JP2011156471A - Surface cleaning method of decoration fitting for religion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To clean a layer of a gold plating without damaging when a passage of long years of a tangible entity for religion in which a silver or nickel plating is given to the surface of a copper bare metal, and a gold plating is given thereon produces a copper oxide which is rust of the bare metal on the surface of a decoration fitting, and to enable a recovery of a visual quality of the tangible entity, and religious value. <P>SOLUTION: A surface cleaning method of a decoration fitting for religion in which the silver or nickel plating 5 is given to the surface of the copper bare metal 4 and the gold plating 6 is given thereon is provided. The copper oxide 4a exposed on the surface of the gold plating 6 is reduced by a sulfur carboxylic acid. Prior to the reduction of the copper oxide 4a, organic fouling adhering to each surface of the gold plating 6 and the copper oxide 4a is cleaned with a cleaning agent 9. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is to reduce the copper oxide generated on the surface of the decorative metal fittings over the years of the religious tangible object, and to restore the appearance and religious value of the religious tangible object. The present invention relates to a method for cleaning the surface of a religious ornamental metal fitting.

  Examples of the tangible objects for religious use include floats (including dashi: bonito) and shrines (mikoshi), and the decorative metal fittings used for these are copper bullion in the same manner as the decorative metal fittings shown in Patent Document 1 below. In many cases, the surface is nickel-plated and the surface is gold-plated.

  And by the ornamental metal fitting which gave gold plating as mentioned above, the improvement of the external appearance of religious tangible thing and the improvement of religious value are aimed at.

Japanese Unexamined Patent Publication No. 7-173680

  By the way, the gold plating in the above-mentioned religious tangible decorative metal fittings is not related to industrial products such as electronic parts, but because it focuses on appearance and religious value, the thickness of this gold plating layer is: Compared with the industrial product having a thickness of about 0.5 to 5 μm, the thickness is about 0.05 μm. For this reason, usually, many pinholes are easily generated in the gold plating layer.

  Therefore, when many years have passed with respect to the religious tangible object, moisture such as rain water on the atmosphere side repeatedly passes through the pinhole and reaches the nickel plating layer repeatedly, and the nickel plating layer gradually becomes water. It melts and many cracks occur. Then, the moisture reaches the copper ingot through the crack of the nickel plating layer, and the surface of the ingot is oxidized and rust is generated by the moisture.

  Further, over the course of many years, the rust passes through the cracks in the nickel plating layer and the pinholes in the gold plating layer and reaches the surface of the gold plating layer, thereby fouling the surface of the decorative metal fitting. And when such pollution occurs, the above-mentioned religious tangible object is not preferable because the appearance may be lowered or the religious value may be lowered.

  Therefore, it is conceivable to remove the rust on the surface of the decorative metal and purify the surface of the decorative metal. However, in general, the rust is fixed to the gold-plated surface of the decorative metal fitting, and the gold-plated layer is extremely thin and low in strength as described above. Therefore, if the rust is simply removed from the surface of the decorative metal fitting for purification, the gold plating layer may be significantly damaged, and therefore the surface of the decorative metal fitting cannot be easily purified.

  The present invention has been made by paying attention to the above-described circumstances, and the object of the present invention is to provide a religious tangible object in which a surface of a copper bullion is plated with silver or nickel and the surface is plated with gold. After many years, when the surface of the decorative metal fitting is soiled with copper oxide, which is the rust of the above-mentioned metal, it is purified without damaging the gold-plated layer, and the appearance of religious tangible objects and religious Is to make the objective value recoverable.

The invention of claim 1 is a method for purifying the surface of a religious decorative metal fitting, wherein the surface of a copper ingot 4 is subjected to silver or nickel plating 5 and the surface thereof is subjected to gold plating 6.
A method of purifying the surface of a religious decorative metal fitting, characterized in that the copper oxide 4a exposed on the surface of the gold plating 6 is reduced with sulfur carboxylic acid.

  The invention of claim 2 is characterized in that, prior to the reduction of the copper oxide 4a, the organic deposits adhering to the surfaces of the gold plating 6 and the copper oxide 4a are purified with a cleaning agent 9. The method for purifying the surface of a religious decorative metal fitting according to claim 1.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

The invention of claim 1 is a method for purifying the surface of a religious ornamental metal fitting, wherein the surface of a copper ingot is subjected to silver or nickel plating, and the surface thereof is subjected to gold plating,
The copper oxide exposed on the surface of the gold plating is reduced with sulfur carboxylic acid.

  Here, the substance produced by the reduction reaction is a more stable substance than the sulfur carboxylic acid, and does not react with copper itself such as redissolving, and therefore can be easily detached from the surface of the gold plating.

  Therefore, when the surface of the decorative metal fitting is soiled by copper oxide, which is rust of the bullion, due to the passage of the tangible object for many years, the gold plating layer can be obtained by using the surface purification method described above. It is easy to restore the appearance and religious value of religious tangible objects by purifying them without damaging them.

  According to a second aspect of the present invention, prior to the reduction of the copper oxide, organic deposits adhering to the surfaces of the gold plating and the copper oxide are purified with a cleaning agent.

  For this reason, the reduction | restoration effect | action of the copper oxide by the said sulfur carboxylic acid can be smoothly and highly accurate, without being disturbed by the said deposit | attachment. Therefore, the surface of the decorative fitting can be effectively purified.

It is a front view of the float as an example of the tangible for religious purposes.

  With respect to the surface purification method for religious ornamental metal fittings of the present invention, the surface of a copper bullion is plated with silver or nickel, and the religious tangible object with gold plating on the surface has passed many years, The purpose of purifying the gold-plated layer without damaging it when the surface is soiled by copper oxide, which is rust of the above-mentioned bullion, so that the appearance and religious value of religious tangible objects can be restored. In order to realize the above, the form for carrying out the present invention is as follows.

  That is, a method for purifying a surface of a religious decorative metal fitting in which a surface of a copper ingot is subjected to silver or nickel plating and the surface thereof is subjected to gold plating, wherein the copper oxide exposed on the surface of the gold plating is treated with sulfur carboxylic acid. It is supposed to reduce with acid.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  In the figure, reference numeral 1 denotes a religious tangible object exemplified by a float. The base 2 of the tangible object 1 is made of wood, and a religious ornamental fitting 3 is attached to each part of the surface of the base 2. The religious tangible object 1 is a shrine, a shrine, a Buddhist temple, a Buddhist image, a Buddhist altar, a Buddhist instrument, etc., in addition to the float.

  The decorative metal fitting 3 is obtained by applying nickel plating 5 to the surface of a copper metal 4 and applying gold plating 6 to the surface of the nickel plating 5. The metal 4 is made of copper, brass (brass), phosphor bronze, or the like. The nickel plating 5 may be silver plating instead.

  The thickness of the gold plating 6 is made thinner than the thickness of the nickel plating 5 (or silver plating) and is about 0.03 to 0.1 μm. Each of the above platings may be electroplating. Alternatively, the above-described metal 4 may be placed in a nickel, silver, and gold solution and adhered to the surface of the metal 4.

  When many years have passed for the religious tangible object 1, as explained in the prior art, rust due to oxidation of the metal 4 usually reaches the surface of the decorative metal fitting 3 of the religious tangible object 1. Then, the surface of the decorative metal fitting 3 is soiled. The rust of the metal 4 is copper oxide 4a, and is generally a mixture of black copper oxide (CuO), green-blue copper carbonate, and copper hydroxide.

  A method for purifying the surface of the decorative metal fitting 3 will be described in which the copper oxide 4a contaminating the surface of the decorative metal fitting 3 is removed and the surface of the decorative metal fitting 3 is purified.

  First, the organic deposits adhering to the surfaces of the gold plating 6 and the copper oxide 4a of the decorative metal fitting 3 are gently rubbed with a soft material 10 containing a liquid cleaning agent 9 and wiped off. To purify. In this case, the external force applied to the surface of the gold plating 6 for wiping off the flexible material 10 is made as small as possible. Next, the surfaces of the gold plating 6 and the copper oxide 4a are rinsed with warm water and further purified.

  The organic deposits are, for example, petroleum-based ones such as oil smoke, and aliphatic ones such as animal and vegetable oils.The detergent 9 is a commercially available neutral detergent, but it can be diluted with warm water. Those that are warmed are preferred. Further, the flexible material 10 is porous and liquid-absorbing, and for example, a cloth such as sponge or non-woven fabric is overlapped or made into a lump shape.

  Next, the copper oxide 4a exposed on the surface of the gold plating 6 is reduced with dithiocarboxylic acid (RC (= S) SH) which is a kind of sulfur carboxylic acid.

  Here, the chemical reaction formula of the above-described copper oxide (CuO) and dithiocarboxylic acid is described below.

  The dithiocarboxylate in the above formula, which is a substance generated by the reduction reaction, is a more stable substance than the dithiocarboxylic acid, and does not react with copper itself, such as redissolving. It can be easily detached. Therefore, next, the surface of the gold plating 6 is washed with water or a solvent to remove the dithiocarboxylate from the surface of the gold plating 6 and purify it.

  Therefore, when the above-mentioned surface purification method is used in the case where the surface of the decorative metal fitting 3 is soiled by the copper oxide 4a which is the rust of the bullion 4 due to the passage of the tangible object 1 for many years, The appearance of the religious tangible object 1 and the religious value can be restored by purifying the gold-plated layer 6 without damaging it.

  Prior to the reduction of the copper oxide 4a, the organic deposits adhering to the surfaces of the gold plating 6 and the copper oxide 4a are purified by the cleaning agent 9.

  For this reason, the reduction action of the copper oxide 4a by the dithiocarboxylic acid, which is a kind of the sulfur carboxylic acid, can be smoothly and accurately performed without being obstructed by the deposits. Therefore, the surface of the decorative fitting 3 can be effectively purified.

  The cleaning agent 9 may be a solvent such as alcohol or ligroin.

DESCRIPTION OF SYMBOLS 1 Religious tangible thing 2 Base 3 Decorative metal fittings 4 Metal 4a Copper oxide 5 Nickel plating 6 Gold plating 9 Cleaning agent 10 Flexible material

Claims (2)

A method for purifying the surface of a religious ornamental fitting, wherein the surface of a copper bullion is plated with silver or nickel, and the surface thereof is plated with gold,
A method for purifying the surface of a religious ornament, wherein the copper oxide exposed on the surface of the gold plating is reduced with sulfur carboxylic acid.   The religious decorative metal fitting according to claim 1, wherein, prior to the reduction of the copper oxide, organic deposits adhering to the surfaces of the gold plating and the copper oxide are purified with a cleaning agent. Surface purification method.

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