The eye of the lacquer panel is not correct and is too obvious:
What are the performances?
The color of the nail hole is heavy or shallow, the position of the collision angle, and the color of the seam position is too heavy or uneven.
the reason:
There are tree lines on the panel, because the color of the tree lines is different, so when adjusting nails, several colors should be adjusted.
The panels, lines, and nails have different shades of darkness after painting. The color of the nails was almost finished, but when they finally survived, the colors were different.
Make up measures:
Dig up the nail hole and refill the nail hole. Grind and paint again.
In general: After the nails are painted, the color will increase. After the panel has been brushed and closed with a primer, the color has become heavy and the magnitude of the change is not significant. So when nailing eyes, nail holes should be slightly lighter. After painting, the color is the same.
The paint film has pores and bubbles:
the reason:
Paint viscosity is too high.
One spray is too thick.
Temperature is too high.
Curing agent, diluent ratio does not meet the requirements.
The table is too fast. Prevention:
Appropriate paint deployment, a spray paint can not be too thick.
Make up measures:
Polish and repaint.
Color difference problem of rubbing paint::
Black corners: The more paint is sprayed, the heavier the color. The position of the inside corner must be sprayed twice. When this side is sprayed, either the other side is blocked or the side is sprayed thin. When the other side is sprayed, this side is also sprayed, and the color is basically the same.
There is a color difference on the large surface: There are overlapping parts of the painting, and the overlapping part is too much, resulting in a color difference along the large surface.
Contrast of multiple color blocks on the large surface, there is chromatic aberration: The worker did not control the number of times of painting, and although this plate has no color difference, compared with another large surface, there is a color difference. Therefore, after painting, comparisons were made with multiple locations and it was found that the color difference was corrected in time.
The color difference between the line and the panel: The color of the line and the panel itself is definitely different. At the same time, the colors may be different.
Solution:
Can be considered to do bottom erase color, generally after the bottom of the color can be corrected by the color of the line and the panel.
The last reason:
Line tree branches, nail holes, planing marks.
So when it comes to carpentry, pick lines. After the bottom of the color can be seen almost.
The paint film has orange peel and fog:
Places that are prone to defects: The facade is prone to orange peel, the yin and yang corners are prone to fogging, and small spaces like museum shelves are prone to fogging.
Orange peel: After the paint was sprayed on the wood, it was not leveled in time and a layer of paint film resembling orange peel was formed.
The paint is too thick.
Gun pressure is too high or too close to the plate.
The ambient temperature is too high. Fogging: In the process of painting, after spraying one side, most of the paint will automatically level out. When the other side is sprayed, if the control is not good, this paint will pass through the air mist to the other side. In this way, the paint will be very rough. Not smooth.
Solution: Configure the paint in strict accordance with the instructions. Adjust the spray gun pressure, the spray gun is about 20cm from the plate.
Why does the paint fall?
Falling causes:
Too much thinner.
One spray is too thick.
Spray gun pressure is not uniform. Precautions:
The three-component paint preparation is modulated according to the paint instructions.
Spray evenly and thickness properly. Remedy:
Water sandpaper polished and repainted.
Paint spots, impurities:
the reason:
Excessive dust in the air, dust falls on the undried paint surface, it forms pits, pollutants.
Something like a door can be sprayed vertically. The fall of the facade is relatively small, and the plane falls more seriously.
When the paint is sprayed, the dust on the ground is made up by the pressure of the spray rush, and then it falls to the unpainted paint surface.
Solution:
Before painting, thoroughly clean the site. And can not cross construction of multiple types of work.
Before painting, sprinkle some water on the ground. Especially near the spray paint location.
For paint impurities, sand and paint.
The paint is shiny, originally matt paint, and the result is made like a light paint:
the reason:
1, curing agent and more.
2, the paint is not fully stirred before deployment.
3, the use of supporting curing agent.
Measures:
The ratio of the main paint and curing agent has been set at the factory, and only a moderate proportion of the two can achieve good results. Therefore, it is not possible to simply match according to their own construction experience, but to carefully explain the brand's coating.
The main paint and curing agent must be used together.
The reason for the poor transparency of the paint film:
The temperature on the construction site is too high and the humidity is too high, causing the paint film to blew.
The proportion of curing agent is unreasonable or not compatible with the main paint, and the miscibility with the main paint is poor.
The transparency of the paint itself is poor.
One coat is too thick.
The grass roots are uneven, and there are too many paints in low-lying areas.
solution:
Excessive temperatures and excessive humidity prohibit construction. The best is: temperature: 25 degrees, humidity: ≤ 75%.
The paint was formulated in strict accordance with the paint instructions.
Before the construction, inspect the carpenter. The large area of ​​the carpenter's plane must be flat.
Paint cracks, or large area fall off analysis:
Subtle cracks:
Cracks in the joints of plates or lines: For example, cracks often occur at the position of the corner line, the seam between the line and the panel.
the reason:
There is a problem with the construction of the carpentry (for example, too much glue or no glue is applied when installing the lines); problems with the plates and lines (for example: the lines are too wet and the deformation leads to cracks); the construction of the painter (the joints are not guarded Cracking or improper handling).
Cracks occur on the large surface of the sheet.
Plate problems (for example: quality plywood); painter construction problems (too many curing agent ratios, excessive surface drying).
Large area shedding:
The reasons for large areas of shedding are certainly related to the grassroots.
The paint scratches the base (for example: lacquer on polyester paint).
Either the grass is peeled off (the putty on the base board is thick, the thickness of the batch is not combined, and the putty does not combine with the board, causing shedding).
Panels, line seams at the paint surface subsidence:
position:
The position of the door cover line is the angle, the position of the door line and the panel, and the joint between the panel and the panel.
the reason:
Cracks are handled improperly against cracks, and the atomic ash is only filled once. When the atomic ash sinks, the paint finishes.
The correct way:
The putty should be solid, and it must be filled twice or more. Because the putty is easily sagged. Before the last time you paint, check the seams again. Found that there is a settlement in time to resolve.
Make up measures:
Varnish: make up transparent putty, sanding, paint.
Contaminated oil: Fill with putty or transparent putty, sanding, and spray paint.
Scratches, dirt, bumps on the paint surface:
Scratch, sandpaper printing:
Before the varnish panel is painted, it is scratched, but no brush is used to seal the primer. It cannot be seen. After installation, it was discovered after painting.
The sandpaper used to grind the primer is too coarse, causing the sandpaper to be too pronounced and the topcoat cannot cover.
The paint was not protected, and the putty of the batch of walls was approved. The workers polished or scratched the paint with hard objects.
When the painter repairs defects such as pitting on the paint surface, it is only polished, unpainted, or painted too thin. dirt:
The varnish panel was not closed before construction, and dirt was not found or was contaminated after installation.
During the construction process, other colors (such as other colors) were not treated in time. Bruising:
Especially when the panel touches the corner. Locations where people often pass by should install lines without using touch angles.
After the paint has survived, it should be protected in time. solution:
There is a scratch on the paint surface, which should be filled with transparent putty, sanded, and painted.
After the varnish panel enters the site, a closed primer should be applied first, and the problem plate should be found and not used.
Bumps should be properly repaired according to the extent of the bump.
Painters often forget to paint:
Door line mouth (connection with the wall). In particular, the double-storey building, down from the stairs, it is easy to see the gap between the top of the door line and the wall or see the top of the door line is not painted. This is hard to read.
Up and down the door: When the general worker paints the door, he paints the door and paints it (prevents falling ash). At this time, the next mouth is not easy to paint. Many workers will simply be lazy and do not spray, and they cannot see it anyway. However, if it is the door of the bathroom, if the upper and lower mouths are not painted, the moisture can easily penetrate into the door and deform the door.
Door inside: wardrobes, shoe cabinets, etc. should be painted on the inside and outside of the door. If the paint is made on one side, the forces on both sides of the door will not be uniform, resulting in deformation of the door.
Underneath the partition: The partition is made of a wall. The height of the partition is not high, and the bottom is generally not visible. Or the partition is relatively high, generally not seen above the partition. If a worker wants to be lazy, he will not paint, or simply do something to persuade the owners.
The underside of some desks is vacant, and the bottom is generally not painted, which makes it more ugly. It's best to paint again, which is beautiful and easy to clean.
One or six months after the paint surface yellowing:
First of all, many white things exposed in the air have a yellowing, aging chemical reaction. For example: home air conditioners, home appliances (PVC), furniture (paint), newspapers, books (paper), etc., for a long time, it will look old, yellowing. However, some paints are very white when they finish paint, but become yellowish in less than a year. why? Because: Most households use polyester paint as the paint. Polyester paints mostly contain free TDI. These free TDIs are not only harmful to people's health, but also yellow on the paint surface. , It can also yellow the wall paint around the paint. Polyester paint curing agent: Polyester paint curing agent is now mostly TDI, which is a class of compounds that are extremely harmful to the human body, because it is very volatile, usually TDI and TMP (hill hydroxymethyl propane) The reaction is an adduct used as a commercial curing agent. Therefore, the content of free TDI in the adduct (ie, TDI not reacted with TMP) determines the size of the curing agent. The safety margin for free TDI content is 0.5%.
Program:
Select those yellow grease-resistant polyester paints.
Choosing lacquer is also a good choice. Because the lacquer is a two-component paint (base paint + thinner), it contains no curing agent.
Painters' contamination of other finished products:
Hardware pollution. Including room door hinges, drawer slides, spring hinges and so on. In particular, the hinge of the room door was sprayed with paint and it was not easy to clean it. In fact, it is very simple. Before painting, remove all the hardware and mark it. Spray it and put it on again.
Glass, wall pollution. The glass is sprayed with paint for better handling. However, if the frosted glass is sprayed with paint, it is not easy to handle. Do paint first and then do latex paint. When spraying paint, if the wall is not protected, spray it on the wall, and then putty will make emptying easier. Correct practice: Protect the walls and glass with newspapers and color paper. Spray paint again.
Floor tiles pollution. Most floor tiles are not easily contaminated, so most are not protected. However, it is necessary to protect the vicinity of the air compressor because some air compressors are prone to oil leakage and can easily contaminate the floor tiles. There is also a case in which the putty drum is rusty and the floor tiles are soiled. This rust is not easily removed.
What are the performances?
The color of the nail hole is heavy or shallow, the position of the collision angle, and the color of the seam position is too heavy or uneven.
the reason:
There are tree lines on the panel, because the color of the tree lines is different, so when adjusting nails, several colors should be adjusted.
The panels, lines, and nails have different shades of darkness after painting. The color of the nails was almost finished, but when they finally survived, the colors were different.
Make up measures:
Dig up the nail hole and refill the nail hole. Grind and paint again.
In general: After the nails are painted, the color will increase. After the panel has been brushed and closed with a primer, the color has become heavy and the magnitude of the change is not significant. So when nailing eyes, nail holes should be slightly lighter. After painting, the color is the same.
The paint film has pores and bubbles:
the reason:
Paint viscosity is too high.
One spray is too thick.
Temperature is too high.
Curing agent, diluent ratio does not meet the requirements.
The table is too fast. Prevention:
Appropriate paint deployment, a spray paint can not be too thick.
Make up measures:
Polish and repaint.
Color difference problem of rubbing paint::
Black corners: The more paint is sprayed, the heavier the color. The position of the inside corner must be sprayed twice. When this side is sprayed, either the other side is blocked or the side is sprayed thin. When the other side is sprayed, this side is also sprayed, and the color is basically the same.
There is a color difference on the large surface: There are overlapping parts of the painting, and the overlapping part is too much, resulting in a color difference along the large surface.
Contrast of multiple color blocks on the large surface, there is chromatic aberration: The worker did not control the number of times of painting, and although this plate has no color difference, compared with another large surface, there is a color difference. Therefore, after painting, comparisons were made with multiple locations and it was found that the color difference was corrected in time.
The color difference between the line and the panel: The color of the line and the panel itself is definitely different. At the same time, the colors may be different.
Solution:
Can be considered to do bottom erase color, generally after the bottom of the color can be corrected by the color of the line and the panel.
The last reason:
Line tree branches, nail holes, planing marks.
So when it comes to carpentry, pick lines. After the bottom of the color can be seen almost.
The paint film has orange peel and fog:
Places that are prone to defects: The facade is prone to orange peel, the yin and yang corners are prone to fogging, and small spaces like museum shelves are prone to fogging.
Orange peel: After the paint was sprayed on the wood, it was not leveled in time and a layer of paint film resembling orange peel was formed.
The paint is too thick.
Gun pressure is too high or too close to the plate.
The ambient temperature is too high. Fogging: In the process of painting, after spraying one side, most of the paint will automatically level out. When the other side is sprayed, if the control is not good, this paint will pass through the air mist to the other side. In this way, the paint will be very rough. Not smooth.
Solution: Configure the paint in strict accordance with the instructions. Adjust the spray gun pressure, the spray gun is about 20cm from the plate.
Why does the paint fall?
Falling causes:
Too much thinner.
One spray is too thick.
Spray gun pressure is not uniform. Precautions:
The three-component paint preparation is modulated according to the paint instructions.
Spray evenly and thickness properly. Remedy:
Water sandpaper polished and repainted.
Paint spots, impurities:
the reason:
Excessive dust in the air, dust falls on the undried paint surface, it forms pits, pollutants.
Something like a door can be sprayed vertically. The fall of the facade is relatively small, and the plane falls more seriously.
When the paint is sprayed, the dust on the ground is made up by the pressure of the spray rush, and then it falls to the unpainted paint surface.
Solution:
Before painting, thoroughly clean the site. And can not cross construction of multiple types of work.
Before painting, sprinkle some water on the ground. Especially near the spray paint location.
For paint impurities, sand and paint.
The paint is shiny, originally matt paint, and the result is made like a light paint:
the reason:
1, curing agent and more.
2, the paint is not fully stirred before deployment.
3, the use of supporting curing agent.
Measures:
The ratio of the main paint and curing agent has been set at the factory, and only a moderate proportion of the two can achieve good results. Therefore, it is not possible to simply match according to their own construction experience, but to carefully explain the brand's coating.
The main paint and curing agent must be used together.
The reason for the poor transparency of the paint film:
The temperature on the construction site is too high and the humidity is too high, causing the paint film to blew.
The proportion of curing agent is unreasonable or not compatible with the main paint, and the miscibility with the main paint is poor.
The transparency of the paint itself is poor.
One coat is too thick.
The grass roots are uneven, and there are too many paints in low-lying areas.
solution:
Excessive temperatures and excessive humidity prohibit construction. The best is: temperature: 25 degrees, humidity: ≤ 75%.
The paint was formulated in strict accordance with the paint instructions.
Before the construction, inspect the carpenter. The large area of ​​the carpenter's plane must be flat.
Paint cracks, or large area fall off analysis:
Subtle cracks:
Cracks in the joints of plates or lines: For example, cracks often occur at the position of the corner line, the seam between the line and the panel.
the reason:
There is a problem with the construction of the carpentry (for example, too much glue or no glue is applied when installing the lines); problems with the plates and lines (for example: the lines are too wet and the deformation leads to cracks); the construction of the painter (the joints are not guarded Cracking or improper handling).
Cracks occur on the large surface of the sheet.
Plate problems (for example: quality plywood); painter construction problems (too many curing agent ratios, excessive surface drying).
Large area shedding:
The reasons for large areas of shedding are certainly related to the grassroots.
The paint scratches the base (for example: lacquer on polyester paint).
Either the grass is peeled off (the putty on the base board is thick, the thickness of the batch is not combined, and the putty does not combine with the board, causing shedding).
Panels, line seams at the paint surface subsidence:
position:
The position of the door cover line is the angle, the position of the door line and the panel, and the joint between the panel and the panel.
the reason:
Cracks are handled improperly against cracks, and the atomic ash is only filled once. When the atomic ash sinks, the paint finishes.
The correct way:
The putty should be solid, and it must be filled twice or more. Because the putty is easily sagged. Before the last time you paint, check the seams again. Found that there is a settlement in time to resolve.
Make up measures:
Varnish: make up transparent putty, sanding, paint.
Contaminated oil: Fill with putty or transparent putty, sanding, and spray paint.
Scratches, dirt, bumps on the paint surface:
Scratch, sandpaper printing:
Before the varnish panel is painted, it is scratched, but no brush is used to seal the primer. It cannot be seen. After installation, it was discovered after painting.
The sandpaper used to grind the primer is too coarse, causing the sandpaper to be too pronounced and the topcoat cannot cover.
The paint was not protected, and the putty of the batch of walls was approved. The workers polished or scratched the paint with hard objects.
When the painter repairs defects such as pitting on the paint surface, it is only polished, unpainted, or painted too thin. dirt:
The varnish panel was not closed before construction, and dirt was not found or was contaminated after installation.
During the construction process, other colors (such as other colors) were not treated in time. Bruising:
Especially when the panel touches the corner. Locations where people often pass by should install lines without using touch angles.
After the paint has survived, it should be protected in time. solution:
There is a scratch on the paint surface, which should be filled with transparent putty, sanded, and painted.
After the varnish panel enters the site, a closed primer should be applied first, and the problem plate should be found and not used.
Bumps should be properly repaired according to the extent of the bump.
Painters often forget to paint:
Door line mouth (connection with the wall). In particular, the double-storey building, down from the stairs, it is easy to see the gap between the top of the door line and the wall or see the top of the door line is not painted. This is hard to read.
Up and down the door: When the general worker paints the door, he paints the door and paints it (prevents falling ash). At this time, the next mouth is not easy to paint. Many workers will simply be lazy and do not spray, and they cannot see it anyway. However, if it is the door of the bathroom, if the upper and lower mouths are not painted, the moisture can easily penetrate into the door and deform the door.
Door inside: wardrobes, shoe cabinets, etc. should be painted on the inside and outside of the door. If the paint is made on one side, the forces on both sides of the door will not be uniform, resulting in deformation of the door.
Underneath the partition: The partition is made of a wall. The height of the partition is not high, and the bottom is generally not visible. Or the partition is relatively high, generally not seen above the partition. If a worker wants to be lazy, he will not paint, or simply do something to persuade the owners.
The underside of some desks is vacant, and the bottom is generally not painted, which makes it more ugly. It's best to paint again, which is beautiful and easy to clean.
One or six months after the paint surface yellowing:
First of all, many white things exposed in the air have a yellowing, aging chemical reaction. For example: home air conditioners, home appliances (PVC), furniture (paint), newspapers, books (paper), etc., for a long time, it will look old, yellowing. However, some paints are very white when they finish paint, but become yellowish in less than a year. why? Because: Most households use polyester paint as the paint. Polyester paints mostly contain free TDI. These free TDIs are not only harmful to people's health, but also yellow on the paint surface. , It can also yellow the wall paint around the paint. Polyester paint curing agent: Polyester paint curing agent is now mostly TDI, which is a class of compounds that are extremely harmful to the human body, because it is very volatile, usually TDI and TMP (hill hydroxymethyl propane) The reaction is an adduct used as a commercial curing agent. Therefore, the content of free TDI in the adduct (ie, TDI not reacted with TMP) determines the size of the curing agent. The safety margin for free TDI content is 0.5%.
Program:
Select those yellow grease-resistant polyester paints.
Choosing lacquer is also a good choice. Because the lacquer is a two-component paint (base paint + thinner), it contains no curing agent.
Painters' contamination of other finished products:
Hardware pollution. Including room door hinges, drawer slides, spring hinges and so on. In particular, the hinge of the room door was sprayed with paint and it was not easy to clean it. In fact, it is very simple. Before painting, remove all the hardware and mark it. Spray it and put it on again.
Glass, wall pollution. The glass is sprayed with paint for better handling. However, if the frosted glass is sprayed with paint, it is not easy to handle. Do paint first and then do latex paint. When spraying paint, if the wall is not protected, spray it on the wall, and then putty will make emptying easier. Correct practice: Protect the walls and glass with newspapers and color paper. Spray paint again.
Floor tiles pollution. Most floor tiles are not easily contaminated, so most are not protected. However, it is necessary to protect the vicinity of the air compressor because some air compressors are prone to oil leakage and can easily contaminate the floor tiles. There is also a case in which the putty drum is rusty and the floor tiles are soiled. This rust is not easily removed.
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