JP2004091908A - Alloy foil or foil intermediate and production method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide foil or a foil intermediate made of a gold-platinum alloy in which decorative effect can be maintained over a long period without undergoing discoloration, and the reduction of cost in decoration can be attained, and to provide a production method therefor. <P>SOLUTION: The foil is produced from an alloy obtained by using gold as the main component, and blending platinum therein. The alloy is subjected to a sheet metal production stage and a foil intermediate production stage to produce the foil intermediate made of the alloy. Alternatively, the alloy is subjected to a sheet metal production stage, a foil intermediate production stage and a foiling stage to produce foil made of the alloy. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
[Industrial applications]
The present invention relates to an alloy foil or a supernatant used for decorating religion-related facilities and articles, arts and crafts, and the like, and a method for producing the same.
[0002]
[Prior art]
Conventionally, for decoration of arts and crafts, gold foil, silver foil, copper foil, tin foil, aluminum foil, copper-zinc alloy foil called so-called foil, platinum foil, and so-called fumigation or the like, Various foils such as colored foils are used, but gold foils are mainly used from the viewpoint of decorative effects and the like.
[0003]
The gold foil is 24 gold foil, gold, silver, and copper, which are 98.91%, 0.49%, and 0.59% by weight of 23.74 gold. So-called gold foil No. 1 color, consisting of 97.66%, 1.35%, 0.97% of 23.44 gold by weight, and also 96.72% by weight of gold, silver and copper, 2.60%, 0.67% of 23.21 gold, so-called gold foil No. 2 color, also with gold, silver, copper of 95.79%, 3.53%, 0.67% of 22% by weight 99. gold, so-called gold leaf No. 3, also gold, silver and copper in weight percentage of 94.43%, 4.90%, 0.66% 22.66 gold, so-called gold leaf No. 4 The color also consists of 90.34%, 9.03%, 0.63% of 21.68% by weight of gold, silver and copper, 21.68 gold, so-called gold leaf plum color, also 75% by weight of gold and silver. 3%, 24.46% 18.12 gold, so-called gold leaf three-step color, also gold, silver, 58.82% by weight%, 41.17% 14.12% 14.12 gold, so-called gold leaf constant color, Are known, and are properly used depending on the application. As can be seen from this, most gold foils are made from gold-silver-copper alloys or gold-silver alloys. Of these gold leafs, the gold leaf is the most easily manufactured and the demand is high, so most of the gold leaf to be manufactured is the fourth color of gold leaf.
[0004]
Other than gold foil, silver foil, copper foil, tin foil, aluminum foil, platinum foil, and so-called colored foils obtained by subjecting them to fumigation or the like are manufactured from pure silver, pure copper, pure aluminum, and pure platinum.
[0005]
All foils such as gold foil, silver foil, copper foil, tin foil, aluminum foil, copper-zinc alloy foil called so-called foil, platinum foil, and so-called colored foil, which are processed by fumigation etc., are gold foil In the same way as described above, it is manufactured through a rolling process, a supernatant manufacturing process, and a foil stamping process.
[0006]
By the way, in recent years, discoloration of foil has become a problem. In severe cases, discoloration of the foil less than 5 years after manufacture has also been reported. Discoloration is a problem in gold foil other than 24-gold gold foil, silver foil, copper foil, tin foil, aluminum foil, western foil, and color foil, but the 24-gold foil and 100% platinum foil are discolored. There is no report.
[0007]
From this, it is presumed that the cause of the discoloration of the foil is mainly due to sulfuration and oxidation of components such as silver and copper in the foil.
[0008]
However, 24 gold foil, which is not discolored, requires a high level of technology in the foil manufacturing process because 24 gold is very soft, and the foil stamping paper interposed between them is severely damaged. Also, 100% platinum foil, which is not discolored, is a material that is hard and has poor ductility, and requires a high level of skill in the foil manufacturing process. Paper is also severely damaged, so its production efficiency is very poor, labor costs are high, and the platinum material is too expensive to produce.
[0009]
[Problems to be solved by the invention]
Therefore, an object of the present invention is to solve the above-mentioned conventional problems, and it is possible to maintain the decorative effect for a long period of time without discoloration. An object of the present invention is to provide an alloy foil and a supernatant which can be reduced in cost and a method for producing the same.
[0010]
[Means for Solving the Problems]
The present invention has been made to achieve the above object, and the invention of claim 1 is an alloy foil or an intermediate product of a foil manufactured by an alloy containing gold as a main component and platinum mixed therein. The invention according to claim 2 is the alloy foil or supernatant according to claim 1, wherein gold is selected in the range of 97 to 99% by weight and platinum is selected in the range of 3 to 1% by weight. The invention of claim 1 is the alloy foil according to claim 1 or 2 formed to a thickness of 0.1 to 0.3 μm, and the invention of claim 4 is the invention according to claim 1 or 2 formed to a thickness of about 1.0 μm. The invention of claim 5, wherein the alloy supernatant is an alloy supernatant containing gold as a main component and platinum mixed with platinum, which is manufactured through a metal drawing process, a supernatant manufacturing process, and a foil stamping process. The invention according to claim 6 comprises gold as a main component and platinum on it. The present invention is a method for producing an alloy supernatant, which is produced by a combined alloy through a rolled metal production process and a supernatant production process. The method for producing an alloy foil or a supernatant according to claim 5 or 6, wherein the thickness is selected within a range of 1%. The invention according to claim 5 or 7 is a method for producing an alloy foil, wherein the invention of claim 9 is the method for producing an alloy supernatant according to claim 6 or 7, wherein the alloy foil is formed to a thickness of about 1 μm in the supernatant production step.
[0011]
As described above, the alloy adopted as the material for the foil or the supernatant is the gold for the gold leaf, the gold color No. 1, the gold color No. 2, the gold color No. 3, the gold color No. 4, and the gold color for the gold color. There are only silver-copper alloys, gold foil three-step colors, gold-silver alloys for gold foil coloring, and copper-zinc alloys for western foils. No foils or supernatants made of platinum-blended alloys are known. .
[0012]
A gold-silver-copper alloy or a gold-silver alloy is used for the material of the gold foil for approximately two reasons. The first is that, as described above, the advanced technology is required in the foil manufacturing process because 24K is very soft, and the foil stamping paper is severely damaged. Second, the cost can be reduced by mixing silver and copper or silver.
[0013]
The reason why alloys are not used for silver foil, copper foil, tin foil, and aluminum foil materials is that pure silver, pure copper, and pure aluminum used for these materials are inexpensive, and silver alloy, copper alloy, This is because it can be manufactured at a lower cost than when manufactured from a tin alloy or an aluminum alloy. The reason why the alloy is not used as the material for the platinum foil is that the platinum is not only too hard but also has poor ductility, and it is expected that the technical difficulties in the production process of the alloy foil containing platinum will increase, and the melting point of platinum is 1773１７. C is much higher than other materials such as 1063 ° C for gold, 961 ° C for silver, 1083 ° C for copper, and 419 ° C for zinc. It has been thought that it is difficult to produce an alloy containing platinum in the melting equipment, and it is considered difficult to obtain a stable and unique color tone such as for Western foil because of the strong tendency of platinum to whiten. And the fact that the price of platinum was so high that it was thought that the cost reduction effect could not be expected at all.
[0014]
However, according to the experiment of the inventor of the present invention, when the temperature of a melting vessel capable of heating to 1500 ° C. was raised to 1200 ° C. to melt gold, and platinum was added thereto, the reason was unknown. However, platinum was melted and an alloy of gold and platinum could be produced. From this, it was confirmed that there was no problem in the difference between the melting points of gold and platinum.
[0015]
Next, the inventor of the present invention conducted an experiment for producing a supernatant, which is an intermediate product of foil, from an alloy obtained by increasing the mixing ratio (weight ratio) of platinum in 1% increments. As a result, it was confirmed that the whitening progressed rapidly as the mixing ratio (weight ratio) of platinum increased. Specifically, when the blending ratio (weight ratio) of platinum is 1%, a foil having the same color tone as that of 24-gold can be obtained, and when the blending ratio (weight ratio) of platinum is 2 to 3%. Although the whitening progressed, a supernatant having the same color tone as the gold leaf No. 4 color to a supernatant having the same color tone as the gold leaf three-step color or the gold leaf constant color could be obtained. When the blending ratio (weight ratio) of platinum is further increased to 10%, the color tone of the obtained supernatant becomes a pale pink color close to that of platinum, and when the blending ratio is further increased, the color tone becomes platinum. Since no change was observed, it was confirmed that platinum had a strong tendency to whiten. From this, it is possible to substitute the conventional gold foil if the blending ratio (weight ratio) of platinum is in the range of 1 to 3%, and the blending ratio (weight ratio) of platinum exceeds this and is around 10%. In some cases, it is necessary to devise applications that use the color tone that changes depending on the compounding ratio. When the compounding ratio (weight ratio) of platinum approaches 20%, it does not change at all with the color tone of platinum. It was confirmed that the disadvantage of increasing the compounding ratio was poor, and the profit of increasing the mixing ratio was poor. This is the reason why the present invention contains gold as a main component and platinum as an auxiliary component.
[0016]
Also, at that time, it was confirmed that the alloy was harder to elongate as the mixing ratio (weight ratio) of platinum increased, because the platinum was not only hard but also poor in ductility. However, even if the mixing ratio (weight ratio) of platinum is increased, the alloying process of rolling the alloy into a sheet having a thickness of about 40 μm, the manufacturing process of the supernatant, which is an intermediate product of the foil having a thickness of about 1 μm, and In the foiling process of hammering the fines further to finish the foil to a thickness of about 0.1 to 0.3 µm, compared to the case of gold foil, the working time and the cooling time or the number of times are slightly increased. Yes, but it was not a big change.
[0017]
Furthermore, it was found that the high price of platinum can maintain the decoration effect over a long period of time because it does not discolor, so that the cost of decoration can be substantially reduced.
[0018]
One of the features of the alloy foil manufacturing method adopted in the present invention is that the alloy foil is manufactured through a rolled metal manufacturing process, a supernatant manufacturing process, and a foil stamping process, similarly to the manufacturing of a gold foil. The rolling process is a process in which gold and platinum are melted to produce a gold-platinum alloy, which is rolled into a sheet and then cut to produce a rolling. This is a step of producing a supernatant having a thickness of about 1 μm, which is an intermediate foil, by hammering. The foiling step is performed by further hammering the supernatant to a thickness of about 0.1 to 0.3 μm. This is the process of finishing into foil. When used to decorate religion-related facilities and supplies, arts and crafts, etc., it is necessary to use foil, but depending on the application, using a supernatant of about 1 μm thickness does not cause any problem. One of the features of the present invention is that the supernatant is produced through a rolled metal production process and a supernatant production process, similarly to the production of gold foil.
[0019]
The present invention provides a method for producing an alloy foil and an alloy supernatant, in which, when the blending ratio of platinum is low, the gold foil is the first color to be used in the process of producing a metal, in the process of producing a supernatant, and in the process of stamping. Alternatively, the working time is not so different from the manufacturing process of the gold-foil five-haired color, and the work content is not particularly difficult. However, if the mixing ratio of platinum is high and exceeds 10%, it becomes difficult to elongate, the working time becomes longer as compared with the first color of gold foil, and the number of cooling times in the middle may increase. In addition, more advanced technology is required in the supernatant production process and the foil stamping process, and it is inevitable that the stamping and damage will become more severe and the production efficiency will worsen.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described as follows.
[0021]
As described above, the method for producing an alloy foil adopted by the present invention includes a metal rolling production step, a supernatant production step, and a foil stamping step.
[0022]
In the rolling process, 99% by weight of gold and 1% by weight of platinum are put into a sufficiently heated kettle (1200 ° C) and melted to produce a gold-platinum alloy. It is rolled into a sheet and cut into 55 mm square to produce a rolled metal. Melting time is about 10 minutes, rolling time is about 1 hour, 3 times on the way.
[0023]
The supernatant production process is a process in which a sheet-like sheet metal having a thickness of about 40 μm is hammered to produce a supernatant, which is an intermediate foil having a thickness of about 1 μm. Hammering a pack of stacked materials and extending the same to the same size as the paper, and a hammering process of the rough gold, and a pack of stacked raw gold sandwiched between clear-cut paper It consists of a light-weight manufacturing process of punching and extending to the same size as clear-cut paper, and a heavy-duty manufacturing process of moving to a larger clear-cut paper and hammering and expanding. In the process of manufacturing rough gold, waste paper is used, and the required time is 1 hour and 30 minutes, and cooling is performed six times on the way. The light weight manufacturing process uses fresh paper, and the required time is 1 hour and 30 minutes and cooling is performed four times in the middle. Oeju's manufacturing process uses fresh paper and takes about one and a half hours to cool five times.
[0024]
The foiling process is a process in which the supernatant is further hammered into a foil having a thickness of 0.1 to 0.3 μm, and a foil called a booth obtained by cutting the supernatant into 60 mm square is sandwiched between booth papers. This is a process of hammering a pile of items and hammering the foil onto the main paper. The time required for the foiling process is about 3 hours.
[0025]
Thus, a gold-platinum alloy foil with 99% by weight of gold and 1% by weight of platinum was produced. A gold-platinum alloy foil of 98% by weight of gold and 2% by weight of platinum was also manufactured, but could be manufactured in exactly the same manner as the above-described metal-rolling manufacturing process, supernatant manufacturing process, and foil stamping process. The alloy foil with 1% platinum by weight was a gold foil with a color tone completely different from the 24-gold foil.
[0026]
Next, another embodiment of the present invention will be described. Gold is added by 90% by weight and platinum is added by 10% by weight and melted to produce a gold-platinum alloy. , Foiling process was performed. The contents of the work are as described in the above embodiment, but in the production process of the rolled metal, it took about 20 minutes for the melting time, and the rolling was smooth at first, but it became difficult to elongate as it became thinner. The number of times of rolling was increased by one to produce a rolled metal. Work time was not extended much. In the supernatant production process, the production process of the rough gold was not different from that of the above-described embodiment, but the light-duty production process and the heavy-duty production process each required 2 hours. The number of cooling in the middle was not changed in the light-weight manufacturing process, but increased by one in the heavy-weight manufacturing process. In the foiling process, there was no particular difference from the above embodiment, but as a whole, the foil was more likely to stick to the foiling paper such as haptron paper, and the work time was nearly doubled. The production efficiency was reduced as compared with the embodiment. The produced alloy foil was strongly affected by the whitening tendency of platinum and became a color close to platinum.
[0027]
【The invention's effect】
Since the alloy foil of the present invention is a gold-platinum alloy foil or a supernatant, it does not change its color due to sulfuration or oxidation, and thus does not deteriorate its decorative effect. No need. As a result, the cost of decoration can be reduced. By changing the mixing ratio (weight ratio) of platinum, foils or supernatants having various tastes can be obtained. In addition, compared to the conventional method for producing gold foil or supernatant, the method for producing the alloy foil or supernatant is inexpensive because no advanced technology is required and the foil stamping paper is not damaged. be able to.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a production process of an alloy foil or a supernatant of the present invention.

Claims (9)

An alloy foil or supernatant made of an alloy composed mainly of gold and mixed with platinum. 2. The alloy foil or supernatant of claim 1 wherein gold is selected in the range of 97-99% by weight and platinum is selected in the range of 3-1% by weight. 3. The alloy foil according to claim 1, which is formed to a thickness of 0.1 to 0.3 [mu] m. 3. The alloy supernatant according to claim 1, wherein the alloy supernatant is formed to a thickness of about 1.0 [mu] m. A method of manufacturing alloy foils using an alloy containing gold as a main component and platinum mixed therewith through a metal drawing process, a supernatant process, and a foil stamping process. A method of manufacturing an alloy supernatant, which is manufactured by using an alloy containing gold as a main component and platinum mixed therewith, through a rolled metal manufacturing process and a supernatant manufacturing process. 7. The method for producing an alloy foil or supernatant according to claim 5, wherein gold is selected in a range of 97 to 99% by weight and platinum is selected in a range of 3 to 1% by weight. The method for producing an alloy foil according to claim 5, wherein the foil is formed to a thickness of 0.1 to 0.3 μm in the foiling step. 8. The method for producing an alloy supernatant according to claim 6, wherein said supernatant is formed to a thickness of about 1 [mu] m.

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