In the process of toning latex paint, it is often encountered that the color is not bright enough, or the saturation is poor. There may be several reasons for this situation.
①The saturation of color paste is not enough.
②The color paste system used cannot cover the entire color space well, and the color paste far away from the color coordinate point is used to adjust the color. Even if the color can be adjusted to a similar color, the saturation will definitely be greatly reduced.
③ Too much color paste is used in the color formula, and even complementary colors are used in the same formula, which greatly reduces the saturation. Since color mixing is subtractive mixing, it will dull the color.
④ There are too many white pigments in the latex paint, or the hiding power is diluted because the PVC is too high.
To obtain bright colors, you need to pay attention to the following issues:
① The pigments used to make color pastes need to be bright. Since the structure, crystal form, and particle size of pigments all affect the vividness of colors, the pigments used to make color pastes must be strictly controlled.
②The color paste system used should be able to cover the entire color space well, and any color can be modulated by finding a color paste with a closer color space distance from the color paste system, so as to ensure less sacrifice of saturation Under the circumstances, the hue is consistent.
③ The types of colorants selected in the color formula should be as few as possible. As long as the used color paste system is appropriate, any color can be adjusted with up to 4 color pastes. Too many types of colorants are not only dull in color, but also uneconomical.
④The color of high saturation generally does not need white pigment, but can be prepared with varnish. If the base paint contains white pigments or there are too many white pigments, the saturation will definitely decrease, or a large amount of colorant needs to be added to achieve sufficient saturation, which will greatly increase the color matching cost, and may also affect other aspects of the paint. performance.
⑤ In the production of latex paint, the method of increasing PVC to produce "dry hiding power" is often used to reduce costs. When mixing highly saturated colors, this "dry hiding power" will dilute the color and reduce saturation like white paint. Therefore, the PVC of good latex paint should generally not be too high, such as not more than 45%.
