Coating standard: gb1758-79 determination of coating usage

Core tip: this standard is applicable to the determination of coating usage That is, the amount of paint required to make a certain thickness of paint film on the unit area of the base plate, expressed in g / m2 1、 General provisions 1 Paint brush of materials and instruments: 25-35mm wide; spray gun; tinplate: 50 × 120 × 0.2-0.3mm; balance: 0.1g, 0.01g 2、 Determination method 2 Method a: brush application method (1) the weight of the paint brush and the container containing the sample is weighed on the balance with a sensitivity of 0.1, and the weight of the paint brush and the container containing the sample is measured on the tinplate according to paint film I 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 Home of coatings: this standard is applicable to the determination of coating usage That is, the amount of paint required to make a certain thickness of paint film on the unit area of the base plate, expressed in g / m2 I General Provisions 1 Paint brush of materials and instruments: 25-35mm wide; spray gun; tinplate: 50 × 120 × 0.2-0.3mm; balance: 0.1g, 0.01g II Determination method 2 Method a: brush method (1) in the determination step, the weight of the paint brush and the container containing the sample is weighed on the balance with a sensitivity of 0.1, and the sample plate is prepared on the Makou iron plate by brush method in general preparation method of paint film (gb1727-79) Weigh the paint brush and the remaining sample container (2) calculation method: paint consumption g / m2 (x) is calculated according to the following formula: x = W1-W2 / s × 104, where: W1 - weight of paint brush before painting and container containing sample, G; W - weight of paint brush after painting and container containing remaining sample, G; s - painting area, cm2 3 Method B: spray method (1) determine the amount of paint used according to the dilution ratio A measure the weight of the tinplate on the balance with a sensitivity of 0.01g Prepare the diluted sample according to the spray method in general preparation of paint film (gb1727-79), and immediately weigh the sample weight b Calculation method: after dilution, the amount of paint used is g / m2 (x1) calculated according to the following formula: X1 = B-A / C × 104, where: a - weight of the front plate before painting, G; B - weight of the rear plate after painting, G; C - painting area, cm2 The amount of paint used before dilution g / m2 (x2) is calculated according to the following formula x2 = x1-x1 · Y / 100, where: X1 - the amount of paint used after dilution, g / m2; Y - the percentage of solvent added during dilution (2) Measure the amount of paint used according to the solid content a First, weigh the tinplate on a balance with a sensitivity of 0.01g Prepare the diluted sample by spraying according to the general preparation method of paint film (gb1727-79), dry it for 24 hours under the conditions specified in the product standard, and then weigh it b Calculation method: paint consumption g / m2 (x) is calculated according to the following formula: x = B-A / s · D × 100 × 104, where: a - weight of the front plate before painting, G; B - weight of the rear plate after painting, G; s - painting area, cm2; D - solid content of the sample,% Note: the measurement of the usage of the coating paint is to apply the Mongolian cloth on the frame for painting, and measure it according to the same method Note: since the implementation of this standard, the original standard hg2-1038-77 is invalid 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,