JPH0641395B2 - Glaze for ceramics containing beer malt ash - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a new glaze for ceramics, and more specifically, it contains an ash having a unique chemical composition of beer lees produced as a by-product in brewing beer. It relates to the glaze for ceramics.

<Prior Art> Since ancient times, plant ash has been used as a raw material for glazes for pottery by being mixed with other mineral raw materials (porcelain stone, feldspar, clay, silica stone, limestone, etc.). The characteristic of the chemical composition of plant ash is that straw ash and paddy ash of rice have silicic acid content, and that of mulberry ash has lime content as their main components, and they also contain alumina, magnesia, alkali and the like. Although the phosphoric acid content is contained in the plant ash, it is a small amount, and even the highest content of the plant ash is about 2% (by weight).

However, the chemical composition varies greatly depending on the type of plant or plant, or even on the same plant. Therefore, it is difficult to supply a large amount of herbaceous ash with a stable composition as a raw material for glaze.

In addition, when the glaze is applied to the surface of the pottery at the time of use, it becomes a glassy thin layer by firing at an appropriate temperature, but it is an emulsion glaze caused by phosphoric acid content, that is, an emulsion state after firing. In order to produce a glaze which forms a thin layer of the above, regardless of whether grass ash is used as a component of the glaze raw material, bone ash, calcium phosphate or the like is further added and used as a blending component to the glaze.

Further, in order to make an emulsion glaze in a high-fidelity glaze, artificially added 1-6% of bone ash or calcium phosphate as a phosphoric acid component is commercially available as a synthetic glaze.

[Outline of Invention]

<Summary> It is an object of the present invention to provide a new glaze for ceramics, which uses a glaze raw material having a stable chemical composition and which can be supplied in a large amount and which has a stable quality and produces a characteristic glaze after firing. It is a thing.

The present inventors, by-product beer lees during beer brewing (is a residue of wort excess in the beer manufacturing process, for example, unsaccharified beer malt as the main component, and rice as a sub-component,
Examples of the non-saccharified product are auxiliary raw materials such as corn grits and corn starch. It was found that the above object can be achieved by using ash obtained by burning ash) as a glaze component in a specific range, and the present invention has been completed based on this finding.

That is, the glaze for ceramics according to the present invention, ash produced by burning ash of beer lees by-produced during beer production,
It is characterized by containing 5 to 60% by weight as a blending component.

<Effect> According to the present invention, since a large amount of beer lees ash that is a by-product during beer production is used as a blending component, effective use of beer lees and a large amount of stable quality glaze for ceramics are obtained. be able to. In addition, the ash of beer lees has a unique chemical composition compared to conventional plant and wood ash, which makes it uniquely milky after firing the glaze for ceramics, and a new type not seen in other glazes. It is possible to generate a glaze with a characteristic such as a crenellated pattern, a dot pattern, or a spot pattern.

The fact that the ash of beer lees has the above-mentioned effects,
It is understood that it was unexpected for a person skilled in the art.

[Specific Description of the Invention]

The glaze for ceramics according to the present invention contains ash (hereinafter also referred to as beer malt ash) produced by burning and ashing beer lees produced as a by-product during beer production in an amount of 5 to 60% by weight as a component. It has been described above that it is characterized by, by applying to the surface of the ceramic body at the time of use and then firing at an appropriate temperature, a vitreous thin film having a characteristic appearance on the surface of the base material, that is, It is for forming a glaze (hereinafter, unless otherwise specified,% indication means% by weight).

The beer lees referred to in the present invention are the residues of wort excess in the beer manufacturing process. The main component is the unsaccharified product of beer malt, but it may also contain an unsaccharified product of an auxiliary raw material (for example, rice, corn grits or corn starch) as an auxiliary component.

<Beer malt ash> The beer lees ash in the present invention, that is, beer malt ash, is obtained by using a beer lees as described above using a general ashing device, for example, a fluidized bed combustion device, an electric furnace, a gas furnace. It is incinerated by burning at an appropriate temperature, specifically about 700 to 1100 ° C. When combusting, the beer lees are refined by a suitable refining means, such as a vibrating screen, if necessary, and a suitable water content, preferably 70%, by a suitable dewatering means, such as a belt press or a screw press. It is desirable to dehydrate to the following extent.

The characteristic of the chemical composition of the beer malt ash in the present invention is that it contains a large amount of amorphous silicic acid and phosphoric acid content, and in particular, it contains a large amount of phosphoric acid content as compared with that of conventional straw ash, paddy ash, or hull ash. is there.

By using the glaze consisting of such a specific composition, with a proper blending amount as described later, a unique emulsion glaze after baking, and a new heavenly-like shape, dot-like shape or other not seen in other glazes. It forms a characteristic glaze such as a spotted pattern.

An example of the chemical composition of beer malt ash is shown in Table 1 below by comparison with conventional plant and wood ash.

<Glazing for Ceramics> The glaze for ceramics according to the present invention is made by blending the above-mentioned beer malt ash with other raw material components, and has 5 to 5 as a blending component.
60%, preferably 10-55%.

The other raw material component is a mineral raw material. Examples thereof include porcelain stone, feldspar, clay, silica stone, and limestone, and one or more of these components can be selected and used.

In addition, the above-mentioned mixing ratio is weight% when the total of the mineral raw material and the beer malt ash is 100.

The glaze is in the form of powder, and the drug is generally suspended in water.

The content of beer malt ash makes the glaze according to the invention produce a glaze with a unique appearance aesthetic after firing. That is, with a blending ratio of beer malt ash of about 5 to 15%, preferably about 10 to 15%, a unique milk that can be clearly distinguished from the cases of other straw ash, paddy ash, and persimmon ash. It produces a turbid glaze (texture and luster) in the form of emulsion (fine crystals are densely distributed) or matte (matte glaze, very fine crystals are densely distributed). When the blending ratio of beer malt ash is 15% or more and 60% or more, preferably about 55% or less, due to the phase separation phenomenon that occurs during melting of the glaze by firing, that is, the vitrification process, mottled (shading) Peculiar glazes such as stripes) and dots (small spots are evenly present) are generated, and the above peculiarities increase or become apparent as the blending ratio of beer malt ash increases.
New glazes (large dots are evenly distributed), dots, spots, etc., which cannot be seen when using other conventional glazes that artificially add bone ash or calcium phosphate etc. To do.

Examples of combinations of ingredients in the glaze according to the present invention are shown in Experimental Examples.

The glaze according to the present invention is colored in a desired color after firing by further adding an appropriate coloring agent such as ferric oxide, manganese oxide, cobalt oxide, nickel oxide, and chromium oxide, if necessary. Can be done.

<Firing / Glazing> The glaze according to the present invention is applied in a suspended state to the surface of a ceramic body and then subjected to general firing conditions, that is, usually 1200 to
By firing at a temperature of about 1300 ° C. under an oxidizing flame or a reducing flame, a glaze with a unique appearance as described above is formed. For the general method of baking, known literatures, for example, "Glazed and its pigment" by Yoichi Saki (first edition, October 20, 1968, Gihodo Co., Ltd.) can be referred to.

<Experimental Examples> The following are some experimental examples of the present invention that form the most characteristic glaze, but the present invention is not limited thereto.

Preparation Example: Preparation of beer malt ash Beer lees produced from a saccharified charge with 75% malt and 25% auxiliary raw materials (rice, corn grits, corn starch) were dehydrated to a water content of 65% and burned at 1000 ° C. Prepared.

Preparation Example: Preparation of Glaze Using the beer malt ash obtained in Preparation Example, a glaze was prepared according to the composition shown in Table 2.

Baking Example 1: Formation of Dotted Glaze By firing a glaze (Formulation Example 1) containing 50% beer malt ash at 1200-1300 ° C., circular dots are formed due to the cohesive force during melting of the glaze. A rare glaze was obtained.

Baking example 2: Formation of milk white glaze Glaze containing 10% beer malt ash (Formulation example 2)
By firing at 1,200-1,300 ° C, a unique milky glaze was obtained as compared with the conventional glaze using bone ash or calcium phosphate.

Baking Example 3: Formation of Iron Red Glaze 11% of a coloring agent (ferric oxide) into a glaze (formulation example 3) containing 17% beer malt ash (glazing: coloring agent = 10)
By adding 0:11) and baking at 1200-1300 ° C., characteristic point-like iron red glaze was obtained as compared with the conventional synthetic glaze using bone ash or calcium phosphate.

Baking example 4: Formation of yellow-green matt glaze 11% of a coloring agent (ferric oxide) was added to a glaze (formulation example 4) obtained by adding 11% of beer malt ash to a barium-based glaze (glaze: coloring agent = 100: 11) added, 1200-130
A yellow-green matte glaze was obtained by baking with an oxidizing flame at 0 ° C., and a silver chocolate-colored matte glaze was obtained by baking with a reducing flame.

Baking example 5: Formation of mottled glaze A new mottled glaze was obtained by baking a glaze (formulation example 5) containing 40% beer malt ash in a barium glaze at 1200-1300 ° C.

Baking Example 6: Formation of Red-Black Tenmoku Glaze 11% of a coloring agent (ferric oxide) was added to a glaze (formulation example 6) containing 17% of beer malt ash (glazing: coloring agent 10).
0:11) and fired at 1200-1300 ° C. to obtain a new red-and-black textured red-black textured glaze.

Claims (1)

[Claims] 1. A glaze for ceramics, characterized by containing 5 to 60% by weight of ash produced by burning and converting beer lees produced as a by-product during beer production as a compounding ingredient.