KR101383685B1 - Cooking container with thermo-responsive display pattern exposed by laser etching and manufacturing method thereof - Google Patents

Abstract

The present invention provides a method for producing a cooking vessel having temperature-sensitive display patterns exposed by laser etching so that a user can easily check the temperature of the cooking vessel with the naked eye, the production procedure is simplified, and clear patterns are expressed in order to improve product quality. The method of the present invention comprises: a first step of pre-processing the outer surface of a vessel body including a cooking space formed therein; a second step of coating a preset display area on the outer surface of the vessel body with a thermosensitive coating layer including thermo-paint that changes colors according to changes in temperature; a third step of coating a middle coating layer including a dye which has a different color from the thermo-sensitive coating layer so as to cover the thermosensitive coating layer on the outer surface of the vessel body; and a fourth step of forming thermosensitive display patterns at a depth corresponding to the middle coating layer by etching the middle coating layer through a laser so that the outer surface of the thermosensitive coating layer is exposed according to pattern images that are set inside the pre-set display area. [Reference numerals] (31) Contact precaution

Description

Cooking vessel with a temperature sensitive display pattern exposed by laser etching and a method for manufacturing the same {} cooking container with thermo-responsive display pattern exposed by laser etching and manufacturing method

The present invention relates to a cooking vessel, and more specifically, the temperature of the display vessel exposed by laser etching, which can easily check the temperature of the cooking vessel with the naked eye, and simplifies the production process and expresses a clear pattern to improve quality. The present invention relates to a cooking vessel provided with the same and a manufacturing method thereof.

In general, the kitchen cooking vessel consists of a method in which the food is cooked by applying heat to a heating device such as an external gas stove or a built-in heating device to transfer the heat to the food contained in the cooking vessel.

However, the conventional general cooking container is not able to show the temperature state to the user, so that the user subjectively judges the degree of heating by looking at the level of heating or the state of the food being cooked, and thus when cooking the food However, it was not possible to know exactly when the materials were introduced.

In addition, since the temperature is determined by subjective judgment, when the cooking experience is insufficient, the cooking degree may not be easily determined, and the cooking quality may be degraded, such as less cooked or burned food.

Moreover, most users habitually apply excess heat more than necessary for the actual cooking, which shortens the life of the cooking vessel and consumes more energy than necessary.

In addition, since cooking vessels cannot be easily known after cooking, safety accidents such as burns due to high temperatures occur frequently when other users wash or move the cooking vessels.

Thus, conventionally, a cooking vessel capable of recognizing its temperature by providing a temperature sensor in a cooking vessel or forming a Zion pigment coating layer whose color changes with temperature on the surface of the cooking vessel is developed.

However, in the method of including a temperature sensor in a cooking vessel, as the inner or outer surface of the cooking vessel is coated, the process of processing the temperature sensor is complicated and difficult to reduce the productivity. There was a rising issue.

Meanwhile, a conventional cooking container using a Zion pigment is formed as a transfer method for attaching a pattern that is discolored by heat using a thermally discolored printing paper or a pad after coating a general coating on the cooking container, or a pattern to be printed. Condensation of the screen The screen printing method of extruding Zion coating and printing was used.

Accordingly, there is a problem that the durability of the printed pattern is dropped, such as falling from the body when used for a long time, as well as the edge of the printed pattern is not clear, there is a problem that impairs the design aesthetics of the product. In addition, there is a problem in that labor costs and manufacturing costs are increased due to a complicated manufacturing process, which requires an additional attachment process separate from the manufacturing process of the cooking vessel.

Korean Registration Room No. 20-0281153

In order to solve the above problems, the present invention is easy to check the temperature of the cooking vessel with the naked eye, the temperature-sensitive display pattern exposed by laser etching to improve the quality by simplifying the production process and expressing a clear pattern It is a problem to provide a cooking vessel provided and a method of manufacturing the same.

In order to solve the above problems, the present invention is a first step of pre-processing the outer surface of the container body is formed inside the cooking space; A second step of painting a temperature-sensitive coating layer including a Zion pigment whose color changes in accordance with temperature change in a predetermined display area of the outer surface of the container body; A third step of painting an intermediate coating layer containing a color pigment different from the color of the temperature sensitive coating layer so as to cover the temperature sensitive coating layer on the outer surface of the container body; And forming a temperature sensitive display pattern by laser etching the intermediate coating layer to a depth corresponding to the thickness of the intermediate coating layer so that the outer surface of the temperature sensitive coating layer is exposed along the pattern image set inside the preset display area. Provided is a method of manufacturing a cooking vessel having a temperature sensitive display pattern exposed by laser etching including four steps.

Here, in the fourth step, the frequency of the laser is preferably set to a predetermined frequency corresponding to the absorption rate for each color of the intermediate paint layer.

In addition, the fourth step preferably includes a step of forming a clear coating layer for cleaning the outer surface of the container body laser-etched and protect the laminated coating film.

On the other hand, the present invention is the container body formed cooking space inside; A temperature-sensitive coating layer coated on a predetermined display area of the outer surface of the container body and including a Zion pigment whose color changes with temperature change; And a paint including a color pigment different from the color of the temperature sensitive coating layer on the outer surface of the container body to cover the temperature sensitive coating layer, wherein the temperature response is performed according to a pattern image set inside the preset display area. The present invention provides a cooking vessel having a temperature sensitive display pattern exposed by laser etching including an intermediate coating layer including a temperature sensitive display pattern removed by laser etching to expose an outer surface of the coating layer.

In this case, the temperature-sensitive display pattern is preferably etched to a depth corresponding to the thickness of the intermediate paint layer as the laser is set to a predetermined frequency corresponding to the absorption rate for each color of the intermediate paint layer.

Through the above solution, the present invention provides the following effects.

First, since the temperature-sensitive display pattern changes color depending on the temperature of the cooking vessel, the user can visually grasp the temperature, thereby preventing a safety accident such as an image, and is formed by laser etching an intermediate coating layer. The contours are elaborate and distinct, providing a beautiful and detailed appearance.

Second, the temperature sensitive display pattern is exposed as a clear outline of the temperature-sensitive coating layer and is expressed as a text message indicating a temperature change, so that the phrases that induce the user's vision together with the color contrast are clearly displayed, which significantly increases the safety of the product. Can be improved.

Third, the temperature-sensitive display pattern is accurately etched to the thickness of the intermediate coating layer according to the laser irradiation set to correspond to the absorption rate of each color of the intermediate coating layer, thereby minimizing damage of the temperature-sensitive coating layer, thereby improving visibility and quality of the pattern image. This can be improved.

Fourth, the temperature-sensitive coating layer is covered by the intermediate coating layer is firmly fixed to the container body to prevent peeling of the coating film, thereby preventing corrosion due to moisture and oxygen infiltration to improve the durability of the product, the temperature-sensitive coating Since the layer is coated only on the predetermined display area, the amount of cyan pigment consumed is reduced and the painting process time can be shortened, thereby improving product productivity.

1 is a flowchart illustrating a method of manufacturing a cooking vessel having a temperature sensitive display pattern exposed by laser etching according to an embodiment of the present invention.
2A to 2C are cross-sectional views of a container body according to a manufacturing step of a cooking vessel having a temperature sensitive display pattern exposed by laser etching according to an embodiment of the present invention.
Figure 3 is a schematic diagram of a laser etching apparatus used to manufacture the inner pot for cooking in the manufacture of a cooking vessel with a temperature sensitive display pattern exposed by laser etching in accordance with an embodiment of the present invention.

Hereinafter, a cooking vessel equipped with a temperature sensitive display pattern exposed by laser etching according to a preferred embodiment of the present invention and a manufacturing method thereof will be described in detail with reference to the accompanying drawings.

1 is a flow chart illustrating a method of manufacturing a cooking vessel having a temperature sensitive display pattern exposed by laser etching according to an embodiment of the present invention, Figures 2a to 2c is a laser etching according to an embodiment of the present invention 3 is a cross-sectional view of the container body according to the manufacturing step of the cooking vessel having a temperature sensitive display pattern exposed by, Figure 3 is a cooking vessel having a temperature sensitive display pattern exposed by laser etching in accordance with an embodiment of the present invention It is a schematic diagram of the laser etching apparatus used for the manufacture of the inner pot for cookers in the manufacture of.

As shown in Figures 1 to 3c, the manufacturing method of the cooking vessel 100 with a temperature-sensitive display pattern exposed by the laser etching is as follows.

First, provided with an aluminum material or a stainless steel material, the container body 10 is formed with a cooking space in which food is accommodated therein, and then performs a pretreatment process such as washing and sand blasting (s1).

In this case, the sand blasting process refers to a method of removing impurities and processing roughness by strongly spraying blasting powder such as aluminum oxide on the surface of the container body 10 using an injector. Accordingly, the adhesion of the coating layer applied to the outer surface of the container body 10 can be improved.

Here, the container body 10 is preferably made of aluminum, magnesium, titanium, stainless steel, natural stone, carbon moldings and a plurality of mixed materials thereof, but may also be made of a clad metal material.

Of course, the outer surface of the container body 10 may be provided with a primer coating layer. Here, the primer coating layer is preferably provided with a good spreadability, high adhesive material. Accordingly, the primer coating layer may be uniformly applied to the outer surface of the container body 10 to form a flat surface, it may be firmly adhered to the container body 10 and coated stably.

Furthermore, as the primer coating layer forms a flat surface, the coating layer applied on the upper side may be formed to have a uniform thickness, and the coating layer applied on the upper side may be stably seated and fixed due to the adhesiveness of the primer coating layer. have. Accordingly, it is possible to prevent a repelling phenomenon in which the applied coating layer is pushed or a mottled scale or crater shape is formed on the outer surface of the coating layer.

In addition, the primer coating layer is preferably provided with a heat insulating material. At this time, the primer coating layer can reduce the heat transfer to the outside to improve the cooking efficiency, to prevent safety accidents such as burns.

In general, the Zion pigment contained in the temperature-sensitive coating layer 20 has a heat resistance of up to 280 ℃, but the actual commercial temperature is 230 ~ 240 ℃, the color change phenomenon that does not return to the original color when the commercial temperature is exceeded Can be caused. At this time, the primer coating layer can prevent the discoloration phenomenon by preventing the temperature-sensitive coating layer 20 to be coated on the container body 10 to improve the durability of the product.

Next, referring to FIG. 2A, a temperature sensitive coating layer 20 is formed in a predetermined display area of the outer surface of the container body 10 which has been pretreated (s2). Here, the predetermined display area refers to an area including a portion where a temperature sensitive display pattern 31 for visually indicating a temperature state of the heated container body 10 is formed on the outer surface of the container body 10. .

In detail, the forming of the temperature sensitive coating layer 20 may include forming a portion exposed to the outside when the intermediate coating layer 30 is peeled off by laser etching to form the temperature sensitive display pattern 31 in a post process. Means pre-process.

In this case, the temperature-sensitive coating layer 20 is covered by the intermediate coating layer 30 except for the portion where the intermediate coating layer 30 formed on the upper side is laser-etched and is not exposed to the outside of the container body 10 It is not painted on the whole outer surface of the

That is, since the temperature sensitive display pattern 31 is formed only in the predetermined display area in which the temperature sensitive display pattern 31 is to be formed, the productivity of the product may be improved by reducing the amount of cyan pigment consumed and shortening the coating process time.

In addition, the temperature sensitive coating layer 20 is preferably uniformly coated with a constant thickness through an automatic spray gun so that the intermediate coating layer 30 laminated on the upper side is formed to have a uniform thickness.

The temperature sensitive coating layer 20 is formed in the predetermined display area, and the edge portions except for the portions exposed during laser etching are covered by the intermediate coating layer 30 without being exposed to the outside. Accordingly, since a process of finely controlling the edge of the temperature-sensitive coating layer 20 such as a separate masking operation is not required, the production process can be simplified and the productivity of the product can be improved.

In addition, since the temperature-sensitive coating layer 20 is fixed between the outer surface of the container body 10 and the intermediate coating layer 30 because the edge portion can be firmly adhered to the container body 10, the coating film By preventing the peeling of the container to prevent corrosion of the container body 10 due to moisture or oxygen infiltration and durability of the product can be improved.

In addition, the temperature sensitive coating layer 20 includes 15 to 45% by weight of a Zion paint containing a Zion pigment, and includes 55 to 85% by weight of a transparent synthetic resin paint. Here, the Zion paint is a paint containing a Zion pigment may be changed in color according to the temperature change of the container body (10). The synthetic resin-based paint may be provided as a urethane-based paint or a Teflon-based paint.

In this case, the Zion paint is preferably provided with a mixture of an inorganic filler, a gloss effect agent, a catalyst, a binder, and the like with the Zion pigment. In addition, the temperature sensitive coating layer 20 is most preferably formed so that the weight ratio of the Zion paint and the synthetic resin paint is 3: 7.

Here, when the Zion paint is less than 15% by weight and the synthetic resin paint is more than 85% by weight, there is a fear that the color change of the temperature sensitive coating layer 20 may not appear accurately, and the Zion paint is 45% by weight. When the synthetic resin based paint is less than 55% by weight, the adhesion between the temperature sensitive coating layer 20 and the container body 10 and the temperature sensitive coating layer 20 and the other coating layers is reduced, so that the coating is performed. Peeling may occur, such as peeling easily.

In addition, the temperature-sensitive coating layer 20 preferably comprises a Zion pigment that changes the color at 40 ~ 70 ℃, the Zion pigment is most preferably completed the color change at 60 ℃.

In addition, the Zion pigment is preferably provided with a color that can give a contrast effect with the color of the intermediate coating layer on the upper side of the color wheel. For example, when the color of the intermediate paint layer is a dark color of indigo-based, the Zion pigment may be provided in a transparent or indigo-based light color to be changed to red at 60 ℃.

Accordingly, even if there is no special guidance, the user may feel uncomfortable due to the contrast color and prevent the user from touching the high temperature cooking container, thereby improving the safety of the product.

Of course, when the cooking vessel 100 is a frying pan or the like, the zion pigment may be provided in red so as to indicate that the cooking temperature is cookable, but it may be changed to a light color of transparent or indigo blue at 60 ° C. Accordingly, it can be intuitively recognized that the frying pan has become a cookable state.

Then, when the temperature-sensitive coating layer 20 is coated, it performs a touch drying process. Here, the contact drying refers to a state in which adhesiveness is applied when the coating film is lightly touched with a finger, but the coating does not adhere to the finger, and the durable coating may be formed by improving the adhesive force with the coating layer laminated on the upper side.

Meanwhile, referring to FIG. 2B, the intermediate paint layer 30 including color pigments is disposed on the outer surface of the container body 10 on which the temperature sensitive paint layer 20 is formed to cover the temperature sensitive paint layer 20. To paint (s3). Here, the color pigment is provided differently from the color of the temperature sensitive coating layer (20). At this time, the color of the temperature-sensitive coating layer 20 may change color according to the temperature during the process because the color is changed according to the temperature, the color pigments of the temperature-sensitive coating layer 20 in the temperature state during the process It is preferred that the color is provided differently.

In detail, the intermediate coating layer 30 is coated to cover the temperature sensitive coating layer 20, it is preferable to be coated on the entire outer surface of the container body (10). In addition, the intermediate coating layer 30 is preferably provided with a color so that the temperature sensitive coating layer 20 is not exposed to the outside. At this time, it is preferable to understand that the color means a dark-based color that can cover the color of the lower temperature-sensitive paint layer 20 as a non-transparent color.

In addition, the intermediate coating layer 30 may be provided with a synthetic resin-based paint having heat resistance and abrasion resistance, it may be provided with a urethane or Teflon-based resin. Accordingly, the intermediate coating layer 30 may not only cover and protect the temperature-sensitive coating layer 20 and the container body 10, but also the heat of the container body 10 due to the heat resistance of the resin itself. Can reduce some of the leakage.

At this time, the intermediate coating layer 30 is preferably provided with a thickness of 10 ~ 20㎛. In this case, when the thickness is less than 10 μm, the temperature sensitive coating layer 20 may not be properly covered and the temperature sensitive coating layer 20 may be exposed to the outside. Etching may be difficult and additional process time may be required to dry and planarize the intermediate coating layer 30.

Meanwhile, referring to FIG. 2C, the outer surface of the temperature-sensitive coating layer 20 is exposed along the pattern image set inside the predetermined display area in the container body 10 in which the intermediate coating layer 30 is coated and dried. The intermediate coating layer 30 is laser-etched to form a temperature sensitive display pattern 31 (s4).

Here, the laser etching is a process of peeling off a portion of the intermediate coating layer 30 by heating the laser by irradiating a laser, and exposing the temperature sensitive coating layer 20 to the outside to expose the temperature sensitive display pattern 31 to the outside. Express the color of. In addition, the laser etching may instantaneously heat the narrow area to which the laser is irradiated to sublimate the paint of the irradiated area so that the pattern image may be expressed with a clear outline.

In this case, the pattern image is provided with at least one or two or more shapes of lines, figures, patterns, and characters, and the temperature-sensitive display pattern 31 is a detailed image combining various shapes such as lines, figures, patterns, and characters. It can be expressed as.

Accordingly, the temperature sensitive display pattern 31 may improve the product satisfaction by providing a clear and elegant pattern image and a high-quality appearance design that are different from existing products.

Of course, the temperature sensitive display pattern 31 may be provided as a text message to call the user's attention. For example, the text message may be provided as a text message such as a contact note, and the text message is not limited to the contact note, and may be used without limitation as long as it is a text message with content that can call attention to the user. Can be.

Accordingly, the temperature sensitive display pattern 31 is expressed as a text message indicating the temperature change as well as the temperature sensitive paint layer 20 is exposed with a clear outline to sharpen the phrase that attracts the user's vision with color contrast. As a result, the safety of the product can be significantly improved.

As shown in FIG. 3, in order to perform a laser etching operation, the container body 10 is mounted and fixed to a jig, and a pattern image for etching the intermediate coating layer 30 on the controller of the laser etching apparatus 40. Enter into the program and set the laser marking speed, laser frequency, etc.

The laser etching apparatus 40 is disposed in the preset display area, and when the laser etching apparatus 40 is executed, the laser etching apparatus 40 generates a laser according to a program input to the controller. . At this time, the intermediate coating layer 30 may be etched as it is instantaneously heated and evaporated by a laser.

In addition, the laser etches the intermediate paint layer 30 to a depth corresponding to the thickness thereof. In this case, the depth in which the intermediate coating layer 30 is etched may be adjusted according to the marking speed of the laser.

Here, the intermediate coating layer 30 is preferably formed to have a predetermined thickness using an automatic spray gun. At this time, when the intermediate coating layer 30 is provided with 10 ~ 20㎛ laser marking speed is preferably set to 110mm / s. In addition, the marking speed is preferably set slowly when the intermediate paint layer 30 is thick, and preferably set rapidly when the intermediate paint layer 30 is thin.

When the marking speed is high, the time that the intermediate coating layer 30 is exposed to the laser is shortened, so that the intermediate coating layer 30 is not properly etched, and thus the intermediate coating layer 30 is not exposed to the outer surface of the temperature sensitive coating layer 20. When the marking speed is lowered, the visibility of the pattern image formed by increasing the width of the portion etched in the intermediate paint layer 30 may be reduced.

In addition, the frequency of the laser is preferably set to a predetermined frequency corresponding to the absorption rate for each color of the intermediate paint layer (30). In this case, the laser is formed at a constant wavelength according to the medium for generating the laser. For example, a Yttrium Aluminum Garnet doped with Nd (Nd: YAG) laser has a wavelength of about 1.06 μm, and a carbon dioxide (CO 2) laser has a wavelength of 10.6 μm, and an excimer ( exited dimer (Excimer) laser has a wavelength of 0.3㎛.

In addition, the laser having a single wavelength changes the absorption rate at which the laser energy is absorbed according to the color of the object to be irradiated. That is, even when irradiating a laser of the same frequency, the heating is not well performed in the case of the color having a low absorption rate, it can be effectively heated in the case of a color having a high absorption rate.

According to the present embodiment, the intermediate coating layer 30, which has a thickness of 10 to 20 µm, has a dark brown color and is etched by setting the frequency of the laser 40w to 40 kHz. It was confirmed that the temperature-sensitive coating layer 20 of the color different from) shows little etching or discoloration, and only the intermediate coating layer 30 is correctly removed.

If the practitioner having ordinary knowledge in the technical field to which the present invention pertains, the color of the intermediate coating layer 30 and the frequency of the laser which can be etched corresponding to the intermediate coating layer 30 through several trials and errors may be prepared as a table.

That is, the color of the intermediate paint layer 30 can be represented by the coordinates derived from the numerical value representing the state of each light source of R, G, B by RGB addition mixing, and corresponds to the respective R, G, B coordinate values. Experimental derivation of the frequency of the laser can be formed into a table.

For example, in the case where the intermediate paint layer 30 is a red index, the coordinates of 255,0,0 can be expressed, and the frequency of the laser is adjusted and the table to find the frequency at which the intermediate paint layer 30 is accurately etched. Can be mad.

As such, since the temperature sensitive display pattern 31 is formed by irradiating a laser set to a predetermined frequency corresponding to the absorption rate of each color of the intermediate paint layer, only the intermediate paint layer 30 may be etched. Visibility and quality of the exposed pattern image may be improved by minimizing discoloration or etching of the coating layer 20.

Of course, when the laser etching apparatus 40 is provided with a tunable laser, the wavelength of the laser may be set to a predetermined wavelength corresponding to the color of the intermediate paint layer 30. Accordingly, only the intermediate coating layer 30 provided in a different color from the temperature sensitive coating layer 20 may be more accurately etched.

The poly delay time of the laser is preferably 3 s. Here, the poly delay time is also referred to as a polygon delay, which means that the laser oscillation within the object matches the laser head oscillation timing and the movement of the scanhead between the points where the sides of the letters meet.

In detail, when performing the laser etching operation on the intermediate coating layer 30, when the poly delay time is 3 ㎲ or less, the angle of the point where the side and the side of the pattern image meet may collapse, and when the poly lag time is 3 ㎲ or more, The laser stays longer at the point where the edge meets, resulting in a dot.

In addition, in the step of etching the intermediate coating layer 30 by irradiating a laser, air blowing or suction to remove the etched floating material is preferably performed together, and a separate washing and air blowing process may be added after the pattern is formed. It is possible.

Meanwhile, when the temperature sensitive display pattern 31 is formed on the container body 10 (s4), a clear coating layer may be formed to clean the outer surface of the container body 10 that has been laser-etched and to protect the laminated coating film. have.

In detail, the clear coating layer may be provided with a transparent urethane-based paint or ceramic or diamond coating. Here, the clear coating layer may protect the intermediate coating layer 30 to prevent hygiene and appearance problems due to corrosion and rust caused by the container body 10 is exposed.

In addition, the temperature sensitive display pattern 31 formed by laser etching may be filled to planarize the coating film laminated on the outer surface of the container body 10 to provide a more advanced surface texture.

Through the above-described process, the temperature sensitive display pattern 31 may be formed in the cooking vessel 100. As such, since the temperature-sensitive display pattern 31 is formed by etching the intermediate coating layer 30 with a laser, the visibility of the pattern image to be expressed is not only improved, but the fine and detailed pattern image is expressed, thereby enhancing the appearance design. Therefore, it is possible to improve the satisfaction of the product by providing a design that is differentiated from the existing product.

As described above, the present invention is not limited to the above-described embodiments, and variations and modifications may be made by those skilled in the art without departing from the scope of the present invention. And such modifications are within the scope of the present invention.

100: cooking container 10: container body
20: temperature sensitive coating layer 30: intermediate coating layer
31: temperature sensitive display pattern 40: laser etching device

Claims (5)

A first step of pre-processing the outer surface of the container body in which the cooking space is formed;
A second step of painting a temperature-sensitive coating layer including a Zion pigment whose color changes in accordance with temperature change in a predetermined display area of the outer surface of the container body;
A third step of painting an intermediate coating layer containing a color pigment different from the color of the temperature sensitive coating layer so as to cover the temperature sensitive coating layer on the outer surface of the container body; And
A fourth process of forming a temperature sensitive display pattern by laser etching the intermediate coating layer to a depth corresponding to the thickness of the intermediate coating layer so that the outer surface of the temperature sensitive coating layer is exposed along the pattern image set inside the preset display area. A method of manufacturing a cooking vessel having a temperature sensitive display pattern exposed by laser etching comprising the step. The method according to claim 1,
The method of claim 4, wherein the frequency of the laser is set to a predetermined frequency corresponding to the absorption rate of each color of the intermediate paint layer. The method according to claim 1,
The fourth step includes the step of cleaning the outer surface of the laser-etched container body and forming a clear coating layer for protecting the laminated coating film, characterized in that the cooking vessel with a temperature-sensitive display pattern exposed by laser etching Manufacturing method. A container body having a cooking space formed therein;
A temperature-sensitive coating layer coated on a predetermined display area of the outer surface of the container body and including a Zion pigment whose color changes with temperature change; And
A paint containing a color pigment different from the color of the temperature sensitive coating layer is formed on the outer surface of the container body to cover the temperature sensitive coating layer, and the temperature sensitive coating is performed according to a pattern image set inside the preset display area. A cooking vessel provided with a temperature sensitive display pattern exposed by laser etching comprising an intermediate coating layer comprising a temperature sensitive display pattern removed by laser etching to expose the outer surface of the layer. 5. The method of claim 4,
The temperature-sensitive display pattern is etched to a depth corresponding to the thickness of the intermediate coating layer as the laser is set to a predetermined frequency corresponding to the absorption rate for each color of the intermediate coating layer by laser etching, characterized in that provided by Cooking vessel with exposed temperature-sensitive display pattern.

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