| Author(s) | Collection number | Pages | Download abstract | Download full text |
|---|---|---|---|---|
| Дуфанець М. Є., Repeta V. B., Kukura Yu. A. | № 1 (68) | 161-169 |
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The article is devoted to the study of the properties of water-based textile screen printing inks, namely the study of the influence of the content of pigment concentrates in transparent color bases on the optical density and structural viscosity of the prepared screen printing inks. The work uses inks from two manufacturers of the “Magna Print” and “Inkuin” brands.
Screen printing plates with a PET 1500 grid produced by SEFAR AG with lineature of 43 lin/cm and copying emulsion based on diazophotopolymer emulsion “Dirasol 25” (Fujifilm-Sericol) are used for the research. Printing is carried out on fabric material – white futer. Final drying is carried out at a temperature of 140-150 oC, lasting 4.5-5,0 min. It is established that when pigment concentrates are added, the optical density of the inks layer increases, and the structural viscosity begins to decrease. To control these two parameters, a Gretag Machbech Spectro Eye spectrophotometer and a Brookfild RVT viscometer are used. For both series of inks, the optical density of imprints with the addition of concentrates increases almost uniformly, and when the content in the inks composition is within 6-7 %, the maximum optical density is reached Dy=0,81, Dc=1,47, Dm=1,36 Db=1,82 for the Magna Print brand, and for DP 2000 Inkuin inks – Dy=1,02, Dс=1,50, Dm=1,28 Db=1,62. The maximum difference in optical density when comparing two series of inks is 0,2 units. In both cases, for magenta and yellow inks, after reaching the corresponding maximum optical density, its decrease is observed. The research has established that the decrease in optical density is due to decrease in the value of the structural viscosity of these inks systems and, accordingly, to decrease in resistance during the capillary absorption of a liquid ink layer into the volume of textile material.
Keywords: water-based inks, screen printing plate, structural viscosity, textiles, optical density.
doi: 10.32403/1998-6912-2024-1-68-161-169
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