Waterborne Color Paste
1. Although it was accepted by most customers that Kaibao waterborne color paste has good compatibility with most available paints, it is still preferred to do compatibility test before use to make sure good mixture effect as rough turning and flocculation.
2. Stir thoroughly before use to avoid uneven color paste and accuracy of add volume each time caused by long storage or high temperature and other factors,
3. Kaibao waterborne color paste can be diluted with water and add paint into the paste under same stir speed, or add paste directly into paint during stirring. The act shall be slow and constant, otherwise flocculation may occur.
4. Conduct color mixing test before formulation, do not put all color paste at one time to avoid too much paste and waste.
5. After use, close the cover immediately for the left color paste to prevent pollution or surface crust caused by water evaporation and impact the next use.
Description of add volum
About the "recommend minimum add volume" of Kaibao waterborne color paste when do exterior wall painting is determined by the paint property of the paste and the actual work experiences. Not all the color (particularly light-color) can keep a good color during exterior wall coating. Users can do relative antiaging test, if it can not work, please refer to the recommend minimum add volume to ensure the color sustain of the wall.
Selection of color paste for exterior wall color
During design,generally select the color pastes with good resistance to light and weather. Inorganic color paste have better resistance to light and weather with low price but less brightness and can not make colors with high saturation. Organic color paste is very bright with strong tinting strength which have higher saturation with better resistance to light and weather no matter for dark or light color. A proper use of these two can lead to desired hue and saturation and ensure the color and weatherability with a economical cost.
PH value of wall material affect the color
1. The ideal pH value for stability of the waterborne color paste is 6.5-10.
2. Pay special attention to the alkalinity of the painting wall, Too strong alkalinity may cause discoloration and phenomenon of Alkaline appeared, biting color and gray wall.
3. Do Alkaline test for the painting wall if possible, wash the wall with 5-10% oxalic acid for high Alkalinity wall, make the pH<10.
4. The wall surface should be clean, dry, oil-free, no shelling and peeling, less than 10% moisture content, the ambient temperature of the site should above 8 ° C, the relative humidity is below 85%.
Proper latex paint formulation impact the weatherability of color paste
1. Many ingredients, eg. ingredient types and the ratio of Latex paint ; the type and amount of latex; the type and content of titanium dioxide and other additives together with many other factors will affect the weatherability and lightfastness of the latex paint .
2. It is possible to use slight oil-absorbing ingredients in stead of high Alkaline and powder ingredient
3. Increase the content of polymer and titanium oxide can improve color retention and covering power.
4. Put the same color paste into identical formulation, dark-color painting has better light and weather resistance compared to light-color.
5. For extreme dark-color exterior wall coating, properly reduce the content of light-color pastes and increase polymer content with less color paste proportion, but make sure the covering power.
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