreatments enhanced the ink receptiveness, colour intensity and colour gamut of fabrics. Pretreatment of cotton resulted in a larger gamut and more vivid colours than on PET. However, wet and dry crockfastness results were found to be low. In this regard, Time-of-Flight Secondary Ion Mass Spectrometry analysis of fabrics printed in the presence and absence of pretreatment indicated that the low crockfastness arises from higher pigment levels on the surface of the pretreated fabric. Coloration Technology Society of Dyers and Colourists

“…In the last two decades, digital ink-jet printing has found an increasing number of applications in the printing of textiles. It is foreseen that the traditional flat or rotary screenprinting and roller printing techniques may be superseded by digital printing technologies in the near future [1][2][3][4][5][6][7]. Cellulosic fabric can be printed on with reactive dye-based inks [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Single‐phase ink‐jet printing onto cotton fabric

Soleimani‐Gorgani

Shakib

2013

The current commercial application of ink‐jet reactive inks to cotton fabrics requires pretreating with pad liquor containing a thickener, urea and alkali prior to printing. In this study, attempts have been made to develop a reactive ink‐jet print in a single‐phase process by adding an organic salt to the ink formulation and hence removing the need to pretreat fabrics. This approach utilises inks containing both a reactive dye, in this case Procion Red H‐E3B, and an organic salt such as sodium formate, sodium acetate, sodium propionate or tri‐sodium citrate. The behaviour of a novel reactive ink formulation for ink‐jet printing on to cotton fabric was evaluated at different pH vlaues. The results at optimum pH indicated that printed non‐pretreated fabrics with ink containing organic salts exhibited a higher level of reactive dye fixation than printed pretreated fabric containing no organic salt ink. The yielded prints demonstrate excellent colour fastness to washing and dry/wet crocking properties. The light fastness of the printed fabrics was improved by adding an organic salt to the ink formulation.