Coating knowledge: how to solve the problem of color difference of powder coating?

Core tips: 1 To improve the control standard for those customers with high color difference requirements (such as Δ e ≤ 0.4) or products with slight color difference but significant visual change (such as light color with red or yellow), it is necessary to improve the quality control standard and strengthen visual inspection In general product enterprises, the control color difference Δ e ≤ 1, part Δ e ≤ 0.5, and most of them are single light source, which is easy to cause obvious visual color difference In order to strengthen the control, the color difference under various light sources must be consistent (as Δ e ≤ 0.5), and it must pass the inspection, proofreading and review Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Paint Home News: 1 To improve the control standard for those customers with high color difference requirements (such as Δ e ≤ 0.4) or products with slight color difference but significant visual change (such as light color with red or yellow), it is necessary to improve the quality control standard and strengthen visual inspection In general product enterprises, the control color difference Δ e ≤ 1, part Δ e ≤ 0.5, and most of them are single light source, which is easy to cause obvious visual color difference In order to strengthen the control, the color difference under various light sources must be consistent (as Δ e ≤ 0.5), and it must be consistent and qualified through the visual inspection of the inspection, proofreading and auditing personnel 2 Even the products of large-scale raw material manufacturers, especially the pigments, are generally subject to color difference between batches The color of some powder coating products is particularly sensitive to them, and the on-site color matching personnel try their best to ensure that the color is the same as before The raw material supplier suggests that the powder manufacturer increase the purchase quantity of a single batch to ensure the color consistency of multiple batches of products, which has certain improvement effect For some important customers and important control products, it is also necessary to take such measures 3 The customer order of product inventory coating is determined according to the processing batch of workpieces Many customers order less in a single batch, which brings difficulties to the production and quality control of powder coating For those customers who use the same product all the year round but can't order too much in a single batch, the powder coating manufacturer may as well, on the basis of full demonstration, produce in large quantities in less batches, do a good job in product inventory, and the coating customers also suggest and welcome this practice 4 To strengthen the technical service in case of color difference, the after-sales technical service shall be carried out generally, while the pre-sales technical service can well reduce the occurrence of color difference Slight color fluctuation is basically acceptable to customers, but continuous fluctuation or deviation expansion will cause strong complaints from customers Regular visit and advanced communication can quickly find problems and correct them in time For those products with too large color difference and rejected by customers, they should be replaced quickly; when the color of the coating and molding used by customers fluctuates, they should communicate with customers in time to avoid excessive deviation of customers according to the standard (many customers will take the coating and molding products to ask for the color of powder coating); Timely visit can also know customer information at any time, and actively adjust products to meet customer needs 5 The fundamental problem to solve the color difference lies in the complete variety of pigments However, the comprehensive establishment of pigment storehouse requires a lot of manpower, material and financial resources It is a long-term and continuous process, and it can not guarantee that it fully meets the business needs of the enterprise, and the enterprise can not bear the risk of storing the whole package of new pigments for several years for a small order There is a great contradiction between the unlimited number of pigments in color matching theory and the limited stock in practice The first method is to enrich the varieties of pigments, such as green pigments, yellow pigments, blue pigments, orange red pigments, purple red pigments, etc.; the second method is to have complete specifications, such as good quality, high price and high quality pigments, domestic and foreign pigments, lead-free pigments, etc.; the third method is to have special products, such as pigments needed by large sales, high profits or important customers, and actively select samples for standby; Fourth, technical reserve, sampling, storage or trial use of some special pigments (such as high price, excellent quality, special demand or new varieties) 6 conclusion Color matching and quality control is the most basic and important technical work in powder coating production At present, many enterprises are still using low efficiency pure manual operation, some of which have begun to use the help of color difference instrument The main powder coating manufacturers in China only master the color matching technology in the hands of a few key technicians, and the quality inspectors in the production line only use visual inspection to fine tune the product color However, with the continuous development of powder coating, many managers have gradually realized the high efficiency and quality assurance brought by colorimeter to the enterprise, and the use of colorimeter will be gradually popularized Only by fully combining the instrument matching technology with visual evaluation and practical experience, can technicians really do a good job in color measurement and control of powder coating products Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,