Coloring method for enabling surface of oak floor to be jade gray
By reacting chemicals such as ferrous sulfate, hydrogen peroxide, sodium hydroxide, and calcium carbonate with the surface of oak flooring, the problem of solid wood flooring lacking the visual weight of jade gray is solved, achieving a natural aging effect and revealing the wood texture.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2026-03-27
AI Technical Summary
Existing technology makes it difficult to reproduce the natural aging and weathering effects of jade gray in solid wood flooring, resulting in a lack of visual weight and wood grain coverage.
The process involves using chemicals such as ferrous sulfate, hydrogen peroxide, sodium hydroxide, and calcium carbonate to react with the surface of oak. Through a multi-step process, the flooring surface is made to appear jade gray, including applying a ferrous sulfate solution, oxidation treatment, bleaching, neutralization with a reducing agent, and finally applying a water-based color-retaining agent.
It achieves the natural aging and weathering feel of the floor surface and the heavy feel of jade gray, showcasing the texture of wood and visually making it seem as if the wood has grown in its original color, returning to nature.
Smart Images
Figure CN121732408A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of floor surface treatment technology, specifically to a method for coloring oak flooring surfaces to a jade gray color. Background Technology
[0002] With the improvement of living standards in recent years, consumers' pursuit of material goods has moved beyond simply satisfying the most basic functions. Instead, it has become more diversified. Factors influencing consumer choices include personal preferences, multifunctional needs, design styles, quality levels, and brand loyalty and recognition. In other words, the high-end market is no longer dominated by a small group of people; it is attracting increasing attention and has a wider audience. The flooring industry is no exception. Jade gray solid wood flooring has always been highly favored in the high-end market both domestically and internationally. Consumers have a particular fondness for the natural grain of solid wood flooring, and jade gray, a cool gray tone reminiscent of jade, combines these qualities to create a visual and textural effect that aligns with people's aesthetic appreciation of nature. Jade gray is a moderately deep gray tone, resembling the color of jade, hence its name. It is widely used in furniture and flooring color selection because it conveys a sense of nobility and elegance.
[0003] Jade gray solid wood flooring has been popular both domestically and internationally for over 20 years. Currently, the method to make solid wood flooring appear jade gray involves applying or brushing pre-mixed jade gray paint during the flooring oiling or varnishing process. However, this process covers the wood grain on the surface of the flooring, and the color lacks the richness of natural jade gray. The most direct sensory experience is that it lacks the authenticity of natural aging and weathering of wood. Summary of the Invention
[0004] To address the aforementioned problems, this invention proposes a coloring method for oak flooring surfaces to achieve a jade-gray color. This method utilizes the tannins, polysaccharides, phenols, and other substances contained in oak to penetrate the flooring surface and undergo a chemical reaction to produce a jade-gray color.
[0005] To achieve the above objectives, the following technical solution is adopted: a method for coloring oak flooring to a jade gray color, comprising the following steps,
[0006] S1. Select oak with a tannin content of 4%-16% as the raw material for processing flooring;
[0007] S2. Before the surface oiling and painting processes in the flooring manufacturing process, a ferrous sulfate solution is applied to the flooring surface and allowed to air dry naturally. The concentration of the ferrous sulfate solution is 5%.
[0008] S3. Apply an oxidizing agent to the floor surface for oxidation treatment, and allow it to air dry naturally. The oxidizing agent is hydrogen peroxide with a concentration of 1% to 1.3%.
[0009] S4. Apply bleach to the floor surface for bleaching treatment, and allow it to air dry naturally. The bleach is a 10% sodium hydroxide solution.
[0010] S5. Apply a reducing agent aqueous solution to the floor surface for ion neutralization, allow it to air dry naturally, and then polish the floor surface. The reducing agent aqueous solution is a mixed solution formed by adding calcium carbonate to water and stirring, wherein the ratio of calcium carbonate to water is 1:2.
[0011] S6. Apply a water-based color-preserving agent to the floor surface for color preservation treatment, and after drying, use it for surface oiling and painting processes in the floor processing.
[0012] Furthermore, the natural ventilation drying described in steps S1-S5 involves completely exposing the coated surface to the air.
[0013] Furthermore, the drying in step S6 is a through-type drying, with the drying temperature controlled between 25℃ and 40℃.
[0014] Beneficial effects of the invention: The invention utilizes the principle of chemical substances penetrating into the surface of wood to cause a chemical reaction, so that the surface of the flooring presents a natural aging and weathering old look, as well as a natural jade gray and heavy feel, better showcasing the wood texture on the surface of the flooring. Ferrous sulfate solution is applied to the floor surface. The tannins in the oak react with the ferrous sulfate to form ferrous tannate. Due to the instability of ferrous sulfate, it is easily oxidized in the air to form ferric tannate, which is black, but appears dark blue on the floor surface, serving as the base color. Diluted hydrogen peroxide is then used to oxidize the floor surface and the penetration layer, resulting in a deep yellow color. Sodium hydroxide, using sodium ions as a bleaching agent, is then used to age the floor surface, giving it a light yellow color. Finally, calcium carbonate is used as a reducing agent to neutralize the acid and alkaline radicals on the wood surface and in the penetration layer, resulting in ferrous, ferric, and calcium ion products that precipitate on the floor surface, presenting a jade gray color. After several color changes throughout the process, the various products ultimately precipitate on the floor surface, presenting a jade gray color on the surface layer. Therefore, the visual impression is that this color is the natural color of the wood surface, returning to nature. Attached Figure Description
[0015] Figure 1 This is a flowchart illustrating the coloring process of the present invention; Detailed Implementation
[0016] This invention provides a method for coloring oak flooring to a jade gray color, the method comprising the following steps:
[0017] S1. White oak with a tannin content of 4%-16% is selected as the raw material for processing flooring. White oak has a high tannin content.
[0018] S2. Select flooring that has not yet undergone surface oiling or painting processes during the flooring processing as the implementation object, and prepare a 5% ferrous sulfate solution, in which solid ferrous sulfate is added to water at a temperature of 25℃-40℃, stirred evenly until there are no ferrous sulfate crystals, and then evenly coated on the floor surface, placed in a ventilated place to air dry naturally, and during drying, the coated surface is completely exposed to the air.
[0019] S3. Prepare hydrogen peroxide with a concentration of 1%-1.3%, apply it evenly to the floor surface, and place it in a ventilated place to air dry naturally. During drying, the coated surface should be completely exposed to the air.
[0020] S4. Prepare a 10% sodium hydroxide solution, apply it evenly to the floor surface, and place it in a ventilated area to air dry naturally. During drying, the coated surface should be completely exposed to the air.
[0021] S5. Prepare a reducing agent by adding calcium carbonate to water to form a mixed solution with a calcium carbonate to water ratio of 1:2. After stirring evenly, apply the solution to the floor surface and place it in a ventilated place to air dry naturally. During drying, expose the coated surface to the air completely.
[0022] S6. Apply a water-based color-preserving agent to the floor surface for color preservation treatment, and then put it into a through-type drying equipment for drying. The drying temperature is controlled at 25℃-40℃. After drying, it is used for surface oiling and painting processes in the floor processing.
[0023] Example 1
[0024] This example is implemented according to the coloring method of the present invention, following steps S1-S6, wherein...
[0025] S1. Oak with a tannin content of 4% is selected as the raw material for processing flooring;
[0026] S2. Apply a 5% ferrous sulfate solution to the floor surface. After it dries completely, the color precipitates on the floor surface, turning it dark blue.
[0027] S3. Apply 1% hydrogen peroxide to the floor surface. After it dries completely, the color settles on the floor surface, giving it a deep yellow color.
[0028] S4. Apply a 10% sodium hydroxide solution to the floor surface. After it dries completely, the color settles on the floor surface, giving it a light yellow color.
[0029] S5. Apply a mixed solution of calcium carbonate and water to the floor surface, wherein the ratio of calcium carbonate to water is 1:2. After it dries completely, the color is deposited on the floor surface, and the floor surface appears jade gray.
[0030] S6. Apply a water-based color-preserving agent to the floor surface for color preservation treatment. After drying, the color of the floor surface does not change significantly. The product in this example is then processed using normal flooring processing techniques to obtain the finished product, which is marked as m1.
[0031] Example 2
[0032] This example is implemented according to the coloring method of the present invention, following steps S1-S6, wherein...
[0033] S1. Oak with a tannin content of 16% is selected as the raw material for processing flooring;
[0034] S2. Apply a 5% ferrous sulfate solution to the floor surface. After it dries completely, the color precipitates on the floor surface, turning it dark blue.
[0035] S3. Apply 1.3% hydrogen peroxide to the floor surface. After it dries completely, the color settles on the floor surface, giving it a deep yellow color.
[0036] S4. Apply a 10% sodium hydroxide solution to the floor surface. After it dries completely, the color settles on the floor surface, giving it a light yellow color.
[0037] S5. Apply a mixed solution of calcium carbonate and water to the floor surface, wherein the ratio of calcium carbonate to water is 1:2. After it dries completely, the color is deposited on the floor surface, and the floor surface appears jade gray.
[0038] S6. Apply a water-based color-preserving agent to the floor surface for color preservation treatment. After drying, the color of the floor surface does not change significantly. The product in this example is then processed using normal flooring processing techniques to obtain the finished product, which is marked as m2.
[0039] in,
[0040] In this embodiment, the dark blue color of the floor surface in S2 is slightly darker than that of the floor surface in S2 in embodiment 1, but the overall difference is not significant.
[0041] In this embodiment, the dark yellow color of the floor surface in S3 is slightly darker and more reddish-yellow than that of the floor surface in S3 in embodiment 1, but the overall difference is not significant.
[0042] In this embodiment, the light yellow color of the floor surface in S4 is almost imperceptible to the naked eye compared to the light yellow color of the floor surface in S4 in embodiment 1.
[0043] In this embodiment, the jade gray color of the floor surface in S5 is almost imperceptible to the naked eye compared to the jade gray color of the floor surface in S5 of Embodiment 1.
[0044] Comparative Example 1
[0045] This example follows the coloring method of Example 1, but modifies step S1.
[0046] S1 is made from oak with a tannin content of 2%, such as red oak.
[0047] S2. Apply a 5% ferrous sulfate solution to the floor surface. After it dries completely, the color precipitates on the floor surface, giving it a bluish-green hue.
[0048] S3. Apply 1% hydrogen peroxide to the floor surface. After it dries completely, the color settles on the floor surface, turning it yellow.
[0049] S4. Apply a 10% sodium hydroxide solution to the floor surface. After it dries completely, the color settles on the floor surface, giving it a light yellow color.
[0050] S5. Apply a mixed solution of calcium carbonate and water to the floor surface, wherein the ratio of calcium carbonate to water is 1:2. After it dries completely, the color is deposited on the floor surface, and the floor surface appears grayish-green.
[0051] S6. Apply a water-based color-preserving agent to the floor surface for color preservation treatment. After drying, the color of the floor surface does not change significantly. The product in this example is then processed using normal flooring processing techniques to obtain the finished product, which is marked as m3.
[0052] Comparative Example 2
[0053] This example follows the coloring method of Example 1, but modifies step S2.
[0054] S1. Oak with a tannin content of 4% is selected as the raw material for processing flooring;
[0055] S2. Apply a 1% ferrous sulfate solution to the floor surface. After it dries completely, the color precipitates on the floor surface, turning it a light blue color.
[0056] S3. Apply 1% hydrogen peroxide to the floor surface. After it dries completely, the color settles on the floor surface, giving it a reddish-yellow color.
[0057] S4. Apply a 10% sodium hydroxide solution to the floor surface. After it dries completely, the color settles on the floor surface, giving it a light yellow color.
[0058] S5. Apply a mixed solution of calcium carbonate and water to the floor surface, wherein the ratio of calcium carbonate to water is 1:2. After it dries completely, the color is deposited on the floor surface, and the floor surface appears grayish-green.
[0059] S6. Apply a water-based color-preserving agent to the floor surface for color preservation treatment. After drying, the color of the floor surface does not change significantly. The product in this example is then processed using normal flooring processing techniques to obtain the finished product, which is marked as m4.
[0060] In this embodiment, the gray-green color of the floor surface in S5 is lighter than that of the floor surface in S5 in Comparative Example 1.
[0061] Comparative Example 3
[0062] This example follows the coloring method of Example 1, but modifies step S3.
[0063] S1. Oak with a tannin content of 4% is selected as the raw material for processing flooring;
[0064] S2. Apply a 5% ferrous sulfate solution to the floor surface. After it dries completely, the color precipitates on the floor surface, turning it dark blue.
[0065] S3. Apply 0.1% hydrogen peroxide to the floor surface. After it dries completely, the color settles on the floor surface, giving it a gray appearance.
[0066] S4. Apply a 10% sodium hydroxide solution to the floor surface. After it dries completely, the color settles on the floor surface, giving it a light gray color.
[0067] S5. Apply a mixed solution of calcium carbonate and water to the floor surface, wherein the ratio of calcium carbonate to water is 1:2. After it dries completely, the color is deposited on the floor surface, and the floor surface appears dark gray.
[0068] S6. Apply a water-based color-preserving agent to the floor surface for color preservation treatment. After drying, the color of the floor surface does not change significantly. The product in this example is then processed using normal flooring processing techniques to obtain the finished product, which is marked as m5.
[0069] Comparative Example 4
[0070] This example follows the coloring method of Example 1, but modifies step S4.
[0071] S1. Oak with a tannin content of 4% is selected as the raw material for processing flooring;
[0072] S2. Apply a 5% ferrous sulfate solution to the floor surface. After it dries completely, the color precipitates on the floor surface, turning it dark blue.
[0073] S3. Apply 1% hydrogen peroxide to the floor surface. After it dries completely, the color settles on the floor surface, giving it a deep yellow color.
[0074] S4. Apply a 20% sodium hydroxide solution to the floor surface. After it dries completely, the color will settle on the floor surface, and the color of the floor surface will be close to the original color of the wood.
[0075] S5. Apply a mixed solution of calcium carbonate and water to the floor surface, wherein the ratio of calcium carbonate to water is 1:2. After it dries completely, the color is deposited on the floor surface, and the floor surface appears light gray.
[0076] S6. Apply a water-based color-preserving agent to the floor surface for color preservation treatment. After drying, the color of the floor surface does not change significantly. The product in this example is then processed using normal flooring processing techniques to obtain the finished product, which is marked as m6.
[0077] Comparative Example 5
[0078] This example follows the coloring method of Example 1, but modifies step S5.
[0079] S1. Oak with a tannin content of 4% is selected as the raw material for processing flooring;
[0080] S2. Apply a 5% ferrous sulfate solution to the floor surface. After it dries completely, the color precipitates on the floor surface, turning it dark blue.
[0081] S3. Apply 1% hydrogen peroxide to the floor surface. After it dries completely, the color settles on the floor surface, giving it a deep yellow color.
[0082] S4. Apply a 10% sodium hydroxide solution to the floor surface. After it dries completely, the color settles on the floor surface, giving it a light yellow color.
[0083] S5. Apply a mixed solution of calcium carbonate and water to the floor surface, wherein the ratio of calcium carbonate to water is 1:3. After it dries completely, the color is deposited on the floor surface, and the floor surface appears light gray.
[0084] S6. Apply a water-based color-preserving agent to the floor surface for color preservation treatment. After drying, the color of the floor surface does not change significantly. The product in this example is then processed using normal flooring processing techniques to obtain the finished product, which is marked as m7.
[0085] In this embodiment, the light gray of the floor surface in S5 is lighter than the light gray of the floor surface in S5 in Comparative Example 4.
[0086] Comparative Example 6
[0087] This example follows the coloring method of Example 1, except that the drying method in steps S1-S5 is changed.
[0088] S1. Oak with a tannin content of 4% is selected as the raw material for processing flooring;
[0089] S2. A 5% ferrous sulfate solution is applied to the floor surface and dried using a drying air at 40°C. The color is deposited on the floor surface, giving it a dark blue color.
[0090] S3. Apply 1% hydrogen peroxide to the floor surface and dry it with a drying air at 40℃. The color will be deposited on the floor surface, and the floor surface will appear dark yellow.
[0091] S4. Apply a 10% sodium hydroxide solution to the floor surface and dry it with a 40°C drying air. The color will precipitate on the floor surface, giving it a light yellow color.
[0092] S5. Apply a mixed solution of calcium carbonate and water to the floor surface, wherein the ratio of calcium carbonate to water is 1:2. After drying with a drying air at 40℃, the color is deposited on the floor surface, and the floor surface appears as jade gray.
[0093] S6. Apply a water-based color-preserving agent to the floor surface for color preservation treatment. After drying, the color of the floor surface does not change significantly. The product in this example is then processed using normal flooring processing techniques to obtain the finished product, which is marked as m8.
[0094] in,
[0095] In this embodiment, the dark blue color of the floor surface in S2 is slightly lighter and paler than that of the floor surface in S2 in embodiment 1, and there is a visual difference.
[0096] In this embodiment, the dark yellow color of the floor surface in S3 is slightly lighter and paler than that of the floor surface in S3 in embodiment 1, and there is a visual difference.
[0097] In this embodiment, the light yellow color of the floor surface in S4 is slightly lighter and paler than that of the floor surface in S4 in embodiment 1, and there is a visual difference.
[0098] In this embodiment, the jade gray color of the floor surface in S5 is slightly lighter and paler than that of the floor surface in S5 in embodiment 1, and there is a visual difference.
[0099] In summary, based on the above cases,
[0100] m1-m8 are the final flooring products obtained after coloring. Comparing the appearance of m1-m8.
[0101] The surface of m1 is jade gray, and the wood grain pattern is clearly visible on the surface.
[0102] The surface of m2 is jade gray, and the wood grain pattern is clearly visible on the surface.
[0103] The surface of m3 is grayish-green, and the wood grain is clearly visible on the surface.
[0104] The surface of m4 is grayish-green, and the wood grain is clearly visible.
[0105] The surface of the m5 is dark gray, and the wood grain is clearly visible.
[0106] The surface of the m6 is light gray, and the wood grain pattern is clearly visible.
[0107] The surface of the m7 is light gray, and the wood grain pattern is clearly visible.
[0108] The surface of the m8 is jade gray, and the wood grain pattern is clearly visible on the surface.
[0109] M1, M2, and M8 are all jade gray, but to the naked eye, there is no difference in color between M1 and M2. M8, however, is slightly lighter in color than both M1 and M2.
[0110] The coloring method, which involves coloring the floor surface and its penetration layer, reveals the original texture of the wood. Using the coloring method of this invention, after several color changes, various products eventually settle on the floor surface and appear as a jade gray color. This gives the visual impression that the color is the natural color of the wood that grows on the floor surface, returning to nature.
[0111] Although embodiments of the present invention have been shown and described above, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A method for coloring oak flooring to a jade gray color, characterized in that, Includes the following steps, S1. Oak with a tannin content of 4%-16% is selected as the raw material for processing flooring; S2. Before the surface oiling and painting processes in the flooring manufacturing process, a ferrous sulfate solution is applied to the flooring surface and allowed to air dry naturally. The concentration of the ferrous sulfate solution is 5%. S3. Apply an oxidizing agent to the floor surface for oxidation treatment, and allow it to air dry naturally. The oxidizing agent is hydrogen peroxide with a concentration of 1% to 1.3%. S4. Apply bleach to the floor surface for bleaching treatment, and allow it to air dry naturally. The bleach is a 10% sodium hydroxide solution. S5. Apply a reducing agent aqueous solution to the floor surface for ion neutralization, allow it to air dry naturally, and then polish the floor surface. The reducing agent aqueous solution is a mixed solution formed by adding calcium carbonate to water and stirring, wherein the ratio of calcium carbonate to water is 1:
2. S6. Apply a water-based color-preserving agent to the floor surface for color preservation treatment, and after drying, use it for surface oiling and painting processes in the floor processing.
2. The coloring method according to claim 2, characterized in that, The natural ventilation drying described in steps S1-S5 involves completely exposing the coated surface to air.
3. The coloring method according to claim 3, characterized in that, The drying process in step S6 is a through-type drying, with the drying temperature controlled between 25℃ and 40℃.