Digital decoration in ceramics: a study on the development of color, profile, colorimetric space and ceramic raw materials.

Reference	Presenter	Authors (Institution)	Abstract
16-040	Julia Soratto Ribeiro	Acordi, J.(Universidade Federal de Santa Catarina); Vanderlind, G.E.(Faculdade SATC); Sartor, M.N.(Faculdade Satc); Melo, A.R.(Faculdade Satc); Milak, G.B.(Universidade do Extremo Sul Catarinense); Ribeiro, J.S.(Universidade do Extremo Sul Catarinense); Mattos, A.(Faculdade SATC); Bianchini, S.S.(Faculdade SATC);	The ceramic industry invests every year in new technologies in order to produce differentiated products. One of the new technologies, which is spreading in the Brazil, is the digital decoration with soluble salts. It is known that, just like a traditional ceramic printing ink, the development of colors with soluble salts is also influenced by substrate raw materials. The objective of this work is to evaluate how alumina, dolomite, quartz and zirconia influence the development of the colors of the soluble salt decorated on the ceramic primer. A profile creation and colorimetric space analysis was used as a tool for analysis of color development. The experimental procedure was developed with a slurry preparation for prime, following the development of 8 formulations, where the addition of 5% and 10% of alumina, dolomite, quartz and zirconia, respectively, were varied. These formulations were applied to a ceramic part with the help of an air gun. Then they were dried, printed on them colorimetric charts with 500 patches, using a laboratory plotter and later heat treatment in industrial furnace. To analyze of the colors, the test cards were read; profile creation and development analysis using scatter plots. With an analysis of the results it was possible to notice that alumina and zirconia behaved in a refractory manner, which favored a clearer colors. The dolomite, in turn, behaved slightly faintly, which favored obtaining darker tones. Regarding the development of colors, it was observed that the Al+3 ions favored the development of blue and green and, damaged yellow and red. The ions of Zr+4 favored blue and green and damaged the red. The Si+4 ions from the quartz were inert for the development of color and luminosity. Finally, the ions of Mg+2 and Ca+2 from dolomite favored green and yellow colors and damaged red.
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