1: Is there a unified standard for the color of color-coated rolls? How do I describe or specify exactly the color I want?
Answer: Yes, there are several sets of common color card standards in the industry that can help you communicate accurately. To say "red" directly is too vague, and the "red" of different manufacturers may vary greatly. The most commonly used ones are these:
RAL color card: internationally accepted, rich in colors, composed of "RAL" plus four digits. The first number represents the color system, for example, RAL 5xxx represents blue, RAL 3xxx represents red, which is easy to identify.
GSB National Standard Color Card: This is the "Paint Film Color Standard Sample Card", which contains 83 standard colors and is widely used in domestic construction projects, especially in power plants, steel plants and other fields.
CBCC China Architectural Color Card: This is the authoritative national color standard dedicated to the construction industry.
Enterprise customized color cards: Many large color coating manufacturers (such as Baosteel) also have their own color systems and color cards, which can correspond to the above-mentioned international standards.
2: Will color affect the durability of color-coated boards? Which is more durable, light or dark?
Answer: Yes, light colors are usually more durable and have a longer service life than dark colors. This is mainly due to two points:
Better reflection ability and lower operating temperature: light colors can reflect most of the sunlight. For example, the reflectivity of white painted panels to sunlight is about 85%, while black is only about 3%. According to experiments, in summer, the white surface is 10°C lower than the blue surface and 19°C lower than the black surface. Lower temperatures significantly slow down the aging of the coating.
Use more aging-resistant pigments: Light-colored paints mostly use inorganic pigments (such as titanium dioxide), which are inherently strong in UV resistance. Bright, dark colors mostly use organic pigments, which are more likely to be decomposed by ultraviolet rays and fade.
3.I heard that dark paint fades easily. Is this true? Is there any specific data comparison?
Answer: Yes, dark paint does fade more easily than light paint, especially in outdoor environments with strong UV rays. This is mainly because dark pigments are more sensitive to UV rays. A set of 8-year test data in Hainan exposure field illustrates the problem very intuitively:
Color Color difference (ΔE) after 8 years Fade resistance ranking
White 1.49 Excellent
Red 1.34 Excellent
Light yellow 1.26 Excellent
Green 3.43 Poor
4.Does color selection have an impact on building function? Like insulation or aesthetics?
Answer: The impact is very large, especially in terms of thermal insulation, energy saving and long-term aesthetics:
Thermal insulation and energy saving: Choose light colors when pursuing "coolness": Light-colored panels can effectively reflect solar radiation, reduce building surface temperature and internal heat gain, and are very suitable for roof and wall panels in hot areas. Dark-colored panels will absorb a lot of heat and increase the building's air conditioning load.
Maintain beauty: Choose light colors in pursuit of "long-lastingness": In addition to the problem of fading, even if the color of light-colored paint changes, the color difference from the original is relatively small and difficult to detect, and can maintain the unity and tidiness of the building's appearance for a longer period of time.
Of course, color selection will also be subject to architectural style, environmental integration and even corporate VI requirements. It is recommended to use functionality as the basis and then design aesthetically in a durable color range.
5.How should I choose colors scientifically based on budget and project needs?
Answer: Scientific color selection is to find a balance between budget, performance and aesthetics. It is recommended that you follow these steps:
Identify core needs: Consider the climate of the building's location, expected age, and whether it will be for roofs or walls.
Functionality first: In projects where performance is priority (such as factories in hot areas), light colors are preferred. If you choose a dark color for style reasons, it is best to match it with a higher weather-resistant coating (such as PVDF fluorocarbon coating) to make up for its short lifespan.
Unified supply batch: This is the most critical step. It is strongly recommended to purchase the same project and the same color from the same supplier in sufficient quantities at one time. Different batches of products, even if they use the same color card, may have color differences due to fluctuations in paint sources or processes, especially after long-term sun exposure.