RU2057775C1 - Greenish yellow ceramic luster paint - Google Patents

Abstract

FIELD: decoration of porcelain-faience ware. SUBSTANCE: greenish yellow ceramic luster paint comprises (%): 8.33-12.50 bismuth resinate; 16.67-30.0 cobalt resinate; 3.0-10.0 manganese resinate; 1.50-9.0 nickel resinate; and the organic solvent balance (mixture of nitrobenzene and turpantine 1:1). The paint is prepared by mixing metal resinates. The properties of the paint: it has good gloss, dominating wave length of 572 nm, i.e. color corresponds to the greenish yellow region of the spectrum. Color characteristics of the paint are stable and reproducible. EFFECT: improved properties of the ceramic luster paint. 2 tbl

Description

 The invention relates to compositions of ceramic chandelier paints, in particular to overglaze paints, which give a fading, rainbow effect after firing and intended for decorating porcelain and faience products.

Known ceramic luster paint, including resinates of bismuth and cobalt and an organic solvent nitrobenzene, turpentine and chloroform [1]
Famous paint has a turquoise color. The organic component that burns out during firing is 96.7%
Closest to the invention is a ceramic chandelier paint greenish yellow, containing resinates of bismuth and cobalt and an organic solvent nitrobenzene in turpentine in a mass ratio of 1: 1 [2]
However, the gloss of the known paint is not high enough.

The objective of the invention is to expand the color scheme of the decor by creating a ceramic chandelier paint with stable and individual color characteristics that lie in the greenish-yellow region of the spectrum with a color difference of E 1.5 u C 1 E AB (1976 and high gloss). This is achieved by the fact that the ceramic chandelier paint is greenish-yellow, including bismuth resins, cobalt and an organic solvent, a mixture of nitrobenzene and turpentine in a mass ratio of 1: 1, additionally contains manganese and nickel resinates in the following ratio, wt. Bismuth rubber 8.33-12.5 Cobalt rubber 16.67-30.0 Manganese rubber 2.0-10.0 Nickel rubber 1.5-9.0
Organic Solvent Else
To prepare the proposed luster ink which is a mixture of metal resinates, included in its composition, is prepared separately each resinate by the following procedure: into the molten rosin at 170-190 ^{° C} in small portions introduced a corresponding amount of a metal salt constituting the luster of paint, the temperature was raised 15-20 ^{° C,} and heated to the reaction. A mixture of solvents, for example, turpentine with nitrobenzene in equal amounts, is introduced into the prepared resinate and left to cool and stand for 24 hours. After this, the solution is filtered through a sieve with 100,000 holes / cm ² , settled for 15 days and decanted. To obtain a ceramic chandelier paint, the resins are mixed in the selected ratio.

 The alleged invention is illustrated by specific examples 1-5 (see table 1). The coloristic characteristics of the paint are presented in table 2.

Fixing conditions of this ceramic ink following: Offered luster ceramic paint is applied to glazed porcelain and earthenware articles and dried for 30-35 min at normal conditions at a temperature of 760-830 ^{° C} and held at maximum temperature for 5-10 min.

Колористические характеристики
P, чистота тона
λ_D, нм цветность
S насыщенность
B_λD блеск
Н цветовой тон
Е цветовое различие
ед. СIELAB
Из данных табл.2 при расчете по форму- ле ΔE=

следует, что цветовое различие Δ E_o краски по примерам 1-3 составляет в среднем 0,4 ед CIELAB, т. е. она визуально неразличима. Поскольку ΔЕ_о небольшая величина, возьмем за базу для дальнейших расчетов колористические характеpистики предлагаемой краски (пк) по примеру 2. Тогда, из данных табл.2 следует, что цветовое различие между предлагаемой люстровой краской и краской-прототипом по ТУ, Δ Е_пк-ту=6,2 ед. что удовлетворяет условиям задачи изобретения (Δ Е ≥ 1,5 ед CIELAB). Цветовое различие между предлагаемой краской и красками с составами, лежащими за пределами концентраций компонентов, указанных в формуле изобретения (примеры 4 и 5) соответственно равны ΔЕ_пк-4=5,9 ед. Δ Е_пк-5-8,65 ед. Цветовое различие между краской по примеру 4 и краской-прототипом Δ Е_4-ту равно 0,35 ед. т.е. эти краски визуально неразличимы, что не удовлетворяет условию задачи изобретения.In table 2, the legend has the following names:

Coloristic characteristics
P, purity
λ _D , nm color
S saturation
B _λD Shine
H color tone
E color difference
units SIELAB
From the data of Table 2, when calculated by the formula ΔE =

it follows that the color difference Δ E _{o of the} paint according to examples 1-3 is on average 0.4 units CIELAB, that is, it is visually indistinguishable. Since ΔЕ _{о is} small, we take as a basis for further calculations the coloristic characteristics of the proposed paint (pc) according to example 2. Then, from the data in Table 2 it follows that the color difference between the proposed chandelier paint and the prototype paint according to TU, Δ E _{pc- tu} = 6.2 units which meets the conditions of the task of the invention (Δ E ≥ 1.5 units CIELAB). The color difference between the proposed paint and paints with compositions lying outside the concentration of the components specified in the claims (examples 4 and 5) are respectively equal to ΔE _pc-4 = 5.9 units. Δ E _pc-5 -8.65 units. The color difference between the paint of example 4 and the prototype paint Δ E ₄ is 0.35 units. those. these paints are visually indistinguishable, which does not satisfy the condition of the task of the invention.

Although the color difference between the paint of example 5 and the prototype paint is large and is Δ E _5-tu = 4.2 units. which corresponds to the conditions of the task of the invention, the color difference between the paint of example 5 and the proposed paint is also large and is Δ E = 8.65 units. which does not provide the desired shade and increase gloss.

.The luster of the chandelier paint according to examples 1-5 and TU is defined as the ratio of the reflection coefficient with a mirror component R ₃ to the reflection coefficient without a mirror component, R _s , with a dominant wavelength λ _D according to the formula:
Bλ _d

.

 For the chandelier paint of the prototype according to TU, the gloss is 1.4; for the proposed paint, the gloss is stronger and equal to 2.1, which should be attributed to the advantages of the proposed paint.

The data in Table 2 indicate that the proposed chandelier paint, like the prototype paint according to TU, has a dominant wavelength λ _D of 572 nm. those. its color corresponds to the greenish-yellow region of the spectrum (IOC color chart, 1931), although the color of the proposed paint is visually greenish-gray, since the color characteristics of A and B are small in absolute value and the color of the proposed paint approaches achromatic. The color tone “H” of the paints is approximately the same for all the considered examples, except for example 5. The purity “P” and the saturation “S” of the color satisfy the decor requirements.

 The color characteristics of the paint are stable and reproducible in the range of concentrations of the components specified in the claims.

 Thus, the proposed chandelier paint has a color difference with the prototype paint Δ E> 1.5 u CIELAB, stable color characteristics, stronger gloss compared to the prototype paint.

Claims (1)

 CERAMIC CHANDEL PAINT OF GREEN-YELLOW COLOR, including bismuth and cobalt resinates, a solvent mixture of nitrobenzene and turpentine in a mass ratio of 1 1, characterized in that it additionally contains manganese and nickel resinates in the following ratios of components, wt. Bismuth rubber 8.33 12.50
Cobalt rubber 16.67 30.0
Manganese Rubber 2 10
Nickel rubber 1.50 9.0
Organic solvent Else

Images