JP3694235B2 - Clock dial - Google Patents

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Publication number
JP3694235B2
JP3694235B2 JP2000375806A JP2000375806A JP3694235B2 JP 3694235 B2 JP3694235 B2 JP 3694235B2 JP 2000375806 A JP2000375806 A JP 2000375806A JP 2000375806 A JP2000375806 A JP 2000375806A JP 3694235 B2 JP3694235 B2 JP 3694235B2
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Japan
Prior art keywords
film
metal plate
deposited film
colorant
deposition
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Expired - Lifetime
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JP2000375806A
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Japanese (ja)
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JP2002181958A (en
Inventor
正昭 佐藤
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河口湖精密株式会社
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Description

【0001】
【発明の属する技術分野】
本発明は、金属板からなる基板に着色を施した時計用文字板に関するものであり、特に、その耐蝕性を向上させるものに関する。
【0002】
【従来の技術】
従来より、金属板を基板とする時計用文字板において、その金属板からなる基板に着色を施すことが行われている。このように金属板に着色を施すと、金属光沢と色彩とが相まって、鮮やかで綺麗な色を出すことができる。中でも、ブルーに着色したブルー着色文字板は、高級感があるものとして人気が高い。
【0003】
上記のようなブルー着色文字板は、金属着色液に金属板を浸漬させることにより着色したものであり、その金属着色液の一つとしてチオ硫酸ナトリウムと酢酸鉛を主成分とするものがある。
【0004】
【発明が解決しようとする課題】
上記のような金属着色液を用いて着色したブルー着色文字板は、大変綺麗な色調を有するが、その一方では退色が起き易く、耐蝕性が悪いという問題があった。
【0005】
本発明は、上記従来技術の課題に鑑みなされたもので、耐蝕性を向上させたブルー色調を有する時計用文字板を提供するものである。
【0006】
【課題を解決するための手段】
本発明の時計用文字板は、請求項1乃至請求項3に示すように、金属板又は表面にメッキを施した金属板からなる基板と、着色剤にて前記基板の表面に形成される析出膜と、該析出膜の上に形成される酸化シリコンの蒸着膜で成り、前記析出膜を形成する着色剤の組成液は、チオ硫酸ナトリウムと酢酸鉛と酒石酸水素カリウムで成ることを特徴としている。この時計用文字板における前記蒸着膜は1500〜2000Åの厚みを有している。また、この時計用文字板における前記着色剤はチオ硫酸ナトリウムと酢酸鉛と酒石酸水素カリウムを主成分としている。更に、この時計用文字板における前記析出膜はブルー色を有している。
【0007】
また、上記時計用文字板は、請求項2および請求項3で示す、前記蒸着膜の上に形成されるクリアー塗膜を有している。この前記クリアー塗膜は少なくとも10μmの厚みを有するものとなっている。さらに、請求項3で示すように、前記クリアー塗膜面の上面は研磨が施して成る。
【0008】
【発明の実施の形態】
本発明の時計用文字板においては、着色剤にて基板の表面に形成した析出膜の上に、酸化シリコン(SiO2)の蒸着膜を形成している。この蒸着膜は、硬く、水分の侵入を防ぐため、析出膜の変色や退色を防ぎ、耐蝕性を大幅に向上させることができる。
【0009】
また、この蒸着膜は1500〜2000Åの厚みを有していれば、十分な耐蝕性を確保することができ、更に、その上にクリアー塗装を形成することで表面の汚れを防止したり印刷を容易にすることができる。
【0010】
【実施例】
以下、本発明の実施例を説明する。図1は本発明の一実施例に係る時計用文字板の断面部分図である。1は真鍮等の金属板又は表面にメッキを施した真鍮等の金属板からなる基板である。図1に示す基板1は、金属板1aの表面にメッキ層1bを形成したものである。
【0011】
2は基板1の表面(本実施例においてはメッキ層1bの上)に着色剤によって形成される析出膜で、前記析出膜を構成させる着色剤の組成液は、チオ硫酸ナトリウムと酢酸鉛と酒石酸水素カリウムから成る。この着色剤組成液により析出膜2は装飾性の高い色を有しており、本実施例においてはブルー色(青色)を有するものとなっている。
【0012】
3は析出膜2の上に形成される酸化シリコンからなる蒸着膜である。この蒸着膜3は、析出膜2の退色を防ぎ、耐蝕性を向上させるために設けられている。また、蒸着膜3の厚みは、後述する耐蝕性試験に基づいて1500〜2000Åの厚みに設定されている。
【0013】
4はウレタン樹脂からなるクリアー塗膜である。本実施例における時計用文字板を実際に使用する際には、その表面に指標やマーク等が印刷等で形成される。このクリアー塗膜4は、このような後工程における印刷を施し易くすると共に蒸着膜3の表面が汚れることを防ぐために設けられている。従って、このクリアー塗膜4の厚みは10μm以上に設定される。これより薄いと表面を研磨したときに研磨されない部分も発生してムラが生じ、外観品質を悪くする。また、このクリアー塗膜は耐蝕性に大きく影響を及ぼすものではないが、更に良くする方向に働く。
【0014】
次に、上記実施例における時計用文字板の蒸着膜3の厚みを変化させて耐蝕性を調べる試験を行った場合の結果について説明する。ここで行った耐蝕性試験は、サンシャインウェザーメータのウエット試験であり、この試験を100時間行うことにより耐蝕性を確認し、表1に示すような結果を得た。
【0015】
【表1】

Figure 0003694235
【0016】
表1に示す結果から明らかなように、蒸着膜3の厚みを1500〜2000Åに設定した場合には析出膜2の変色は認められず、十分な耐蝕性を有していることが確認された。これは、蒸着膜3を設けることにより気化水等の通気性がなくなり、析出膜2が水分や大気にさらされて退色等の変化を起こすことがなくなるためである。
【0017】
一方、本実施例における析出膜2の色調をブルーに設定しているが、この色調を得るには次のような着色条件に設定することを要する。即ち、チオ硫酸ナトリウム240g/l、酢酸鉛25g/l、酒石酸水素カリウム25g/lの組成液を40〜60℃に加温した着色液内に、基板1を約3分浸漬する。この着色液はブルー着色には好適であり、浸漬時間によって茶(約1分)、紫(約2分)、青(約3〜3.5分)、薄青と着色色調が変わって行く。中でも青色に着色する際の浸漬時間は比較的長い。このため、浸漬時間が短い茶や紫等のように、浸漬時間の微妙な長短で色がバラツクことがなく、浸漬時間の管理が容易であり、着色の色合いをバラツキなく管理することができ、非常に綺麗なブルー色を得ることができる。
【0018】
また、この着色液は、金、銀、銅、ニッケル、コバルト等、ほとんどの金属に着色することができるので、時計用文字板に使用される基板1の金属板1aやメッキ層1bのほとんど全てに着色を施すことが可能である。
【0019】
尚、本実施例においてはクリアー塗膜4を設けたものを図示し且つ試験に使用したが、表1にも示すように、耐蝕性に関しては蒸着膜3の厚みが大きく影響していることが確認できる。従って、クリアー塗膜4を設けずに蒸着膜3だけで耐蝕性を向上させることができ、クリアー塗膜4を省くことも可能である。
【0020】
【発明の効果】
上記本発明によれば、着色剤による析出膜の上に酸化シリコンの蒸着膜を設け、該蒸着膜は1500〜2000Åの厚みを有することで、析出膜が直接水分や大気にさらされることを防ぎ、耐蝕性を大幅に向上させることができる。また、前記析出膜を構成させる着色剤は、チオ硫酸ナトリウムと酢酸鉛と酒石酸水素カリウムとから成る組成液で設けられることで、前記析出膜は着色時のブルー色の浸漬時間の管理時間幅が長いことを特徴とし、浸漬時間の管理が容易であり、着色の色合いをバラツキなく管理することができ、非常に綺麗なブルー色を得ることができることを特徴としている。また、前記蒸着膜の上に形成されるクリアー塗膜は、前記蒸着膜の汚れを防止し、後工程での印刷を容易にすることができ、耐蝕性をさらに良くする方向に働く効果がある。
【図面の簡単な説明】
【図1】本発明の一実施例に係る時計用文字板を示す断面部分図である。
【符号の説明】
1 基板
1a 金属板
1b メッキ層
2 析出膜
3 蒸着膜
4 クリアー塗膜[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a timepiece dial in which a substrate made of a metal plate is colored, and more particularly, to an item that improves its corrosion resistance.
[0002]
[Prior art]
Conventionally, in a timepiece dial having a metal plate as a substrate, the substrate made of the metal plate is colored. When the metal plate is colored in this way, the metallic luster and color can be combined to produce a vivid and beautiful color. Among them, blue colored dials colored blue are popular as having a high-class feeling.
[0003]
The blue colored dial as described above is colored by immersing a metal plate in a metal coloring liquid, and one of the metal coloring liquids is mainly composed of sodium thiosulfate and lead acetate.
[0004]
[Problems to be solved by the invention]
A blue-colored dial plate colored with the above-described metal coloring liquid has a very beautiful color tone, but on the other hand, there is a problem that fading easily occurs and corrosion resistance is poor.
[0005]
The present invention has been made in view of the above-mentioned problems of the prior art, and provides a timepiece dial having a blue color tone with improved corrosion resistance.
[0006]
[Means for Solving the Problems]
The timepiece dial of the present invention comprises a substrate made of a metal plate or a metal plate plated on the surface, and a precipitate formed on the surface of the substrate with a colorant, as shown in claims 1 to 3. The film is composed of a deposited film of silicon oxide formed on the deposited film , and the colorant composition liquid forming the deposited film is composed of sodium thiosulfate, lead acetate, and potassium hydrogen tartrate. . The deposited film in the timepiece dial has a thickness of 1500 to 2000 mm . The colorant in the timepiece dial is mainly composed of sodium thiosulfate, lead acetate and potassium hydrogen tartrate . Further, the deposited film in the timepiece dial has a blue color.
[0007]
The timepiece dial has a clear coating film formed on the vapor deposition film as shown in claim 2 and claim 3 . The clear coating film has a thickness of at least 10 μm. Furthermore, as shown in claim 3, the upper surface of the clear coating film surface is polished.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the timepiece dial of the present invention, a deposited film of silicon oxide (SiO2) is formed on the deposited film formed on the surface of the substrate with a colorant. Since this deposited film is hard and prevents moisture from entering, the deposited film can be prevented from discoloring or fading and the corrosion resistance can be greatly improved.
[0009]
In addition, if the deposited film has a thickness of 1500 to 2000 mm , sufficient corrosion resistance can be secured, and further, a clear coating is formed thereon to prevent surface contamination and printing. Can be easily.
[0010]
【Example】
Examples of the present invention will be described below. FIG. 1 is a partial sectional view of a timepiece dial according to one embodiment of the present invention. Reference numeral 1 denotes a substrate made of a metal plate such as brass or a metal plate such as brass whose surface is plated. A substrate 1 shown in FIG. 1 is obtained by forming a plating layer 1b on the surface of a metal plate 1a.
[0011]
Reference numeral 2 denotes a deposited film formed with a colorant on the surface of the substrate 1 (on the plating layer 1b in this embodiment), and the composition liquid of the colorant constituting the deposited film is sodium thiosulfate, lead acetate and tartaric acid. Consists of potassium hydrogen. With this colorant composition liquid, the deposited film 2 has a color with high decorativeness, and in this embodiment, it has a blue color (blue).
[0012]
Reference numeral 3 denotes a deposited film made of silicon oxide formed on the deposited film 2. The vapor deposition film 3 is provided to prevent the deposition film 2 from fading and improve the corrosion resistance. Moreover, the thickness of the vapor deposition film 3 is set to the thickness of 1500-2000 mm based on the corrosion resistance test mentioned later.
[0013]
4 is a clear coating film made of urethane resin. When the timepiece dial in the present embodiment is actually used, an index, a mark, or the like is formed on the surface by printing or the like. The clear coating film 4 is provided for facilitating printing in such a post process and for preventing the surface of the vapor deposition film 3 from becoming dirty. Accordingly, the thickness of the clear coating film 4 is set to 10 μm or more. If the thickness is smaller than this, a portion that is not polished occurs when the surface is polished, resulting in unevenness and poor appearance quality. Also, this clear coating does not greatly affect the corrosion resistance, but it works in the direction of further improvement.
[0014]
Next, a description will be given of results when a test for examining the corrosion resistance is performed by changing the thickness of the vapor deposition film 3 of the timepiece dial in the above embodiment. The corrosion resistance test conducted here was a wet test of a sunshine weather meter. The corrosion resistance was confirmed by conducting this test for 100 hours, and the results shown in Table 1 were obtained.
[0015]
[Table 1]
Figure 0003694235
[0016]
As is clear from the results shown in Table 1, when the thickness of the vapor deposition film 3 is set to 1500 to 2000 mm , no discoloration of the deposited film 2 is observed, and it has been confirmed that the film has sufficient corrosion resistance. . This is because by providing the vapor deposition film 3, the air permeability of vaporized water or the like is lost, and the deposited film 2 is not exposed to moisture or the air, causing a change such as fading.
[0017]
On the other hand, although the color tone of the deposited film 2 in this embodiment is set to blue, it is necessary to set the following coloring conditions to obtain this color tone. That is, the substrate 1 is immersed for about 3 minutes in a coloring liquid in which a composition liquid of sodium thiosulfate 240 g / l, lead acetate 25 g / l, and potassium hydrogen tartrate 25 g / l is heated to 40 to 60 ° C. This coloring liquid is suitable for blue coloring, and the color tone changes from brown (about 1 minute), purple (about 2 minutes), blue (about 3 to 3.5 minutes), and light blue depending on the immersion time. Above all, the immersion time when coloring blue is relatively long. For this reason, like brown and purple with a short immersion time, the immersion time is delicate and the color does not vary, the immersion time is easy to manage, and the coloring shade can be managed without variation, A very beautiful blue color can be obtained.
[0018]
Moreover, since this coloring liquid can color most metals, such as gold | metal | money, silver, copper, nickel, cobalt, almost all of the metal plate 1a and the plating layer 1b of the board | substrate 1 used for a dial for timepieces. Can be colored.
[0019]
In this example, the one provided with the clear coating film 4 is shown and used for the test. As shown in Table 1, the thickness of the deposited film 3 has a great influence on the corrosion resistance. I can confirm. Therefore, the corrosion resistance can be improved only by the vapor deposition film 3 without providing the clear coating film 4, and the clear coating film 4 can be omitted.
[0020]
【The invention's effect】
According to the present invention, the deposited film of silicon oxide is provided on the deposited film made of the colorant, and the deposited film has a thickness of 1500 to 2000 mm, thereby preventing the deposited film from being directly exposed to moisture or the atmosphere. Corrosion resistance can be greatly improved. Further, the colorant constituting the deposited film is provided by a composition liquid composed of sodium thiosulfate, lead acetate, and potassium hydrogen tartrate, so that the deposited film has a control time width of a blue immersion time during coloring. It is characterized by being long, and the dipping time can be easily managed, and the tint of the coloring can be managed without variation, and a very beautiful blue color can be obtained. Moreover, the clear coating film formed on the vapor deposition film can prevent the vapor deposition film from being soiled, can facilitate printing in a subsequent process, and has an effect of improving the corrosion resistance. .
[Brief description of the drawings]
FIG. 1 is a partial sectional view showing a timepiece dial according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Substrate 1a Metal plate 1b Plating layer 2 Precipitation film 3 Deposition film 4 Clear coating film

Claims (5)

金属板又は表面にメッキを施した金属板からなる基板と、着色剤にて前記基板の表面に形成される析出膜と、該析出膜の上に形成される酸化シリコンの蒸着膜で成り、前記蒸着膜は1500〜2000Åの厚みを有し、前記析出膜は、チオ硫酸ナトリウムと酢酸鉛と酒石酸水素カリウムとから成る組成液の着色剤で設けられていることを特徴とする時計用文字板。A metal plate or a substrate made of a metal plate plated on the surface, a deposition film formed on the surface of the substrate with a colorant, and a silicon oxide vapor deposition film formed on the deposition film , A timepiece dial , wherein the deposited film has a thickness of 1500 to 2000 mm, and the deposited film is provided with a colorant of a composition liquid comprising sodium thiosulfate, lead acetate, and potassium hydrogen tartrate . 金属板又は表面にメッキを施した金属板からなる基板と、着色剤にて前記基板の表面に形成される析出膜と、該析出膜の上に形成される酸化シリコンの蒸着膜と、該蒸着膜の上に形成されるクリアー塗膜で成り、前記蒸着膜は1500〜2000Åの厚みを有し、前記析出膜は、チオ硫酸ナトリウムと酢酸鉛と酒石酸水素カリウムとから成る組成液の着色剤で設けられていることを特徴とする時計用文字板。A substrate made of a metal plate or a metal plate plated on the surface, a deposition film formed on the surface of the substrate with a colorant, a silicon oxide deposition film formed on the deposition film, and the deposition It consists of a clear coating film formed on the film, the deposited film has a thickness of 1500 to 2000 mm, and the deposited film is a colorant of a composition liquid consisting of sodium thiosulfate, lead acetate and potassium hydrogen tartrate. A timepiece dial characterized by being provided. 金属板又は表面にメッキを施した金属板からなる基板と、着色剤にて前記基板の表面に形成される析出膜と、該析出膜の上に形成される酸化シリコンの蒸着膜と、該蒸着膜の上に形成されるクリアー塗膜と、該クリアー塗膜の上面は研磨が施されて成り、前記蒸着膜は1500〜2000Åの厚みを有し、前記析出膜は、チオ硫酸ナトリウムと酢酸鉛と酒石酸水素カリウムとから成る組成液の着色剤で設けられていることを特徴とする時計用文字板。A substrate made of a metal plate or a metal plate plated on the surface, a deposition film formed on the surface of the substrate with a colorant, a silicon oxide deposition film formed on the deposition film, and the deposition A clear coating film formed on the film, and an upper surface of the clear coating film are polished, the deposited film has a thickness of 1500 to 2000 mm, and the deposited film includes sodium thiosulfate and lead acetate. A dial for a timepiece, characterized by being provided with a colorant of a composition liquid consisting of water and potassium hydrogen tartrate. 前記析出膜はブルー色を有することを特徴とする請求項1乃至3のいずれかに記載の時計用文字板。The timepiece dial according to claim 1, wherein the deposited film has a blue color. 前記クリアー塗膜は少なくとも10μmの厚みを有することを特徴とする請求項2乃至3記載の時計用文字板。4. The timepiece dial according to claim 2, wherein the clear coating film has a thickness of at least 10 [mu] m.
JP2000375806A 2000-12-11 2000-12-11 Clock dial Expired - Lifetime JP3694235B2 (en)

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