JPH06219788A - Method for decorating glass by ion exchange - Google Patents
Method for decorating glass by ion exchangeInfo
- Publication number
- JPH06219788A JPH06219788A JP7560192A JP7560192A JPH06219788A JP H06219788 A JPH06219788 A JP H06219788A JP 7560192 A JP7560192 A JP 7560192A JP 7560192 A JP7560192 A JP 7560192A JP H06219788 A JPH06219788 A JP H06219788A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- ion exchange
- decorating
- color
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
- C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はガラス表面をイオン交換
により装飾処理する方法に関する。FIELD OF THE INVENTION The present invention relates to a method for decorating a glass surface by ion exchange.
【０００２】[0002]
【従来の技術】従来、ガラス表面を着色する方法は種々
あるが、乳白色に処理する方法としては次の〜のよ
うな技術があった。2. Description of the Related Art Conventionally, there are various methods for coloring the surface of glass, but the following techniques have been known as methods for treating milky white.
【０００３】 乳濁ガラス法 無色透明なガラスの中に母体のガラスと屈曲率が異なる
微細な結晶或いはガラスの粒子を一様に析出させ、光の
散乱により乳白色に見えるようにする。この場合、乳濁
剤として、ＴｉＯ2 、ＺｒＯ2 、ＳｎＯ2 等の酸化物や
燐酸カムシウム等のリン酸塩、蛍石等のフッ化物を使用
する。Emulsion glass method Fine crystals or glass particles having a different bending rate from the matrix glass are uniformly deposited in colorless and transparent glass so that it appears milky white by light scattering. In this case, oxides such as TiO 2 , ZrO 2 and SnO 2 , phosphates such as camcium phosphate and fluorides such as fluorspar are used as the emulsifying agent.
【０００４】 結晶化ガラス法 ガラス原料を一度完全に溶融し均一な融液とした後、プ
レスやブロウにより任意の形状に成形し、冷却してから
再び徐々に加熱することにより器物の形状を変えること
なくガラスを微細な結晶の集合体にする。Crystallized glass method Once the glass raw material is completely melted to form a uniform melt, it is shaped into an arbitrary shape with a press or a blow, cooled, and then gradually heated again to change the shape of the container. Without making the glass aggregate of fine crystals.
【０００５】 印刷法 ガラス表面に白色塗料を塗り焼き付ける方法。 コーティング法 白色の塗料を含有する樹脂類でガラス表面をコーティン
グする方法。Printing method A method in which a white paint is applied and baked on the glass surface. Coating method A method of coating the glass surface with a resin containing a white paint.
【０００６】なお、その他、いわゆるスリガラス状にす
る方法として、フッ酸処理やサンドブラスト処理等があ
るが、これらはガラス表面を粗面とする処理で、乳白色
にする処理とはいえない。[0006] In addition, there are hydrofluoric acid treatment and sand blast treatment as other so-called frosted glass methods, but these are treatments for roughening the glass surface, and cannot be said to be milky white.
【０００７】また、イオン交換により緑色に着色する方
法として例えば特開昭５５−１６７１５８号公報に記載
の方法がある。この方法は、Ａｌ2 Ｏ3 を含有するソー
ダ石灰シリカガラスを高温で銅塩の蒸気に接触させてガ
ラス中のＮａ2 Ｏを銅イオンとイオン交換させ、またそ
のイオン交換をＡｌ2 Ｏ3 で助長してガラスを緑色に着
色する。As a method of coloring green by ion exchange, for example, there is a method described in JP-A-55-167158. In this method, soda lime silica glass containing Al 2 O 3 is contacted with vapor of copper salt at high temperature to exchange Na 2 O in the glass with copper ions, and the ion exchange is performed with Al 2 O 3 . Helps to color the glass green.
【０００８】[0008]
【発明が解決しようとする課題】上述した従来の方法の
うち、は製造コストが非常に高く、または、結晶核
形成剤の添加や耐熱ガラス等の結晶化しやすい組成のガ
ラスを選ぶ必要があり、原料も製造費も高くなる。及
びではガラス表面に塗料を付着させるので、高級感が
無く、また塗料が剥離する欠点がある。また、イオン交
換による方法を含めて従来のいずれの方法でも、蛇紋の
ような装飾性の高い高級感のある模様を現出させること
ができなかった。Among the above-mentioned conventional methods, the production cost is very high, or it is necessary to add a crystal nucleating agent or to select a glass having a composition that easily crystallizes, such as heat-resistant glass. Raw materials and manufacturing costs are high. In and, since the paint adheres to the glass surface, there is no high-grade feeling and there is a drawback that the paint peels off. In addition, with any of the conventional methods including the method by ion exchange, it was not possible to reveal a highly decorative pattern with high decorativeness such as a serpentine pattern.
【０００９】本発明の目的は、ガラス表面をイオン交換
によって乳白色又はそれに近い色に変色できると同時
に、更に大理石状（蛇紋）ないし亀甲状の模様を呈する
ように装飾することができる、斬新なガラスの装飾方法
を提供することにある。The object of the present invention is a novel glass which can change the glass surface to a milky white color or a color close to it by ion exchange, and at the same time, can be decorated so as to have a marble (serpentine) or turtle shell pattern. To provide a decoration method.
【００１０】[0010]
【課題を解決するための手段】本発明による方法は、ガ
ラス中のナトリウム及び／又はカリウムをリチウムとイ
オン交換させてガラス表面に無数の微細なクラックを生
じさせる。模様を現出させるには、微細なクラックが肉
眼で見える大きなクラックになるまでイオン交換を行
う。The method according to the present invention ion-exchanges sodium and / or potassium in the glass with lithium to produce numerous minute cracks on the glass surface. To reveal the pattern, ion exchange is performed until the minute cracks become large cracks that can be seen with the naked eye.
【００１１】イオン交換の一つの方法としては、リチウ
ムイオンを含む溶融塩にガラスを浸漬し、ガラスの転移
温度以下の温度でイオン交換を行わせる。例えば、ガラ
スを３００〜５００℃の温度の硝酸リチウム溶液に浸漬
してイオン交換させる。As one method of ion exchange, glass is immersed in a molten salt containing lithium ions, and ion exchange is performed at a temperature below the transition temperature of glass. For example, glass is immersed in a lithium nitrate solution at a temperature of 300 to 500 ° C. for ion exchange.
【００１２】[0012]
【作用】本発明は、リチウムイオンはガラス中のナトリ
ウムイオン及びカリウムイオンとイオン交換が可能であ
り、しかもナトリウムイオン及びカリウムイオンに比べ
てイオン半径が小さいことを利用したもので、その作用
は次のとおりである。The present invention utilizes the fact that lithium ions can be ion-exchanged with sodium ions and potassium ions in glass and have a smaller ionic radius than sodium ions and potassium ions. It is as follows.
【００１３】すなわち、リチウムイオンのイオン半径は
ナトリウムイオン及びカリウムイオンのイオン半径と比
べて小さく、従って占有容積が小さいので、ガラス中の
ナトリウムイオン又はカリウムイオンがリチウムイオン
と置換されると、ガラスに引っ張り応力が発生し、ガラ
ス表面に微細なクラックが生ずる。すると、このクラッ
ク内にリチウムイオンが入り込み、更にイオン交換が行
われて次々と新たな微細クラックが伝播して形成され
る。That is, since the ionic radius of lithium ions is smaller than the ionic radii of sodium ions and potassium ions, and therefore the occupied volume is small, when the sodium ions or potassium ions in the glass are replaced with lithium ions, the glass becomes Tensile stress occurs and minute cracks occur on the glass surface. Then, lithium ions enter into the cracks, ion exchange is further performed, and new fine cracks propagate and are formed one after another.
【００１４】このようなことを繰り返して、微細なクラ
ックが入った層の厚さがある程度厚くなると、その反応
層とベースガラスとの膨張率の差によって大きなクラッ
クが発生する。その大きなクラックによりリチウムイオ
ンが更に奥へと入り込み、反応層の厚さが厚くなってい
く。If the thickness of the layer containing fine cracks is increased to some extent by repeating the above process, large cracks are generated due to the difference in expansion coefficient between the reaction layer and the base glass. Due to the large cracks, lithium ions penetrate further into the interior, and the thickness of the reaction layer increases.
【００１５】温度が高いほどイオン交換の反応性が良
く、また反応時間を長くすればするほど反応層の厚さは
厚くなる。その反応層は微細な無数のクラックで形成さ
れるため、無数の微細クラックに光が乱反射してガラス
表面は乳白色に見える。また、大きなクラックが大理石
状ないし亀甲状の模様を現出する。ベースガラスが無色
透明である場合は勿論であるが、緑、茶、黒などのあり
とあらゆる色のガラスに適用でき、色付きの場合にはベ
ースガラスの色を淡く伴う乳白色を呈することができ
る。The higher the temperature, the better the ion exchange reactivity, and the longer the reaction time, the thicker the reaction layer. Since the reaction layer is formed by a myriad of minute cracks, light diffusely reflects on the myriad minute cracks and the glass surface looks milky white. In addition, a large crack reveals a marble-like or hexagonal pattern. Not only when the base glass is colorless and transparent, but it can be applied to glasses of all colors such as green, brown, and black, and when colored, it can have a milky white color accompanied by a light color of the base glass.
【００１６】ガラスの種類としては、ガラス中のナトリ
ウムイオン又はカリウムイオンとリチウムイオンとのイ
オン交換が行われる組成のものであれば適用できる。こ
の点、最も一般的なガラスであるソーダライムガラスが
イオン交換の反応性が良く、ガラスびんやガラス食器等
のソーダライムガラス製品に、その形状や色の如何を問
わず広範囲に適用できる。Any kind of glass can be used as long as it has a composition in which sodium ions or potassium ions in the glass are exchanged with lithium ions. In this respect, soda lime glass, which is the most common glass, has good ion exchange reactivity and can be widely applied to soda lime glass products such as glass bottles and glass tableware regardless of its shape and color.
【００１７】リチウムイオンを含む溶融塩としては、通
常、硝酸リチウム（融点が２６１℃）を使用するが、水
酸化リチウム（融点が４４５℃）のように融点がガラス
の転移温度（ソーダライムガラスで通常は５５０〜６０
０℃程度）より低いものであれば使用可能である。硝酸
リチウムを使用する場合、溶融温度は３００〜５００℃
程度、ガラスをこの溶融塩に浸漬させる時間は３０分か
ら１０時間程度で、ガラス製品の用途や現出させる模様
の程度などによって溶融温度及び浸漬時間を任意に調整
する。Lithium nitrate (melting point: 261 ° C.) is usually used as the molten salt containing lithium ions. However, like lithium hydroxide (melting point of 445 ° C.), the melting point is a glass transition temperature (in soda lime glass). Usually 550-60
Any material having a temperature lower than about 0 ° C.) can be used. When using lithium nitrate, the melting temperature is 300-500 ° C.
The time for immersing the glass in the molten salt is about 30 minutes to 10 hours, and the melting temperature and the immersing time are arbitrarily adjusted depending on the use of the glass product and the degree of the pattern to be exposed.
【００１８】なお、ガラスは硝酸リチウムを溶融後に浸
漬しても良く、また硝酸リチウム粉末と同時に加熱して
も良い。更に、リチウムイオンを含む蒸気で処理するこ
とを可能である。また、処理後のガラスは積極的に徐冷
しても、室温で放冷しても良い。The glass may be soaked after melting the lithium nitrate, or may be heated at the same time as the lithium nitrate powder. Furthermore, it is possible to treat with steam containing lithium ions. Further, the glass after the treatment may be gradually cooled gradually or may be left to cool at room temperature.
【００１９】[0019]
（実施例１）硝酸リチウム粉末を坩堝に入れ、電気炉で
３００〜４００℃に加熱して溶融させ、その溶融液中に
ソーダライムガラス成形品の灰皿を浸漬したところ、３
０分〜１時間経過後からガラス表面が乳白色となった。
溶融液の温度が３００℃程度であると３時間程度以上経
過しないと大きなクラックが発生しなかったが、４００
℃程度の場合には１時間半程度以上で大きなクラックが
生じた。その大きなクラックが蛇紋を呈したところで、
溶融液から取り出し、室温まで冷却した後、温水で洗っ
た灰皿の平面写真を図１、裏面写真を図２に示す。(Example 1) Lithium nitrate powder was put into a crucible, heated to 300 to 400 ° C in an electric furnace to be melted, and an ashtray of a soda lime glass molded product was dipped in the melt, and 3
The glass surface became milky after 0 minutes to 1 hour had elapsed.
When the temperature of the melt was about 300 ° C., no large cracks occurred until about 3 hours or more, but 400
When the temperature was about ° C, a large crack was generated in about one and a half hours. Where the big crack showed a serpentine pattern,
FIG. 1 shows a plan view of the ashtray washed with warm water after being taken out from the melt, cooled to room temperature, and FIG.
【００２０】（実施例２）ソーダライムガラスの小片を
実施例１と同様の硝酸リチウム溶融液に浸漬し、温度と
浸漬時間とを変えてガラスに生ずる反応層の厚さの推移
を調べた。図３は、そのとき使用した処理前の無色透明
のガラス小片と処理後の乳白色となったガラス小片とを
並べて示す写真である。また、図４は温度を３００℃、
３５０℃、４００℃と変え、それぞれにおける浸漬時間
に対する反応層の厚みの変化を線グラフにしたものであ
る。なお、同図において塗り潰した測定点は大きなクラ
ックが見られなかったところである。(Example 2) A small piece of soda lime glass was immersed in the same lithium nitrate melt as in Example 1, and the transition of the thickness of the reaction layer formed on the glass was examined by changing the temperature and the immersion time. FIG. 3 is a photograph showing the colorless and transparent glass pieces before the treatment and the milky glass pieces after the treatment, which were used at that time, side by side. In addition, in FIG. 4, the temperature is 300 ° C.
It is a line graph showing the change in the thickness of the reaction layer with respect to the immersion time at 350 ° C. and 400 ° C. In addition, in the figure, the measurement points filled in are the places where no large cracks were observed.
【００２１】（実施例３）緑色のソーダライムガラスの
小片を実施例１と同様の硝酸リチウム溶融液に浸漬し、
大きなクラックが蛇紋の模様を呈したところで取り出し
たところ、図５に示すように蛇紋の模様がベースガラス
の色である緑色を呈し、その他の部分が緑色が淡く残っ
た乳白色となった。(Example 3) A small piece of green soda lime glass was immersed in the same lithium nitrate melt as in Example 1,
When a large crack had a serpentine pattern, it was taken out. As shown in FIG. 5, the serpentine pattern had a green color which was the color of the base glass, and the other parts had a milky white color in which the green color remained pale.
【００２２】[0022]
【発明の効果】本発明によれば次のような効果がある。 ガラス表面をイオン交換によって乳白色又はそれに
近い色に変色できると同時に、更に大理石状（蛇紋）な
いし亀甲状の模様を呈するように装飾することができ、
自然の大理石のような高級感を出すことができる。The present invention has the following effects. The glass surface can be changed to a milky white color or a color close to it by ion exchange, and at the same time, it can be further decorated to have a marble (serpentine) or turtle shell pattern.
It can give a high-class feel like natural marble.
【００２３】 表面だけをイオン交換処理するだけで
装飾効果が得られるので、処理費用が廉価である。Since the decoration effect can be obtained only by subjecting only the surface to the ion exchange treatment, the treatment cost is low.
【００２４】 形状が複雑なガラス製品でもムラなく
一様に装飾でき、またベースガラスが無色透明である場
合は勿論のこと、緑、茶、黒などのありとあらゆる色の
ガラスに適用でき、色付きの場合にはベースガラスの色
を淡く伴う乳白色を呈することができる。[0024] Even if a glass product having a complicated shape can be uniformly decorated, the base glass is not only transparent and colorless, but can be applied to glass of all colors such as green, brown, and black, and is colored. Can have a milky white color with a light color of the base glass.
【００２５】 リチウムイオンを含む溶液の温度又は
浸漬時間を変えることにより、色相や模様の濃度・大き
さ等を調整することができる。By changing the temperature or the immersion time of the solution containing lithium ions, it is possible to adjust the hue and the density / size of the pattern.
【００２６】 最も一般的なガラスであるソーダライ
ムガラスに好適であるため、日常良く使用されているガ
ラス製品に広範囲に適用できる。Since it is suitable for soda lime glass, which is the most common glass, it can be applied to a wide range of glass products that are commonly used daily.
【図１】本発明の装飾方法で処理したソーダライムガラ
ス製品の平面図（写真）である。FIG. 1 is a plan view (photograph) of a soda lime glass product treated by the decoration method of the present invention.
【図２】同上の裏面図（写真）である。FIG. 2 is a back view (photograph) of the above.
【図３】処理前の無色透明のガラス小片と処理後の乳白
色となったガラス小片とを並べて示す平面図（写真）で
ある。FIG. 3 is a plan view (photograph) showing the colorless and transparent glass pieces before treatment and the milky glass pieces after treatment arranged side by side.
【図４】処理温度を変えてそれぞれにおける浸漬時間に
対する反応層の厚みの変化を示す線グラフである。FIG. 4 is a line graph showing changes in the thickness of the reaction layer with respect to the immersion time at various treatment temperatures.
【図５】緑色のソーダライムガラスの小片に対して本発
明を適用して得られた見本の平面図（写真）である。FIG. 5 is a plan view (photograph) of a sample obtained by applying the present invention to a small piece of green soda lime glass.
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【手続補正書】[Procedure amendment]
【提出日】平成５年１０月５日[Submission date] October 5, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図１[Name of item to be corrected] Figure 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図１】 [Figure 1]
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図２[Name of item to be corrected] Figure 2
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図２】 [Fig. 2]
【手続補正３】[Procedure 3]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図３[Name of item to be corrected] Figure 3
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図３】 [Figure 3]
【手続補正４】[Procedure amendment 4]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図５[Name of item to be corrected] Figure 5
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図５】 [Figure 5]
Claims (5)
をリチウムとイオン交換させてガラス表面に無数の微細
なクラックを生じさせることを特徴とするイオン交換に
よるガラスの装飾方法。1. A method for decorating glass by ion exchange, which comprises causing ion exchange of sodium and / or potassium in the glass with lithium to generate numerous minute cracks on the glass surface.
ックになるまでイオン交換を行うことを特徴とする請求
項１に記載のイオン交換によるガラスの装飾方法。2. The method for decorating glass by ion exchange according to claim 1, wherein ion exchange is carried out until the minute cracks become large cracks visible to the naked eye.
漬し、ガラスの転移温度以下の温度でイオン交換させる
ことを特徴とする請求項１に記載のイオン交換によるガ
ラスの装飾方法。3. The method for decorating glass by ion exchange according to claim 1, wherein the glass is immersed in a molten salt containing lithium ions, and the glass is ion-exchanged at a temperature not higher than the transition temperature of the glass.
チウム溶液に浸漬してイオン交換させることを特徴とす
る請求項３に記載のイオン交換によるガラスの装飾方
法。4. The method for decorating glass by ion exchange according to claim 3, wherein the glass is immersed in a lithium nitrate solution at a temperature of 300 to 500 ° C. for ion exchange.
１ないし４のいずれかに記載のイオン交換によるガラス
の装飾方法。5. The method for decorating glass by ion exchange according to claim 1, wherein the glass is soda lime glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7560192A JPH06219788A (en) | 1992-02-27 | 1992-02-27 | Method for decorating glass by ion exchange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7560192A JPH06219788A (en) | 1992-02-27 | 1992-02-27 | Method for decorating glass by ion exchange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06219788A true JPH06219788A (en) | 1994-08-09 |
Family
ID=13580892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7560192A Pending JPH06219788A (en) | 1992-02-27 | 1992-02-27 | Method for decorating glass by ion exchange |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06219788A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100463586B1 (en) * | 2000-08-31 | 2004-12-29 | 재단법인 포항산업과학연구원 | Method for preparing high refractive index glass bead by ion-exchange |
| JP2012519131A (en) * | 2009-02-26 | 2012-08-23 | コーニング インコーポレイテッド | Milk white glass forming method |
| JP2012216251A (en) * | 2011-03-31 | 2012-11-08 | Konica Minolta Advanced Layers Inc | Method for manufacturing glass substrate for magnetic information recording medium |
| JPWO2011078181A1 (en) * | 2009-12-22 | 2013-05-09 | 株式会社Ｇｓユアサ | Dielectric barrier discharge lamp and ultraviolet irradiation apparatus using the same |
| WO2014112446A1 (en) * | 2013-01-16 | 2014-07-24 | 旭硝子株式会社 | Housing containing white glass, method for manufacturing housing containing white glass, and portable electronic device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5413524A (en) * | 1977-07-04 | 1979-02-01 | Fuji Seikiyoushiyo Kk | Printed glass plate |
-
1992
- 1992-02-27 JP JP7560192A patent/JPH06219788A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5413524A (en) * | 1977-07-04 | 1979-02-01 | Fuji Seikiyoushiyo Kk | Printed glass plate |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100463586B1 (en) * | 2000-08-31 | 2004-12-29 | 재단법인 포항산업과학연구원 | Method for preparing high refractive index glass bead by ion-exchange |
| JP2012519131A (en) * | 2009-02-26 | 2012-08-23 | コーニング インコーポレイテッド | Milk white glass forming method |
| JPWO2011078181A1 (en) * | 2009-12-22 | 2013-05-09 | 株式会社Ｇｓユアサ | Dielectric barrier discharge lamp and ultraviolet irradiation apparatus using the same |
| JP2012216251A (en) * | 2011-03-31 | 2012-11-08 | Konica Minolta Advanced Layers Inc | Method for manufacturing glass substrate for magnetic information recording medium |
| WO2014112446A1 (en) * | 2013-01-16 | 2014-07-24 | 旭硝子株式会社 | Housing containing white glass, method for manufacturing housing containing white glass, and portable electronic device |
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