echemi logo
Product
  • Product
  • Supplier
  • Inquiry
    Home > Coatings News > Paints and Coatings Market > General knowledge of coating: precautions for construction and acceptance of oil cleaning and painting on wood surface

    General knowledge of coating: precautions for construction and acceptance of oil cleaning and painting on wood surface

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
    Search more information of high quality chemicals, good prices and reliable suppliers, visit www.echemi.com
    Key tips: 1 Contents of oil cleaning and painting Varnish painting is one of the basic methods of finishing doors and windows, dado, heating hood, supporting furniture, etc On the basis of changing the color of wood, oil painting can keep the original pattern of wood The decoration style is natural, simple and elegant Although the construction period is long, it is widely used 2 Procedures for oil cleaning and painting The clear oil painting on the surface of wood is a highly technical construction project The standard construction procedures are: cleaning the surface of wood → sanding paper polishing → moistening powder → sanding paper & rarr Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Paint Home News: 1 Oil painting is one of the basic methods of finishing doors and windows, dado, heating hood, supporting furniture, etc On the basis of changing the color of wood, oil painting can keep the original pattern of wood The decoration style is natural, simple and elegant Although the construction period is long, it is widely used 2 The procedure of varnish painting is a highly technical construction project The standard construction procedure is: clean the wood surface → polish the sanding paper → moisten the powder → polish the sandpaper → fully scrape the putty for the first time , sandpaper polishing → fully scraping the second time of putty, fine sandpaper polishing → painting the oil color → painting the first time of varnish → matching the color, re filling the putty, fine sandpaper polishing → painting the second time of varnish, fine sandpaper polishing → painting the third time of varnish, polishing → after the effect is satisfactory, the sandpaper will be polished to remove the light, wax and polish The quality of the wood surface oil cleaning construction is very different, which can reflect the professional and technical level of the operators It is necessary to operate in strict accordance with the standard procedures to ensure the decoration effect and project quality after painting 3 The base treatment and grinding before oil cleaning and painting is an important process of painting varnish First, the dust, oil and other impurities on the surface of wood should be removed, and the nail holes and nail caps should be sunk into the wood for 1mm as required The nail caps should be smashed and then trapped When sanding the sandpaper, wrap the sandpaper around the short wood square and pad it for grinding The line angle and large surface shall be ground and polished, and the surface shall be cleaned with damp cloth or cotton wire The upper lubricating oil powder is also an important process of varnish painting The oil powder is mixed with white powder 2 gasoline 2 light oil = l222821 (mass ratio) and added with color material The consistency is appropriate in the form of thin paste During the construction, apply the oil powder on the surface of the wood with cotton thread dipped in the oil powder, rub it back and forth with hand, and rub the oil powder into the inspection eye of the wood It is required that the exposed parts on the surface of the surgical instrument F should be wiped, and there should be no leakage, or the face will be painted after the varnish is applied After the oil powder is slightly dry, wipe the oil powder with hessian cloth or wood shavings, and scrape the line corner with scraper, without any residual block oil powder After the oil powder is dry, use No.1 sandpaper to polish it gently along the wood grain First, grind the line angle, then the plane, until the surface is smooth, but the oil powder at the edges and corners cannot be completely worn off If the mortar stubble is exposed, add the oil powder, dry it and then regrind it, and wipe it with damp cloth or cotton wire The putty is made by adding appropriate amount of water with gypsum powder 2 gloss = 2027 (volume ratio) The amount of pigment added shall be based on the principle of slightly lighter color than other parts Use a knife or scraper to scrape the putty into the nail hole, joint, etc when scraping, it shall be horizontally and vertically plastered, scraped and cleaned After drying, it shall be lightly polished with sandpaper along the wood grain, and cleaned with damp cloth or cotton thread 4 Construction specification for oil cleaning brush: when painting oil, the oil brush should be held in hand easily and naturally to facilitate flexible and convenient movement Generally, three fingers should be used to hold the handle of the brush, and the fingers should be slightly forced to move without loosening or dropping the brush The painting shall be carried out in accordance with the requirements of more secondary dips, less oil dips each time, and frequent brushing during operation, in accordance with the sequence of first up and then down, first difficult and then easy, first left and then right, first inside and then outside, and the operation method of horizontal and vertical brushing When the first coat of varnish is applied, a certain amount of thinners shall be added to dilute the paint so as to facilitate the quick drying of the paint film During the operation, brush along the operation pattern, evenly rotate vertically, and then straighten along the direction of the wood pattern It is required to brush the paint film evenly, without leakage or falling After the clear oil is completely dry and hardened, polish it with sandpaper When polishing, it is required to polish all the brightness on the paint film to increase the bonding degree with the subsequent coating After grinding, wipe it with damp cloth or cotton thread After the first coat of varnish is applied, the finish shall be cleaned and repaired If there is obvious unevenness on the paint surface, it can be repaired with oil putty with the same color as the paint surface If the knots and black spots on the surface of wood 1 are inconsistent with the large paint surface, the oil color of the required color shall be prepared and covered to ensure that there is no big color difference in the finish When brushing the second coat of varnish, do not add any diluent When brushing, brush it fully The paint film can be slightly thicker When operating, brush it several times in the horizontal and vertical directions to make it bright and even If there is a phenomenon of falling in the day, use the brush to fly in the direction of the original brush pattern immediately after the first coat is dry, and then polish and wipe it according to the treatment method of the first coat Apply a third coat of varnish Surface polishing and waxing is a further decoration of the surface, and it is also an important difference between high-grade paint engineering and general paint engineering When polishing, first dip the abrasive paper in soapy water for grinding, start with 320 water abrasive paper, and finally use 600 water abrasive paper When grinding, the force shall be even and the whole paint film shall be ground Then dip the sand wax (polishing paste) on the soft cloth and rub it repeatedly on the surface of the paint film Soft cloth should not be too much wax liquid, rubbing action to be fast When the surface is very smooth and flat, polish the wax, dip cotton in the wax, and wipe a thin layer on the surface of the paint film 5 The environment of varnish painting requires that when the wood surface is painted with varnish, the environment is required to be high When the environment cannot meet the required standard, the quality of the project will be affected The painting site shall be clean and dust-free Before painting, it shall be thoroughly cleaned During painting, air circulation shall be strengthened During operation, the ground shall be sprinkled with clean water frequently, and cross operation with dust producing work is not allowed Therefore, the application of varnish should be carried out in the final stage of home decoration works The painting shall be carried out in a slightly dry climate, and the temperature must be above 5 ° C before construction, so as to ensure the normal dry fixation of the paint film, shorten the construction period and improve the quality of the paint film The construction site for painting and cleaning shall have good lighting conditions to ensure accurate color matching, no missing painting during construction, and timely detect the change of paint film, so as to take solutions Therefore, in a darker environment, the lighting on the working surface should be added 6 The color of oil cleaning brush and the type of cleaning and berthing used shall meet the design requirements The painting surface shall be free of quality defects such as missing brush, peeling, spot, edge wrapping, sagging and wrinkle The wood grain shall be clear, the brown eye shall be scratched flat, the color shall be the same, and there shall be no brush grain The surface of the hand touch inspection surface shall be smooth and flat, without blocking hand feeling, the paint film shall be bright and soft, and the hardware adjacent to the wood ware shall be smooth The glass, wall and ground shall be clean without mooring mark 7 The common quality problems and treatment methods of oil cleaning brush are affected by many factors The common quality defects are sagging, brush lines, wrinkles, pinholes, loss of light, rough film, etc (1) The main reason of sagging 2 is that the viscosity of the paint is too low, the oil brush is dipped too much or the nozzle diameter is too large, or the diluent is not selected properly In the construction, the viscosity of the coating should be reasonable, and the thickness of each brush should be controlled When the oil brush is dipped in oil, it shall be dipped frequently, less and more smoothly each time, especially at the groove and the fine modeling part, it shall be brushed flat in time, and attention shall be paid to the ventilation at the construction site When repairing, wait for the paint film to dry out, polish the paint film with fine sandpaper, and then brush the top coat again (2) Brush pattern: the main reason is that the viscosity of the paint is too large, the paint is not brushed along the direction of the wood pattern, the oil brush is too small, the bristles are too hard and the bristles are uneven The diluent and brush with good quality shall be selected during the construction, and the viscosity of the coating shall be adjusted appropriately When repairing, polish the paint surface gently with sandpaper to make the paint surface flat, and then brush the top coat again (3) Wrinkle: it is mainly due to the dry shrinkage of the surface layer while the inner layer is not dry when the paint film is exposed to high temperature or sunlight, or the paint film is too thick Operation under high temperature and sunlight shall be avoided during construction Diluent can be added properly according to the temperature change, and the paint shall be brushed thinly every time After wrinkles appear, the paint film shall be sanded and repainted after drying out (4) Pinhole: the main reason is that the paint viscosity is large, the construction site temperature is too low, the paint has bubbles, and there are impurities in the paint Suitable varnish shall be purchased according to climatic conditions to avoid construction in low temperature and windy days The viscosity of varnish should not be too large, and it should be stopped for a period of time after mixing with diluent (5) Loss of light: the main reason is that the air humidity is too large in the construction time and space, smoke is encountered when the paint is not dry, and the treatment of oil pollution at the base is not thorough Rainy, cold and humid environment shall be avoided during construction No smoke and dust is allowed on site Oil contamination shall be completely removed during base treatment In case of loss of light, it can be irradiated by far infrared ray, or a thin layer of coating with moisture-proof agent is applied (6) Rough paint film: the main reason is poor paint quality, large dust in the construction environment, and unclean tools In addition to the construction in accordance with the specifications, the varnish with good quality shall be selected When repairing, sandpaper can be used to polish the paint film smooth, and then brush the surface varnish again 8 It is estimated that the time limit of oil removal painting is a decoration project that consumes man hours and requires high technical level The construction period varies according to the area, complexity, type and quality of varnish applied to the indoor surface Taking the family decoration of three rooms and two halls as an example, including doors and windows, heating hoods, wooden wainscots and furniture making, etc for the finishing varnish painting, it takes about 12 days for the common standard varnish painting, and about 14 days for the high-grade wood varnish painting, including the waiting time for the process If nitrocellulose varnish or alkyd varnish is used, due to the quick drying paint, the time interval of recoating is short, and the construction period can be shortened 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,
    This article is an English version of an article which is originally in the Chinese language on echemi.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to service@echemi.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

    Contact Us

    The source of this page with content of products and services is from Internet, which doesn't represent ECHEMI's opinion. If you have any queries, please write to service@echemi.com. It will be replied within 5 days.

    Moreover, if you find any instances of plagiarism from the page, please send email to service@echemi.com with relevant evidence.