First, Cross- Cutting Testing Procedure:

1. To cut a 10X10MM coated surface (flat) into 100 grids with a sharp knife, with each grid occupying an area of 1 mm2 (make sure all the incisions should show the base material and the cuts should not be tilted)

2. To attach 3M adhesive tape to the cut surface and press it tight with your finger, and then rapidly pull up the tape in a vertical direction.

3. To repeat the action for three times along the same direction, please note that each time new tape should be used.

4. To rotate the material for 90 degrees, and test the coated material for three times in the same way, please note that each time new tape should be used.

5. To observe how much coating has been peeled off from the grids.

Determination: A cross- cutting test is successful if no coating has peeled off from the grids (and the result is acceptable if no more than 10% of the coating is peeled off)

Second, Fingernail Scratch Testing Procedures:

1. To cut open 20 deep marks on a coated surface (flat) with a sharp knife ( 10 vertically and 10 horizontally), each with a length of 10mm. (make sure all the incisions should show the base material)

2. To scratch horizontally on the coating with nails.

3. To observe how much coating has been peeled off.

Determination: The coating is qualified if no coating has been peeled off.

Third, Boiling Water Testing Procedures:

1. Make sure the product has successfully gone through the cross-cut test.

2. to choose two other sections of the product and conduct cross-cutting again and then boil the product for 30 minutes (make sure the product is completely submerged and the water will always be boiling)

3. After the product is completely cooled, remove the product and dry the water stains.

4. To conduct 3M tape test and the nail scratching test on these two sections.

5. To observe the condition of coating.

Determination: If there has been no wrinkling and peeling off in the coating, the coating has gone through the boiling water test.

Fourth, the Reliability Testing Procedures

1. To assemble the electrical-heating plate into the machine?and conduct reliability test on the coated surface under a fixed temperature.

2. For Sandwich-maker series, waffle-maker series, and hamburger maker series, the average temperature should be 220±20?.

3. For cooking iron series the temperature should be 260?±20?

4. For the electric iron the surface temperature should be 230?±20?

5. Set these products on for ten hours followed by power dump at night for 14 hours, and that is regarded as a cycle. The test should last for 7 cycles continuously.

Determination: After the test, there should not have been significant color changes, scorch, bubble, crack and peeling off of the coating, melt of the coating (the base material of the electric hot tray is exposed )or other phenomena on the coated surface.

Fifth, the Long-term Testing Procedures

1. If the machine has successfully gone through the reliability test and the coated surface is reconfirmed under the fixed temperature, it should be on the long-term lifetime testing for 760 cycles continuously, with a cycle of power on an hour and off an hour.

2. Determination: After the test, there should not have been significant color changes, scorch, bubble, crack and peeling off of the coating, melt of the coating (the base material of the electric hot tray is exposed )or other phenomena on the coated surface.

Sixth, Salinification Testing Procedures?

Immersion

1. To immerse the product into 3 percent NACL for 24 hours.

2. To remove the product, dry the water stains and observe if there is quality abnormity. Conduct cross- cutting test and nail scratching test.

Boiling

1.  To pour an appropriate amount of 3 percent NACL solution into the coated electric hot tray

2.  To switch on the electric hot tray till the water dries out. After that, pour an appropriate amount of solution again and wait for the water dries out.

3.  To pour some solution a third time and heat it till steaming appears. Cut off the power as soon as the steaming appears and lay it aside for 24 hours.

4.  To pour the remaining solution away and dry the water stains. Conduct cross- cutting test and nail scratching test.

5.  Determination: It is qualified if there has been no peeling off or wrinkling in the test of the coating.

Seventh, Pencil Hardness Testing Procedures:

1.To sharpen a pencil with 2 to 3 mm of the lead revealed

2.  To lay an abrasive paper on a flat table and grind the lead on it with the pencil vertically downwards.

3. To select a center on a smooth part of the coating and move the pencil more than 20mm forward on the coated surface with the angle of 45 degrees.

4. To rotate the pencil 120 degrees and move more than 20mm forward parallelly.

To rotate the pencil 120 degrees again and move more than 20mm parallelly. 3 marks have been left on the coated surface.

5. To rub the three marks with a rubber and observe the condition of the coated surface.

6. Determination: If the marks can be rubbed totally and leave no marks at all, the coating has gone through the pencil hardness test.

 Eighth, Boiling Soy Sauce Testing Procedures:

1. To add some ordinary edible oil into the electric hot tray.

2. To close and switch on the electric hot tray to fry till the soy sauce dries out. Add an appropriate amount of soy sauce to fry again for test.

To fry for test continuously for 1.5 hours, then shut down the power and open the electric hot tray. Wash it with cold water after it cools down and dry the water stains with a piece of calico. Conduct cross- cutting test.

3. To observe the condition of the electric hot tray.

4.  Determination: The electric hot tray is qualified if there are no marks on the surface of it and it has gone through the cross- cutting test.

Comments: Hardness 2H should be used for Bakelite parts and metal parts.

Hardness HB or B should be used for injection molding parts.

Ninth, Paper Towel Wiping Testing Procedures:

1. To wipe with a piece of paper towel on the surface of the coated electric hot tray under the pressure of 2.5-3.5 KGF 30 times for 15 seconds.

2. To observe the condition of the paper towel after wiping.

3. Determination: It is qualified if there are no visible color off of the coated surface.

Tenth, PE Bag Baking Testing Procedures:

1. To place a PE bag into the electric hot tray and make sure it is smooth and clings to the surface of the electric hot tray.

2. To put the electric hot tray on the baking test bed and switch the power on.

3. As soon as the PE bag is burning, cut off the power.

4. To pull up the PE bag lightly after the electric hot tray cools off.

5. Determination: It is qualified if the PE bag can be pulled up lightly and there are no marks left on the surface of it.

11th, Waffle-baking Test:

1. To preheat the baking tray for a cycle. After mixing waffle powder with water and stirring the mixture uniformly (the volumetric ratio is 1:2), pour an appropriate amount of the mixture into the electric hot tray (the size should be less than 2/3 of the design volume of the baking tray die.)

2. To switch the power on and fry for a cycle or more and take out the waffle.

3. To observe the condition of the electric hot tray surface and the waffle.

4. Determination: It has gone through the non-stick test if the waffle does not stick on the electric hot tray every time the electric hot tray is opened.

 12th, Hot pot Corrosion-resistant Testing Procedures:

1. To pour the material for chaffy dish into the hot pot and add water to the highest water level. Turn the power on and test continuously for 8 hours. The hot pot should maintain the boiling state and the water in the pot should be at least 1/3 water volume.

2. To heat the product for 8 hours and leave it to stand for 6 hours after cutting the power off and taking the food out, and that is regarded a cycle. (Generally speaking, the product should be heat for 8 hours in the day and leave it to stand for 16 hours at night.)

3. test time:

If the product is sold to Japan, it should be test continuously for 2 cycles.

If the product is sold in China, it should be test continuously for 6 cycles. The material for the test should be Sichuan hotpot seasoning. Once a day, sparerib, radish, green vegetables and sugar should be added into the hot pot and the food should boil.

4. Determination: To clean the aluminum pot and have it dried. It is qualified if there are no abnormal changes such as oxidation, peeling off or wrinkling in the coating.

13th,  the Wear Test Program:

1. To fix the electric iron on the wear life instruments.

2. To make the handle of the electric iron under the pressure of 2.5-3.5 KGF and make sure that the chassis clings to the cotton cloth on the plate.

3. When the electric hot tray touches the cotton cloth, turn up the temperature to the maximum level. At the same time, the electric hot tray starts heating and the steaming button should be pressed.

4. The electric iron should move back and forth at the rate of 12-15m per minute, and the cumulative distance is 10,000m.

5. To observe the condition of the coating surface.

Determination: It is qualified if the coating does not peel off and the aluminum material is not revealed.

First, Coating Adhesion Cross- Cutting Test

First of all, clean the surface of product for test with a piece of cotton cloth. Then cut a 10*10mmcoated surface (flat) into 100 grids with a sharp knife, with each grid occupying an area of1 mm*1mm(make sure all the incisions should show the base material and the cuts should not be tilted). After that, attach3M600 adhesive tape to the cut surface and press it tight with your finger, and then pull up the tape at an angle of 60° within the time of 0.5-1 second. Repeat the action for three times continuously at
the same position, please note that each time new tapes should be used. At last, rotate the material for 90 degrees and test the coated material for three times in the same way, please note that each time new tapes should be used

Determination: Observe how much coating has been peeled off from the grids. If no coating has peeled off from the grids, the test is successful; if the area of peeling off is more than 15 percent, the result of the test is not good. 

Second, Coating Adhesion Fingernail Scratch Test

1. First, clean the coating surface, then cut deep marks on a coated surface (flat) with a sharp knife ( 10 vertically and 10 horizontally), each with a length of10mm. (make sure all the incisions show the base material)

2. To scratch horizontally on the coating with the nail of thumb.

3. To scratch vertically on the coating with the nail of thumb.

Third, Coating Adhesion Pencil Hardness Test

1. To cut off the wooden part of one end of the pencil with a knife and leave the obtuse part that has not been cut, thus there is no need for a fixed device of the lead.

2. To lay an abrasive paper on a flat table and grind the pencil on it vertically with the front-end of the lead and the side wall vertical. Remove the leftover of the side of the pencil’s lead with hand.

3.To fix the product to be tested on a flat and choose a pencil which is harder than the test surface.

Hold the pencil in the way a pen usually be held and press the point of the pencil close to the coating surface at an angle of 45°.

4. To keep the pencil an angle of 45°and scratch it on the coating surface for 1/4 inch with a uniform force. The target is to penetrate through the coating surface into the base material. The test should be stop if the leap is broken.

5. To examine the coating surface. If there are scratches left on the coating surface or it is penetrated by the pencil, choose another pencil a level softer and repeat the test procedures 3-4 till the pencil does not penetrate through the coating surface.

6. To rub the marks left by pencils with a rubber.

Forth, Impact Resistance Test

To assemble spare parts into a machine with rigid bracing. Set the impact bar to 0.5 joule and impact the most vulnerable spot of the product when it is used. The selection of the test spot is optional and each spot should be impact 3 times. If it is broken after impacting, stretch your finger into the gape. It is qualified if the exposed electrified body is untouchable.

Fifth, Temperature Impact Test

To assemble the related components into the sample first, then put the sample into an oven and heat it continuously for 2 hours at a constant temperature of180?. Take the sample out and put it into cold water of5?till it cools off to room temperature. After that, put it into the refrigerator for 2 hours at a constant temperature of-5?. All the above procedures are regarded as a cycle. After 5 cycles, take out the sample and make it cooling down to the room temperature. Contrast the related size of the sample before and after the test and the shrink of the related size should be less than 0.3 percent. There should be no cracks, breaks or other abnormal conditions on the sample after the test.

Sixth, Water Resistance Test

Method one, put the sample into the water of40?for 30 days.

Method two, put the sample into the water of40?±5?for 15-20 minutes, then take it out and dry it. Seal it in a transparent plastic bag and make sure it is exposed to light. Put it at room temperature for a week.

Determination: It is qualified if there has been no bubble, wrinkle or peeling off on the coating surface.

Seventh, Ethanol Tolerance Test

First, clean the printed surface to be tested with a piece of cotton cloth. Then pack the bottom of the jig of 1.5KGF with white cotton cloth and dip it into the 95 percent ethanol. Move it back and forth on the printed pattern and words 30 times. (For about 15 seconds)

Determination: Examine the condition of the surface of the printed products. The printing ink should have no jagging, line breaking, chipping off, serious adverse adherence, etc. It is acceptable if the color is slightly lighter. But the printed pattern and words should be clear and undimmed, or it is not qualified.

Eighth, Solvent Resistance Test

To pack the bottom of the jig of 1.5KGF with white cotton cloth and dip it into the banana oil or washout agent, and then move it back and forth on the printed pattern and words 30 times. (For about 15 seconds) 

Ninth, Constant Temperature and Humidity Test

To put the coating sample into the climatic chamber, 60±3?&93%&48H.

Determination: It is qualified if there has been no bubble, wrinkle or peeling off on the coating surface.

Tenth, Salinification Test  

A)     Immersion

Immerse the product into 3% NACL solution for 24 hours. If the component is not often in contact with water, use the solution of 3%; if it is often in contact with water, use the solution of 5%. The temperature of the water should be 35±2?, and the pressure should be 0.7~1.8KGF/CM2

B)     Boiling

Put the product into 3% NACL solution and switch the power on till the water dries out. Then, pour an appropriate amount of solution again. When the water dries out, pour some solution a third time and heat it till steaming appears. Cut off the power as soon as the steaming appears and lay it aside for 24 hours. Pour the remaining solution away and dry the water stains. Conduct cross- cutting test and nail scratching test. 

C)      Salt Spray

Put the product into the salt spray test machine for 24 hours, then conduct cross- cutting test and nail scratching test.

The test should be conducted at normal temperature.

Determination: The product should not be oxidized and there should be no peeling off, wrinkle or bubble on the coating surface.

11th, Baking Test

To assemble the related components into the sample first, then put the sample into the oven and heat it continuously for 4 hours at a constant temperature of180?. Take out the sample and make it cooling down to the room temperature. To contrast the related size of the sample before and after the test and the shrink of the related size should be less than 0.3 percent. There should be no cracks, breaks or other abnormal conditions on the sample after the test.

Determination: There should be no cracks or breaks on the coating surface.

12th, Long-term life span test

After the complete machine of the sample passes the reliability test, conduct a long-term life span test. The test should be done on the basis of procedures guide books on related machine types. Within 75% of the test cycles, there should be no abnormal conditions such as scorching. After a 100% test cycles, the completion of long-term lifetime test, there should be no abnormal conditions such as peeling off or bubbling on the coating surface.