CS217706B1 - Screen printing transparent reactive paint based on low melting lead frit - Google Patents

Abstract

The invention relates to a screen printing transparent reactive ink based on low-melting lead frit, comprising a medium, a colorant, a low-melting frit and other additional components, characterised in that the low-melting frit comprises lead oxide, silicon dioxide, boric oxide, tin dioxide, aluminium oxide, calcium oxide, magnesium oxide and further comprises a medium, for example polyethylene glycol, a colorant and other additional components, for example rutile. The invention provides a replacement for the previously imported screen printing reactive inks for the ceramic and glass industry.

Description

The invention relates to a screen printing transparent reactive ink based on low-melting lead frit, comprising a medium, a colorant, a low-melting frit and other additional components, characterised in that the low-melting frit comprises lead oxide, silicon dioxide, boric oxide, tin dioxide, aluminium oxide, calcium oxide, magnesium oxide and further comprises a medium, for example polyethylene glycol, a colorant and other additional components, for example rutile. The invention provides a replacement for the previously imported screen printing reactive inks for the ceramic and glass industry.

The invention relates to a screen printing transparent reactive ink based on low-melting lead frit (hereinafter referred to as screen printing reactive ink), which is produced in the form of a paste containing a medium, a colorant and a low-melting component. It is intended for relief decoration of the surfaces of ceramic and glass products using the screen printing application technique, with subsequent firing.

Screen printing reactive inks are complex disperse liquid systems whose behavior does not follow Newton's proportionality relation of tangential stress and deformation rate gradients. Screen printing reactive inks are particularly complex, where the decisive factors for the formation of a relief surface are the differences between the surface energy at the boundary of the applied drawing and the surface energy of the surrounding melt, as well as the reaction accompanied by spreading, but also sticking, shrinkage and subsidence of the glazed surface.

Until now, expensive porcelain inks, possibly modified by the addition of glazes and frits, have been used for the production of screen printing reactive inks, or special lead frits have been used without the use of porcelain inks and, rarely, frits containing vanadium, molybdenum, bismuth or tungsten oxides as reactive additives. The disadvantage of these screen printing reactive inks is their relatively weak reactive effect, manifested by an indefinite relief.

Another disadvantage is that these screen printing reactive inks are produced with a given color, which does not allow for special coloring according to individual needs. Another disadvantage of these screen printing reactive inks is that they use highly deficient metals as reactive additives.

This disadvantage is eliminated by a screen printing transparent reactive ink based on a low-melting lead frit containing a medium, the ink-

rod and low-melting frit, characterized by red 0.06490 that as a low-melting frit contains in molar- quartz 0.18242 low concentration: boric acid 0.56597 stannous oxide 0.01990 lead oxide 22.3 to 29.1 %, zinc oxide 0.01843 silicon dioxide 16.6 to 25.1%, kaolin 0.00159 boron trioxide 25.8 to 36.1%, dolomite 0.00552 stannous oxide 1.9 to 4.0 %, magnesia 0.00022 zinc oxide 1.2 to 2.5%, aluminum oxide up to 1.0%, This mixture is melted using ordinary glassmaking technology- calcium oxide up to 1.8 %, lead glass technology and by releasing the ta- magnesium oxide up to 2.5%, to water, to get out of it will get frit molar- and further includes a medium, such as its composition:

polyethylene glycol in concentration

18.0 to 28.0 % and a dye in a concentration of 1.0 to 15.0 %.

The screen printing reactive ink according to the invention is characterized in that it can be colored as desired and has a lower melting temperature than the top or bottom glaze.

When using screen printing reactive ink, the glass layers with different surface energy interact with each other, which is manifested at the interface of the applied decorative pattern by settling and spreading into the glaze surface, creating a distinctive relief pattern.

Design examples

Example 1

By grinding and mixing the raw materials, a glass stock is prepared with a mixture of these substances in the molecular ratio:

red lead 0.07000 quartz 0.18315 boric acid 0.56597 tin dioxide 0.01990 zinc oxide 0.01843 kaolin 0.00155 dolomite 0.00542 magnesia 0.00012

This mixture is melted using conventional lead glass technology and by pouring the melt into water, a frit with the molar composition is obtained:

Lead oxide 29.1% Silicon dioxide 25.0% Boron oxide 36.1% Tin oxide 4.0% Zinc oxide 2.5% Aluminum oxide 0.8% Calcium oxide 1.1% Magnesium oxide 1.4%

Example 2

By grinding and mixing the raw materials, a glass stock is prepared with a mixture of these substances in the molecular ratio:

lead oxide 27.0 silicon dioxide 25.1 boron trioxide 36.1 stannous oxide 4.0%' zinc oxide 2.5% aluminum oxide 1.0 % calcium oxide 1.8% magnesium oxide 2.5%

Example 3

Dry ground frit made according to example 1 is mixed with medium and colorant in a weight ratio of 77 : 19 : 4 and screen printed onto the overprint. The overprint is then glazed with a transparent or semi-transparent glaze. After firing, a relief decoration is created, the size of which can be influenced by the type of medium used and the density of the printing screen.

Example 4

The dry ground frit produced according to example 2 is mixed with medium, colorant and rutile in a weight ratio of 70 : 18 : 3 : : 9. The paste prepared in this way is screen printed onto the already glazed overglaze. After firing, a relief decor with a fine net-like pattern is created.

Claims (1)

Subject Screen printing, transparent, reactive ink based on low-melting lead frit, containing medium, dye, low-melting frit and supplementary components, characterized in that the low-melting frit contains lead oxide in a molar concentration 22.3 to 29.1%, silica in molar concentration 16.6 to 25.1%, boron oxide in molar concentration 25.8 to 36.1%, tin dioxide in molar concentration 1.9 to 4.0% YNALEZU zinc oxide in molar concentration 1.2 to 2.5%, alumina at a molar concentration of up to 1.0%, calcium oxide at a molar concentration of up to 1.8%, magnesium oxide at a molar concentration of up to 2.5%, and further comprises a medium for for example, polyethylene glycol at a concentration of 18-28%, a dye at a concentration of 1-15% and additional components, for example rutile, at a concentration of 9-18%.