A waterproof fabric color fastness detection device
By designing an automated color fastness testing device for waterproof fabrics, the problems of cumbersome testing process and safety hazards were solved, achieving efficient and safe automated testing and waste liquid treatment, and improving testing accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SIMAI (WEIHAI) NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-07-07
AI Technical Summary
The existing process for testing the color fastness of waterproof fabrics is cumbersome, inefficient, and poses safety hazards. In particular, the splashing of acid and alkali solutions during manual washing of fabric strips poses a threat to the test personnel, and the disposal of waste liquids increases the difficulty of the test.
A color fastness testing device for waterproof fabrics was designed, including a test chamber, an acid and alkali testing mechanism, a washing mechanism, and a sewage discharge system. The device achieves automated control by automatically adding and discharging acid and alkali solutions through an inlet pipeline system and a sewage discharge system, and by using the washing mechanism to simulate the fabric washing process to achieve automated testing.
It improved testing efficiency, reduced operational steps, enhanced safety, reduced human intervention, reduced errors, improved testing accuracy, and enabled automated waste liquid treatment.
Smart Images

Figure CN224471515U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of color fastness testing technology for waterproof fabrics, and particularly relates to a color fastness testing device for waterproof fabrics. Background Technology
[0002] Waterproof fabric is a type of fabric with certain waterproof properties. When processed into garments, these garments possess a degree of water resistance. Waterproof fabric undergoes a dyeing process to acquire its color. Because waterproof garments possess these properties, consumers often utilize them for wearing in rainy weather.
[0003] Therefore, the colorfastness requirements for waterproof fabrics are higher than those for conventional fabrics. For example, waterproof fabrics need to maintain their colorfastness under certain acid and alkali solution immersion tests to ensure that garments can withstand frequent soaking in acid rain and maintain stable colorfastness.
[0004] The current testing method involves immersing the fabric in acidic or alkaline solutions of varying concentrations. During the experiment, the fabric needs to be continuously washed by the testing personnel. Therefore, the fabric testing environment requires operators to prepare acidic or alkaline solutions of specific concentrations in containers, and solutions need to be prepared for each test. A certain testing time needs to be maintained during the process; for example, after testing in one acidic concentration environment, the fabric needs to be immersed again in an environment with a different acidic concentration.
[0005] Therefore, the entire testing process relies on manual operation by the operator, which is not only cumbersome, but also requires a certain amount of time for soaking during the test, and the test fabric strips need to be washed during the soaking process, making the test operation very cumbersome.
[0006] Therefore, in actual testing, using a highly automated testing device to replace traditional manual testing not only greatly improves efficiency but also significantly enhances testing safety. For example, during the traditional manual washing of fabric strips, the splashing of acid and alkali solutions poses a certain safety hazard to the experimental personnel.
[0007] Meanwhile, the preparation of acid and alkali solutions used in the testing process and the treatment of waste liquid after the test are also factors that increase the difficulty of the test. Utility Model Content
[0008] Based on the above background, the purpose of this utility model is to provide a device for testing the color fastness of waterproof fabrics.
[0009] To achieve the above objectives, the present invention adopts the following technical solution:
[0010] A color fastness testing device for waterproof fabrics includes a test chamber, wherein an acid and alkali testing mechanism is assembled and connected inside the test chamber.
[0011] The acid-base testing apparatus includes an acid-base liquid tank system, an impregnation container system for impregnating waterproof fabric, an inlet pipeline system for pumping acid-base liquid from the acid-base liquid tank system into the impregnation container system, and a sewage discharge system for discharging wastewater from the impregnation container system.
[0012] It also includes a pendulum mechanism that drives the test fabric, through which the test fabric is pendulum-swept in the immersion container system and moved to switch between different acid and alkaline environments for testing.
[0013] Preferably, the acid and alkali solution tank system includes a first tank, a second tank, a third tank, and a fourth tank for containing acid solutions and alkali solutions of different concentrations.
[0014] Preferably, the acid and alkali solution tank system is installed on the top of the test chamber;
[0015] The top of the test chamber is equipped with a bracket for fixing the first tank, the second tank, the third tank, and the fourth tank;
[0016] The tops of the first tank, the second tank, the third tank, and the fourth tank are respectively connected to an inlet pipe system. The inlet pipe system includes a main pipe and four branch pipes connected to the main pipe. The branch pipes are connected to the corresponding tanks.
[0017] Valves are installed on the branch pipe.
[0018] Preferably, the impregnation container system includes a first container, a second container, a third container, and a fourth container, respectively corresponding to the first tank, the second tank, the third tank, and the fourth tank;
[0019] The liquid inlet pipeline system includes liquid inlet pipes that are respectively connected to the lower ends of the first tank, the second tank, the third tank, and the fourth tank, and the liquid outlet ends of the liquid inlet pipes are respectively connected to the lower ends of the corresponding first container, the second container, the third container, and the fourth container.
[0020] A control valve is installed on the inlet pipe.
[0021] Preferably, a support base is installed in the middle part of the test chamber, and the first container, the second container, the third container, and the fourth container are installed on the support base.
[0022] Preferably, the sewage system includes sewage pipes that are respectively connected to the lower ends of the first container, the second container, the third container, and the fourth container;
[0023] It also includes a wastewater tank located inside the test chamber;
[0024] The outlet end of the sewage pipe is located inside the sewage tank;
[0025] The sewage pipe is equipped with a sewage valve.
[0026] Preferably, the oscillating mechanism is positioned above the immersion container system;
[0027] This includes a driven shaft and a driving shaft that are rotatably connected to the two side walls of the test chamber, respectively;
[0028] A driven pulley and a driving pulley are respectively fixedly installed on the driven shaft and the driving shaft;
[0029] A transmission belt is connected between the driven pulley and the driving pulley.
[0030] It also includes a motor that drives the drive shaft to rotate, the motor being mounted on the outer wall of the test chamber;
[0031] The lower belt section of the drive belt is fitted with test fabric.
[0032] Preferably, the lower belt portion of the transmission belt is fixedly connected to a mounting component for mounting the test fabric;
[0033] The mounting component includes a mounting sleeve that is fitted onto the drive belt, and the mounting sleeve is fixed onto the drive belt by rivets;
[0034] The bottom of the mounting sleeve is fixedly connected to a U-shaped bracket, and a locking screw for locking the test fabric is threaded onto the U-shaped bracket.
[0035] Preferably, the driven shaft and the driving shaft are rotatably connected to bearings at both ends, and the bearings are fixedly installed on the inner side wall of the test chamber.
[0036] Preferably, the first and second tanks contain acidic liquids of different concentrations, and the third and fourth tanks contain alkaline liquids of different concentrations.
[0037] This utility model has the following beneficial effects:
[0038] 1. By designing a new testing system, including a container system and a tank system, a highly automated testing method is achieved. During the testing process, only the corresponding valve needs to be opened to add the test liquid to each corresponding container. This method completely eliminates the need for manual liquid preparation, which not only greatly reduces the number of testing steps and improves testing efficiency, but also significantly shortens the pre-test preparation work by adding the test liquid in a short time.
[0039] 2. The test fabric is switched between different test containers using a pendulum mechanism, enabling complex testing experiments to be completed automatically. Simultaneously, the pendulum mechanism also allows the test fabric to swing back and forth in the immersion container using a drive belt during the test, mimicking the washing process of clothing. This achieves fully automated testing, significantly improving efficiency while eliminating the need for extensive manual intervention.
[0040] 3. Enables testing of multiple test fabric strips, and enables simultaneous testing of test fabric strips as experimental groups and qualified fabric strips as reference groups. The advantage of simultaneous testing is that it greatly reduces testing errors and improves testing accuracy.
[0041] 4. A pipeline system was designed, including liquid inlet and sewage outlet, to automatically introduce test liquid during the testing process and automatically discharge and collect sewage after the test is completed. Attached Figure Description
[0042] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0043] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model;
[0044] Figure 2 This is a schematic diagram of the structure of the test chamber for installing the pendulum mechanism in an embodiment of this utility model;
[0045] Figure 3 This is a schematic diagram of the structure of the pendulum mechanism in an embodiment of this utility model;
[0046] Figure 4 This is a schematic diagram of the structure of the mounting component in an embodiment of this utility model;
[0047] Figure 5 This is a schematic diagram of the structure of the test chamber with the door installed in an embodiment of this utility model;
[0048] Figure 6 This is an embodiment of the present utility model. Figure 3 A structural diagram from another perspective.
[0049] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0050] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0051] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0052] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0053] Example 1
[0054] like Figure 1-6 As shown, a color fastness testing device for waterproof fabric includes a test chamber 1. The test chamber 1 is a conventional chamber structure disclosed in the prior art. Its main structure is a chamber and a door is hinged to the outside of the chamber. According to the existing method, the door includes a hinged frame and a transparent side glass plate installed on the frame to facilitate the operator to pass through the test conditions inside the chamber.
[0055] The test chamber 1 is divided into upper and lower chamber cavities by the support base 12 (partition). The upper chamber cavity is used to install the immersion container system, and the lower chamber cavity is used to house the wastewater tank. After the test is completed, the acid and alkaline wastewater is discharged into the wastewater tank (for subsequent environmental treatment).
[0056] To address the challenges of immersion tests in acid and alkali solutions of varying concentrations during color fastness testing of fabrics, this invention provides an improved testing system (i.e., an acid and alkali testing mechanism).
[0057] The acid and alkali testing facility includes an acid and alkali liquid tank system, an impregnation container system for impregnating waterproof fabrics, an inlet pipeline system for pumping acid and alkali liquids from the acid and alkali liquid tank system into the impregnation container system, and a sewage discharge system for discharging wastewater from the impregnation container system.
[0058] During the testing process, the fabric strips were first tested in an acidic environment, and then in an alkaline environment.
[0059] Specifically, the acid and alkali tank system includes a first tank, a second tank, a third tank, and a fourth tank that contain acid solutions of different concentrations and alkali solutions of different concentrations.
[0060] The installation method is as follows: Following the existing fixed installation method for tanks, the acid and alkali solution tank system is installed on the top of the test chamber 1. Specifically, a bracket 11 is installed on the top of the test chamber 1 to fix the first tank 31, the second tank 32, the third tank 33, and the fourth tank 34 (the bottom of the bracket 11 is fixed to the top of the test chamber 1 by means of a bracket rod). According to the existing method, the bracket 11 has mounting holes for installing the tanks. Following the existing method, the tanks are confined within the mounting holes, and the tanks are supported on the top of the test chamber 1.
[0061] Specifically, depending on the testing requirements, the first tank 31 and the second tank 32 contain acidic solutions of different concentrations (tested in order from low to high concentration). Similarly, the third tank and the fourth tank contain alkaline solutions of different concentrations.
[0062] The first tank 31, the second tank 32, the third tank 33, and the fourth tank 34 are tanks with a volume of 1-5L, which are small tanks disclosed in the prior art. According to the existing method, the acid and alkali solutions in the first tank 31, the second tank 32, the third tank 33, and the fourth tank 34 are connected to an external supply tank (for containing the test solution) for the corresponding test solution. Specifically, the tops of the first tank 31, the second tank 32, the third tank 33, and the fourth tank 34 are respectively connected to an inlet pipe system. The inlet pipe system includes a main pipe 35 and four branch pipes 351 connected to the main pipe 35. The branch pipes 351 are connected to the corresponding tanks; valves are installed on the branch pipes.
[0063] The main pipeline is connected to four external feeding tanks (not shown in the diagram) in the existing manner. The specific connection method is a conventional method disclosed in the prior art, such as each external feeding tank being connected to the main pipeline by a single pipeline. The feeding method and principle of the external feeding tanks are conventional methods disclosed in the prior art, such as using potential energy difference (height difference) for feeding or using a liquid pump for feeding in the existing manner.
[0064] During the testing experiment, if the amount of test liquid in the first tank 31, the second tank 32, the third tank 33, and the fourth tank 34 is insufficient, the test liquid should be replenished in a timely manner.
[0065] Correspondingly, the impregnation container system includes a first container 37, a second container, a third container, and a fourth container, which correspond to the first tank 31, the second tank 32, the third tank 33, and the fourth tank 34, respectively.
[0066] The containers are positioned in the middle of the test chamber. Specifically, they are fixed in the existing manner, with a support base 12 installed in the middle of the test chamber 1. The first container 37, the second container, the third container, and the fourth container are mounted on the support base 12.
[0067] The first container 37, the second container, the third container, and the fourth container are wide-mouth glass containers disclosed in the prior art (i.e., the bottle opening is enlarged to facilitate the entry of the test fabric strip).
[0068] Meanwhile, the liquid inlet pipeline system includes a liquid inlet pipe 36 that is connected to the lower ends of the first tank 31, the second tank 32, the third tank 33, and the fourth tank 34 respectively. The liquid outlet end of the liquid inlet pipe 36 is connected to the lower ends of the corresponding first container 37, the second container, the third container, and the fourth container respectively. A control valve is installed on the liquid inlet pipe 36.
[0069] During the test, acid and alkali solutions are pumped from the corresponding tanks into the corresponding containers (using the height difference for pumping). During pumping, the test solution enters through the corresponding inlet pipe (control valve opening). This is preparation for the immersion experiment.
[0070] The aforementioned container and tank systems enable highly automated testing. During the testing process, simply opening the corresponding valve allows the addition of the test liquid to each container. This method completely eliminates the need for manual liquid preparation, significantly reducing testing steps and improving efficiency. Even more importantly, the entire testing system can add the test liquid in a short time, greatly shortening the pre-test preparation work.
[0071] Example 2
[0072] like Figure 1-6 As shown, in this embodiment, based on the structure of Embodiment 1, an improved drive structure is used to achieve automatic washing of the test fabric strip and transfer of the test fabric strip 5 between different test containers during the testing process. For example, after completing the test in the first container 37, it can automatically enter the second test container for testing. The entire process does not require the experimental personnel to touch the fabric strip corroded by acids and alkalis.
[0073] Specifically, the color fastness testing device for waterproof fabrics also includes a swing mechanism 4 that drives the test fabric. The test fabric is swung and moved in the immersion container system and switched between different acid and alkaline environments through the swing mechanism 4.
[0074] Specifically, the pendulum mechanism 4 is positioned above the immersion container system (maintaining a safe distance from the immersion container system). The pendulum mechanism 4 includes a driven shaft and a driving shaft, which are rotatably connected to the left and right side walls inside the test chamber 1, respectively. Specifically, according to the existing rotating shaft connection method, bearings 42 are rotatably connected to both ends of the driven shaft and the driving shaft, and according to the existing bearing fixing method, the bearings 42 are fixedly installed on the inner side walls of the test chamber 1 (specifically, such as the front and rear sides of the left side wall and the front and rear sides of the right side wall).
[0075] Meanwhile, a driven pulley 44 and a driving pulley are fixedly installed on the driven shaft and the driving shaft respectively; according to the existing belt drive method, a transmission belt 41 is connected between the driven pulley 44 and the driving pulley; the transmission belt 41 is located directly above the container.
[0076] Similar to existing belt drive structures, it also includes a motor 45 that drives the drive shaft to rotate. The motor 45 is mounted on the outer wall of the test chamber 1. As in existing methods, the output shaft of the motor 45 is mounted on the drive shaft via a coupling. This enables belt drive under the drive of the motor 45.
[0077] The transmission belt 41 is divided into upper and lower belt layers. Specifically, the lower belt layer of the transmission belt 41 is fitted with test fabric.
[0078] During the test, the fabric strip to be tested is fixedly installed on the lower belt of the transmission belt 41. At this time, the transmission belt 41 moves with the drive of the motor 45. When the transmission belt 41 drives the fabric strip to the position of the first container 37, the lower end of a certain length of fabric strip (flexible material) extends into the first container 37 (the container is a wide-mouth container with a large opening, which makes it easier for the fabric strip 5 to be inserted). During the immersion process, the motor 45 drives the drive pulley to rotate back and forth (the motor 45 is a conventional reciprocating servo motor 45 disclosed in the prior art). During the reciprocating rotation, the transmission belt 41 drives the fabric strip 5 to swing back and forth in the immersion solution, forming a wagging motion, thereby increasing the effect of the immersion solution on the fabric strip (simulating the fabric washing process).
[0079] Once the impregnation in the first container 37 is complete, the motor 45 starts working and continues to carry the fabric strip to the second container, repeating the above operation until the impregnation in the last container is completed.
[0080] During the experiment, because the fabric strip has a certain length, its lower part is immersed in the container. After the test is completed, the operator takes out the fabric strip (opens the box door) and compares the color fastness of the immersed part to judge the color fastness.
[0081] Using motor 45 to drive the transmission belt for a certain distance and then stopping is the conventional function of existing drive motor 45 (servo motor 45), and it is also the conventional application of servo motor 45 based on this function.
[0082] Those skilled in the art can understand the specific working principle of the motor 45 driving the transmission belt for a certain distance and then stopping (immersion between different containers) by consulting technical manuals and dictionaries.
[0083] Example 3
[0084] like Figure 1-6 As shown, based on the structure of Example 2, this embodiment makes the following improvements to increase the number of test fabric strips 5, such as testing a certain number of test fabric strips 5 simultaneously with the qualified product fabric, to achieve multiple sets of tests and control tests:
[0085] The lower belt portion of the transmission belt 41 is fixedly connected to an installation component for mounting the test fabric; the installation component includes an installation sleeve 43 that is sleeved on the transmission belt 41, and the installation sleeve 43 is fixed to the transmission belt 41 by rivets.
[0086] Meanwhile, a U-shaped bracket 431 is fixedly connected to the bottom of the mounting sleeve 43, and a locking screw 4311 for locking the test fabric is threaded onto the U-shaped bracket 431.
[0087] During the test, a certain number of fabric strips were kept flush at the top and then inserted into the U-shaped groove of the U-shaped holder 431, pressing the upper end of the fabric strips with the locking screw 4311. Since the fabric strips are flexible, the screw pressing method can keep the upper end of the fabric strips fully locked and positioned.
[0088] This method increases the number of experimental groups and allows for simultaneous comparison with the control group (qualified fabric). This significantly improves experimental efficiency while increasing the accuracy of experimental testing (simultaneous testing minimizes experimental error).
[0089] Example 4
[0090] like Figure 1-6As shown, this embodiment is based on the structure of embodiment 3. After the test is completed, in preparation for the next set of tests, it is necessary to drain the wastewater from the test container to facilitate the replacement of the new test solution. Therefore, in order to deal with the wastewater treatment, the above-mentioned sewage system includes sewage pipes 38 that are respectively connected to the lower ends of the first container 37, the second container, the third container, and the fourth container; it also includes a sewage tank set in the test chamber 1; the outlet end of the sewage pipe 38 is located in the sewage tank 39; and a sewage valve is installed on the sewage pipe 38.
[0091] During the sewage discharge process, the sewage valve is opened to discharge the sewage into the sewage tank.
[0092] Once the sewage tank is full, the tank door is opened in the existing manner, and the sewage tank 39 is removed from the tank and dumped.
[0093] Example 5
[0094] like Figure 1-6 As shown, in this embodiment, based on the structure of embodiment 4, to further achieve automated processing, all the valves mentioned above are solenoid valves. In actual operation, according to the existing method, a control box is fixedly installed on the side of the test box 1, the button for controlling the solenoid valve is arranged on the panel of the control box, and the control circuit is installed in the control box.
[0095] Electromagnetic valves are controlled by conventional control methods disclosed in existing technologies through circuit structure.
[0096] During operation, pressing the button corresponding to the solenoid valve to open or close it is the conventional control structure and method for solenoid valves in the existing technology.
[0097] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.
Claims
1. A device for testing the color fastness of waterproof fabrics, characterized in that, Includes a test chamber, and an acid-base testing mechanism is assembled and connected inside the test chamber; The acid-base testing apparatus includes an acid-base liquid tank system, an impregnation container system for impregnating waterproof fabric, an inlet pipeline system for pumping acid-base liquid from the acid-base liquid tank system into the impregnation container system, and a sewage discharge system for discharging wastewater from the impregnation container system. It also includes a pendulum mechanism that drives the test fabric, and the test fabric is tested by pendulum swinging and moving in the immersion container system and switching between different acid and alkali environments. The acid and alkali solution tank system includes a first tank, a second tank, a third tank, and a fourth tank to contain acid solutions and alkali solutions of different concentrations. The impregnation container system includes a first container, a second container, a third container, and a fourth container, respectively corresponding to the first tank, the second tank, the third tank, and the fourth tank; The liquid inlet pipeline system includes liquid inlet pipes that are respectively connected to the lower ends of the first tank, the second tank, the third tank, and the fourth tank, and the liquid outlet ends of the liquid inlet pipes are respectively connected to the lower ends of the corresponding first container, the second container, the third container, and the fourth container. A control valve is installed on the inlet pipe; The oscillating mechanism is positioned above the immersion container system; This includes a driven shaft and a driving shaft that are rotatably connected to the two side walls of the test chamber, respectively; A driven pulley and a driving pulley are respectively fixedly installed on the driven shaft and the driving shaft; A transmission belt is connected between the driven pulley and the driving pulley. It also includes a motor that drives the drive shaft to rotate, the motor being mounted on the outer wall of the test chamber; The lower belt section of the drive belt is fitted with test fabric.
2. The waterproof fabric color fastness testing device according to claim 1, characterized in that, The acid and alkali solution tank system is installed on the top of the test chamber; The top of the test chamber is equipped with a bracket for fixing the first tank, the second tank, the third tank, and the fourth tank; The tops of the first tank, the second tank, the third tank, and the fourth tank are respectively connected to an inlet pipe system. The inlet pipe system includes a main pipe and four branch pipes connected to the main pipe. The branch pipes are connected to the corresponding tanks. Valves are installed on the branch pipe.
3. The waterproof fabric color fastness testing device according to claim 1, characterized in that, A support base is installed in the middle of the test chamber, and the first container, the second container, the third container, and the fourth container are installed on the support base.
4. The waterproof fabric color fastness testing device according to claim 1, characterized in that, The sewage system includes sewage pipes that are respectively connected to the lower ends of the first container, the second container, the third container, and the fourth container; It also includes a wastewater tank located inside the test chamber; The outlet end of the sewage pipe is located inside the sewage tank; The sewage pipe is equipped with a sewage valve.
5. The waterproof fabric color fastness testing device according to claim 1, characterized in that, The lower belt section of the transmission belt is fixedly connected to a mounting component for mounting the test fabric. The mounting component includes a mounting sleeve that is fitted onto the drive belt, and the mounting sleeve is fixed onto the drive belt by rivets; The bottom of the mounting sleeve is fixedly connected to a U-shaped bracket, and a locking screw for locking the test fabric is threaded onto the U-shaped bracket.
6. The waterproof fabric color fastness testing device according to claim 1, characterized in that, The driven shaft and the driving shaft are rotatably connected to bearings at both ends, and the bearings are fixedly installed on the inner side wall of the test chamber.
7. The waterproof fabric color fastness testing device according to claim 1, characterized in that, The first and second tanks contain acidic liquids of different concentrations, and the third and fourth tanks contain alkaline liquids of different concentrations.