CN110747471A - Method for processing color-changing enamel applied to metal surface - Google Patents
Method for processing color-changing enamel applied to metal surface Download PDFInfo
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- CN110747471A CN110747471A CN201911072896.3A CN201911072896A CN110747471A CN 110747471 A CN110747471 A CN 110747471A CN 201911072896 A CN201911072896 A CN 201911072896A CN 110747471 A CN110747471 A CN 110747471A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
- C23D5/06—Coating with enamels or vitreous layers producing designs or letters
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- 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
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
- C23D5/02—Coating with enamels or vitreous layers by wet methods
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D7/00—Treating the coatings, e.g. drying before burning
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- 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
- C03C2207/00—Compositions specially applicable for the manufacture of vitreous enamels
- C03C2207/10—Compositions specially applicable for the manufacture of vitreous enamels for copper, silver or gold
Abstract
The invention discloses a method for processing color-changing enamel applied to a metal surface, which comprises the following steps: manufacturing a pattern groove on the surface of the metal blank; based on the total mass proportion, mixing 15-23 wt% of silicon, 10-15 wt% of boron, 10-14 wt% of sulfur, 8-12 wt% of phosphorus, 20-30 wt% of organic pigment and 20-30 wt% of adhesive to prepare enamel glaze powder; adding temperature-sensitive color-changing materials and color fillers required by products into the enamel glaze powder and preparing the enamel glaze slurry; and filling the grooves of the metal blank pattern with enamel glaze slip for multiple times, and baking for multiple times until the precious gold blank grooves are completely filled with enamel. The invention promotes the release of the concentrated internal stress of the enamel glaze in the forming process through multiple times of filling, baking and cooling, and realizes a simple production process through step-by-step enamel adhesion, so that the enamel glaze is not easy to crack or produce a sandwich layer to cause separation after being cooled.
Description
Technical Field
The invention relates to the field of enamel artware, in particular to a method for processing color-changing enamel applied to a metal surface.
Background
The existing enamel product is applied to glass products and ceramic products, and the enamel is a composite artware obtained by coating crushed and ground enamel glaze on the surfaces of glass products and ceramic products which are manufactured by the process, drying, sintering and the like.
The enamel glaze mainly comprises quartz, feldspar, borax, fluorine and other raw materials which are properly mixed, various metallic pigments are added, the mixture is ground into powder, and then the mixture is sintered into a mixture of silicic acid compounds.
The difference of expansion coefficients between the glass and the ceramic products which take the metal pigment and the quartz high-melting-point silicon dioxide as main components is small, the glass and the ceramic products can be completely attached to the surfaces of the glass and the ceramic products after being directly fired, bright and beautiful colors are presented, and when the traditional high-temperature enamel glaze and temperature sensing material are directly applied to metal to form the color-changing enamel, the enamel surface which is directly produced is easy to crack, the yield is low and the batch production cannot be realized due to the fact that the expansion coefficients generate large internal stress and the internal stress is concentrated and cannot be released due to the constraint of a metal groove when the enamel material and different metals are directly processed and formed through the processes of baking, cleaning and the like.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method for processing color-changing enamel applied to a metal surface, which is to increase the adhesion between the enamel glaze and the metal surface, and perform multiple filling and baking to gradually form the enamel and release the internal stress, so as to solve the problem of surface cracking when the enamel pigment is directly applied to different metals, thereby improving the yield of the color-changing enamel in the mass production process.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a method for processing color-changing enamel applied to a metal surface comprises the following steps:
manufacturing a pattern groove on the surface of the metal blank;
based on the total mass proportion, mixing 15-23 wt% of silicon, 10-15 wt% of boron, 10-14 wt% of sulfur, 8-12 wt% of phosphorus, 20-30 wt% of organic pigment and 20-30 wt% of adhesive to prepare enamel glaze powder;
the enamel glaze powder is added with temperature-sensitive color-changing materials and color fillers required by products and is prepared into enamel glaze slip.
And filling the grooves of the metal blank pattern with enamel glaze slip for multiple times, and baking for multiple times until the precious gold blank grooves are completely filled with enamel.
Further, the manufacturing of the pattern groove on the surface of the metal blank specifically comprises the steps of:
pre-manufacturing a tungsten steel wire hooking cutter;
and hooking parallel groove positions on the surface of the metal blank by a tungsten steel wire hooking cutter.
Further, the specific steps of adding the temperature-sensitive color-changing material and the color filler required by the product into the enamel glaze powder to prepare the enamel glaze slurry are as follows:
adding temperature-sensitive color-changing materials and color fillers required by products into the enamel glaze powder and stirring uniformly;
and (5) vacuumizing to obtain the bubble-free enamel glaze slip.
Further, the specific mass ratio of the enamel glaze slurry prepared by adding the temperature-sensitive color-changing material and the color filler required by the product into the enamel glaze powder is as follows:
enamel glaze powder: color filler required for the product: temperature sensitive color change material 6: 2.2: 1.8.
further, the specific steps of filling the metal blank pattern groove with enamel glaze slip for multiple times and baking the metal blank pattern groove for multiple times until the enamel completely fills the precious gold blank groove include:
uniformly filling enamel glaze slip into the groove of the metal blank, putting the metal blank into an oven for primary baking, and taking out the metal blank after cooling;
uniformly filling the enamel glaze slurry into the groove of the metal blank, placing the metal blank into an oven for secondary baking, and taking out the metal blank after cooling;
and uniformly filling the enamel glaze slip into the groove of the metal blank, putting the metal blank into an oven for third baking, and taking out the metal blank after cooling.
Further, the steps of the first baking, the second baking and the third baking all comprise the following steps:
and diluting the detergent with sulfuric acid to clean the surface.
Further, the step of filling the metal blank pattern groove with enamel glaze slip for a plurality of times and baking for a plurality of times until the enamel completely fills the precious gold blank groove further comprises the following steps:
and coating a protective material on the surface of the baked enamel.
Further, the specific steps of coating the baked enamel surface with the protective material are as follows:
coating epoxy resin on the surface of the baked enamel;
baking at 50-300 deg.c for 3 hr;
cooling to room temperature, and keeping the temperature for 3 hours.
Further, the step of coating the baked enamel surface with a protective material is followed by the step of:
and cleaning, flattening and brightening the enamel surface.
The invention provides a method for processing discolored enamel applied to metal surface, which is characterized in that the expansion coefficient of enamel glaze is close to that of metal by changing the components of the enamel glaze, the adhesive force between the enamel glaze and the metal surface is increased by a groove on the metal surface, the enamel is gradually formed by multiple filling and baking, and the inner stress concentrated in the forming process of the enamel glaze is released by step forming, so that the problem of surface cracking when the enamel pigment is directly applied to different metals in the prior art is solved, and the yield of the discolored enamel in the batch production process is improved.
Drawings
FIG. 1 is a basic flow chart of a method for processing color-changing enamel applied to a metal surface according to the present invention;
fig. 2 is a flowchart illustrating a method for processing color-changing enamel applied to a metal surface according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and 2, a method for processing color-changing enamel applied to a metal surface comprises the following steps:
step S100, manufacturing a pattern groove on the surface of the metal blank.
In the specific implementation process, the metal surface is coated with the glaze, corresponding grooves are required to be manufactured on the surface of the metal blank according to the enamel patterns to be drawn, and the grooves are used for attaching and fixing the enamel glaze. The metal in this embodiment is a noble metal, particularly a noble metal such as gold, silver, platinum, and the like.
Wherein, step S100 specifically includes the following steps:
step S110, manufacturing a tungsten steel wire hooking cutter in advance;
the wire hooking cutter is used for hooking a groove on the surface of metal, and the tungsten steel wire hooking cutter point is ground on the knife grinder to ensure the sharpness of the tungsten steel wire hooking cutter point and smoothly open a groove on the surface of the metal, in particular to noble metals such as gold, silver, platinum and the like.
And step S120, hooking parallel groove positions on the surface of the metal blank through a tungsten steel wire hooking cutter.
Drawing strip-shaped groove positions on the surface of a metal blank body needing to manufacture the enamel pattern, wherein the strip-shaped groove positions are kept parallel and the groove depth is 0.1 MM; therefore, the enamel glaze can be coated on the surface of the metal, the adhesive force of the enamel glaze on the surface of the metal is increased, the enamel glaze is combined with the surface of the metal, the enamel cannot be separated from the metal due to expansion in the forming process, and meanwhile, the groove formed in the surface of the metal is beneficial to providing an inner contraction space when the metal expands due to heating, so that the enamel glaze is prevented from being integrally extruded in the expansion process due to the fact that the expansion coefficients of the metal and the glaze are different, the formed enamel glaze is prevented from being cracked, and the finished product rate of the enamel is improved.
Further comprises step S130 of surface treatment of the metal blank.
And (4) removing oil and impurities from the surface of the metal blank. Specifically, after being cleaned by 30% dilute sulfuric acid, the surface is degreased by soaking for more than 10 hours by using a mixed solution of detergent and the dilute sulfuric acid. The impurities such as oxide, grease and the like on the surface of the metal can be removed through dilute sulfuric acid cleaning.
S200, mixing 15-23 wt% of silicon, 10-15 wt% of boron, 10-14 wt% of sulfur, 8-12 wt% of phosphorus, 20-30 wt% of organic pigment and 20-30 wt% of binder according to the proportion of the total mass to prepare the enamel glaze powder.
In the concrete implementation process, according to the weight percent of silicon 15-23, boron 10-15, sulfur 10-14 and phosphorus 8-12 as main components of the glaze, such as silica, borax and the like which are main components in quartz powder as raw materials of the glaze, the glaze is mixed by 20-30 weight percent of organic pigment and 20-30 weight percent of adhesive, and the organic pigment and the adhesive in the process are mainly colorless and transparent, so that the melting point of the glaze is reduced, and the glaze is convenient to be fused with each other. The organic pigment is also an organic pigment, and has bright color, strong tinting strength and no toxicity. The adhesive can adopt epoxy resin powder. The proportional components are suitable for noble metal substrates such as gold, silver and platinum, and the like, and the thermal expansion coefficient is close to that of metal. Therefore, the coating is easy to adhere when coated on the metal surface, is not easy to separate in the firing process, and has hard material after molding and high yield.
And step S300, adding a temperature-sensitive color-changing material and a color filler required by a product into the enamel glaze powder and preparing the enamel glaze slurry.
In the specific implementation process, in order to change the color of the enamel according to the change of the temperature, the temperature-sensitive color-changing material is required to be added in the enamel glaze powder, and the color-sensitive color-changing material can adopt a color-changing liquid crystal microcapsule. For different requirements of the color-changing enamel, the changed color can be changed according to the product, so that the required timbre filler is added, and the filler is inorganic pigment and carries metal elements. The enamel glaze realizes temperature sensing color change by mixing the three components.
Step S310, adding a temperature-sensitive color-changing material and a color filler required by a product into the enamel glaze powder and uniformly stirring.
In the enamel glaze slurry in the present embodiment, by mass, the enamel glaze powder: color filler required for the product: temperature sensitive color change material 6: 2.2: 1.8. and simultaneously adding polyvinyl alcohol and water, and stirring to obtain the slurry. With this slurry, the color exhibited is bright red, as in the case of 30 °, and changes from bright red to green, blue, yellow, or more other rich colors below 20 °.
And step S320, performing vacuum-pumping treatment to obtain bubble-free enamel glaze slurry.
In the specific implementation process, the enamel slurry is stirred and vacuumized through the vacuumizing machine, all bubbles in the slurry are pumped out, and the phenomenon that the bubbles appear in the enamel after subsequent metal coating, the material in the enamel is uneven, and the appearance is affected is avoided.
And S400, filling enamel glaze slip into the metal blank pattern groove for multiple times, and baking for multiple times until the precious gold blank groove is completely filled with enamel.
In the specific implementation process, uniformly coating and filling enamel glaze slip on the position of the metal surface where the enamel is required to be manufactured, baking in an oven, and cooling after baking. Because the enamel glaze slurry shrinks, the enamel glaze slurry is coated and filled, and the enamel glaze slurry is cooled after being baked, and is baked for multiple times according to different materials. Thus, the enamel is gradually formed by filling and baking for many times, the enamel glaze is released from concentrated internal stress in the forming process by forming for many times step by step, namely, after baking, cooling a part of enamel glaze slurry to release internal stress so as to reduce the internal stress of the part of enamel, then painting enamel glaze for the second time, after baking, cooling so as to reduce the internal stress of the second part of enamel, in the process, the enamel glaze is subjected to filling, baking and cooling for many times, so that the internal stress concentrated in the forming process of the enamel glaze is released, by the step-by-step enamel adhesion, the simple production process is realized, the enamel glaze is not easy to crack or produce a sandwich layer to cause separation after being cooled, thereby solving the problem of surface cracking when the enamel pigment in the prior art is directly applied to different metals, and improving the yield of the color-changing enamel in the batch production process.
Through the processes of filling and baking the metal blank for many times, the yield is improved through a simple production process, the color of the enamel is brighter and more transparent, the enamel is harder, and the Mohs hardness can reach more than 3.
In this embodiment, according to the components of the existing enamel glaze and the characteristics of the precious metal applied, the specific steps of filling the enamel glaze slurry into the grooves of the metal blank pattern for multiple times and baking for multiple times are as follows:
and S410, uniformly filling the enamel glaze slip into the groove of the metal blank, putting the metal blank into an oven for primary baking, and taking out the enamel glaze slip after cooling.
In the specific implementation process, the metal blank with the enamel glaze is placed in an oven for baking, oxygen is introduced in the baking process to prevent the metal from being oxidized in the baking process, the baking temperature is set to be 30-50 ℃, and the baking time is 40 minutes. Thus, the enamel glaze is shaped by baking at a lower temperature, and the enamel glaze can be successfully attached to the surface of the metal.
After the baking is finished, natural cooling is carried out, cooling is carried out in an oven, so that the internal stress of enamel and metal is slowly released, and the enamel and the metal are taken out and then cleaned by using a mixed liquid of detergent and dilute sulfuric acid to remove impurities such as oxide and the like.
Step S420, uniformly filling the enamel glaze slip into the groove of the metal blank, putting the metal blank into an oven for secondary baking, and taking out the enamel glaze slip after cooling.
In the specific implementation process, enamel filling glaze slip is coated, the metal blank with enamel after the first baking is placed in an oven for the second baking, oxygen is introduced in the baking process to prevent the metal from being oxidized in the baking process, the baking temperature is set to be 50-80 ℃, and the baking time is 120 minutes. Therefore, the second time of baking is carried out for a long time, so that most of structures of the enamel glaze are formed, and the enamel glaze can be successfully combined on the surface of metal.
After the baking is finished, natural cooling is carried out, cooling is carried out in an oven, so that the internal stress of enamel and metal is slowly released, and the enamel and the metal are taken out and then cleaned by using a mixed liquid of detergent and dilute sulfuric acid to remove impurities such as oxide and the like.
And step S430, uniformly filling the enamel glaze slip into the groove of the metal blank, putting the metal blank into an oven for third baking, and taking out the enamel glaze slip after cooling.
In the specific implementation process, enamel filling glaze slip is coated, the metal blank with enamel after the second baking is placed in an oven for the third baking, oxygen is introduced in the baking process to prevent the metal from being oxidized in the baking process, the baking temperature is set to be 90 ℃, and the baking time is 60 minutes. And the third baking at higher temperature makes the enamel glaze completely molded, and the enamel glaze forms a complete structure and is successfully combined on the metal surface.
After the baking is finished, natural cooling is carried out, cooling is carried out in an oven, so that the internal stress of enamel and metal is slowly released, and the enamel and the metal are taken out and then cleaned by using a mixed liquid of detergent and dilute sulfuric acid to remove impurities such as oxide and the like.
And S500, coating a protective material on the baked enamel surface.
In the specific implementation process, the surface of the enamel after baking is coated with a protective material which is colorless epoxy resin, the protective material covers the whole enamel, and the enamel is placed into an oven for baking to enable the protective material to be attached to the surface of the enamel, so that the surface of the enamel is smooth and free of bubbles. The enamel attached to the surface of the metal blank is protected by adding a layer of protective material, so that the color change performance of the color-changing enamel is more durable, and the color change for a longer time is realized.
In this embodiment, coating a protective material on the baked enamel surface according to the characteristics of the material comprises the following specific steps:
and step S510, coating epoxy resin on the surface of the baked enamel.
And S520, baking at 50-300 ℃ for 3 hours.
And step S530, cooling to room temperature, and keeping the temperature for 3 hours.
In the specific implementation process, the epoxy resin is coated on the surface of the enamel uniformly, the temperature in an oven is set to be 50-300 ℃, the time is 3 hours, oxygen is introduced in the heating process, after the heating is finished, the heating is stopped, the temperature is naturally reduced to the room temperature, and the enamel is taken out after the temperature is kept for 3 hours. Thus ensuring smooth, bubble-free and hard enamel surface; the color change performance is more durable, and the longer color change is realized.
And step S600, cleaning, flattening and brightening the enamel surface.
In the specific implementation process, dilute sulfuric acid is used for pickling the enamel sealed with the protective material, oxides and impurities are cleaned, then the enamel is cleaned by clean water, dried and delivered to a mold for carrying out surface flattening, polishing and other process treatments, and the finished product is finished.
The color-changing enamel in the embodiment has the color of high-temperature enamel and has glass-like texture, the color-changing enamel product manufactured by the process has a hard surface, is never faded and is oxidation-resistant, the problem that the color-changing enamel product is easy to crack in enamel production in the prior art is solved, the applicable metal base material is wider, and the color-changing enamel process is applied to various noble metal jewelry such as gold, K gold, platinum and the like, so that the production yield is greatly improved, and the color-changing enamel is suitable for mass production.
The invention provides a method for processing color-changing enamel applied to a metal surface, which is characterized in that the expansion coefficient of the enamel glaze is close to that of a metal by reasonably configuring the components of the enamel glaze, the adhesive force between the enamel glaze and the metal surface is increased through a groove on the metal surface, the enamel glaze is subjected to multiple times of filling, baking and cooling to release the concentrated internal stress in the forming process, and the enamel is attached step by step, so that a simple production process is realized, cracks or a production sandwich layer is not easy to appear after the enamel glaze is cooled to cause separation, the problem of surface explosion when the enamel pigment in the prior art is directly applied to different metals is solved, and the yield of the color-changing enamel in the batch production process is improved.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (9)
1. A method for processing discolored enamel applied to a metal surface is characterized by comprising the following steps:
manufacturing a pattern groove on the surface of the metal blank;
based on the total mass proportion, mixing 15-23 wt% of silicon, 10-15 wt% of boron, 10-14 wt% of sulfur, 8-12 wt% of phosphorus, 20-30 wt% of organic pigment and 20-30 wt% of adhesive to prepare enamel glaze powder;
adding temperature-sensitive color-changing materials and color fillers required by products into the enamel glaze powder and preparing the enamel glaze slurry;
and filling the grooves of the metal blank pattern with enamel glaze slip for multiple times, and baking for multiple times until the precious gold blank grooves are completely filled with enamel.
2. The method for processing stained enamel on a metal surface according to claim 1, wherein said step of forming a groove pattern on the surface of a metal blank comprises the steps of:
pre-manufacturing a tungsten steel wire hooking cutter;
and hooking parallel groove positions on the surface of the metal blank by a tungsten steel wire hooking cutter.
3. The method for enamel coloring applied to a metal surface according to claim 1, wherein the step of adding a temperature sensitive coloring material and a color filler required for a product to the enamel glaze powder to prepare the enamel glaze slip comprises:
adding temperature-sensitive color-changing materials and color fillers required by products into the enamel glaze powder and stirring uniformly;
and (5) vacuumizing to obtain the bubble-free enamel glaze slip.
4. The method for enamel coloring applied to a metal surface according to claim 1, wherein the specific mass ratio of the enamel glaze slip prepared by adding the temperature sensitive coloring material and the color filler required by the product to the enamel glaze powder is as follows:
enamel glaze powder: color filler required for the product: temperature sensitive color change material 6: 2.2: 1.8.
5. the method for enamel painting on a metallic surface according to claim 1, wherein the step of filling the groove of the metallic blank pattern with enamel slip several times and baking the groove several times until the enamel is completely filled in the groove of the noble metal blank comprises:
uniformly filling enamel glaze slip into the groove of the metal blank, putting the metal blank into an oven for primary baking, and taking out the metal blank after cooling;
uniformly filling the enamel glaze slurry into the groove of the metal blank, placing the metal blank into an oven for secondary baking, and taking out the metal blank after cooling;
and uniformly filling the enamel glaze slip into the groove of the metal blank, putting the metal blank into an oven for third baking, and taking out the metal blank after cooling.
6. The method for enamel coloring applied to metal surfaces according to claim 5, wherein the steps of the first baking, the second baking and the third baking are each followed by the steps of:
and diluting the detergent with sulfuric acid to clean the surface.
7. The method for enamel coloring applied to a metal surface according to claim 1, further comprising the steps of, after the step of filling the groove of the metal blank pattern with enamel slip several times and baking several times until the enamel completely fills the groove of the noble-gold blank:
and coating a protective material on the surface of the baked enamel.
8. The method for enamel coloring applied to metal surface according to claim 7, wherein said step of coating the baked enamel surface with a protective material comprises:
coating epoxy resin on the surface of the baked enamel;
baking at 50-300 deg.c for 3 hr;
cooling to room temperature, and keeping the temperature for 3 hours.
9. The enamel finishing method for metallic surfaces according to claim 7, further comprising, after said step of applying a protective material to the surface of the baked enamel, the steps of:
and cleaning, flattening and brightening the enamel surface.
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| CN113693352A (en) * | 2021-08-25 | 2021-11-26 | 深圳市甘露珠宝首饰有限公司 | Preparation method of enamel precious metal ornament and ornament prepared by method |
| CN113831815A (en) * | 2020-06-23 | 2021-12-24 | 江苏卡蒂罗网络科技有限公司 | Temperature-sensitive color-changing baking varnish process for jewelry |
| CN115257219A (en) * | 2022-07-13 | 2022-11-01 | 深圳市信物工坊实业有限公司 | Ophio effect enamel applied to precious metal surface and manufacturing method thereof |
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| CN107028301A (en) * | 2017-03-03 | 2017-08-11 | 尚金品珠宝首饰（深圳）有限公司 | A kind of application for the enamel Yellow gold jewelry jewellery that change colour and preparation method thereof |
| US20190169065A1 (en) * | 2017-12-06 | 2019-06-06 | Lg Electronics Inc. | Coating composition and cooking appliance |
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| CN113831815A (en) * | 2020-06-23 | 2021-12-24 | 江苏卡蒂罗网络科技有限公司 | Temperature-sensitive color-changing baking varnish process for jewelry |
| CN113693352A (en) * | 2021-08-25 | 2021-11-26 | 深圳市甘露珠宝首饰有限公司 | Preparation method of enamel precious metal ornament and ornament prepared by method |
| CN115257219A (en) * | 2022-07-13 | 2022-11-01 | 深圳市信物工坊实业有限公司 | Ophio effect enamel applied to precious metal surface and manufacturing method thereof |
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