Leneta 2A sealed Opacity Chart
140X254mm, black and white in half, upper black and lower white; surface film laminating, no fluorescent whitening agent, anti-penetration, Color uniform; 250 sheets per box; in line with D4941 standard.
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RDS 3 #1/4 "inks scraper rod film thickness 6.9μm rod diameter 6.35mm
499.0 RMB -
Japan OSP-60/60 Coating bar wet film thickness 60μm length 60mm
288.0 RMB -
MODERNER SZQ-600 (ISO Bird-type) Stainless Steel Film Applicator Film Thickness 600 μm
720.0 RMB -
Pushen SZQ-37.5 Coating hiding power coating applicator 37.5μm
480.0 RMB
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Leneta 2A hiding power test cardboard is the most popular model of Leneta hiding power cardboard in the United States. Leneta 2A varnish opacity cardboard is top black and bottom white varnish opacity cardboard, the size is 140 x 254mm . According to the big data of purchasing users in NBCHAO Mall, the industries used for 2A varnish covering power test cardboard include paint, plastic rubber, paint, pigment, hardware, instrumentation, printing, packaging, varnish, biomedicine and other industries.
Seven advantages of leneta covering power jam
Specifications
model | Specifications (mm) | color | Quantity per box (pieces) | standard | material | application |
Form 2A | 140 x 254 (5-1/2 x 10 inches) | Black and half, top black and bottom white | 250 | D4941 | Varnish | paint/ink |
Form 2C | 194 x 260 (7-5/8 x 10-1/4 inches) | Black and half, top black and bottom white | 250 | ASTM | ||
Form 2DX | 98x152 (3-7/8 x 6 inches) | Black and half, top black and bottom white | 500 | ASTM |
The choice of hiding power jam is related to the coating process
Different paint formulations. Test cardboards are required to have different solvent resistance, stronger or weaker. Different types of resins need to use poor solvents. The polarity of the solvent determines that its organic components can be activated more or less. To address this issue, two types of test jams are provided
Solve the problem of poor paint hiding power
The color of the underlying surface can be seen through the paint film, and this poor paint coverage often occurs in difficult-to-paint areas such as underbody panels or sharp corners.
1. Reasons for poor hiding power of paint
The thickness of the paint layer is not enough, and the paint hiding power is poor. The reasons are:
a) Improper spraying method.
b) The lighting conditions are poor, the working space is narrow, and it is difficult to access the spraying surface.
c) Inhomogeneous paint mixing.
d) Due to excessive grinding and polishing, the thickness of the paint layer is reduced.
2. How to prevent poor covering power of paints and other coatings
a) Use the correct spraying method to ensure that the paint film has an appropriate thickness and is even and smooth.
b) The space of the spray booth should be suitable, the lighting conditions should be good, and special attention should be paid to the spray quality of inaccessible areas when spraying.
c) To effectively mix the paint evenly.
d) Excessive polishing of the paint film is prohibited. Pay special attention to the corner areas.
3. Repair method of paint hiding power
Sand down defective areas and repaint.
Hiding Power Measurement
The basic considerations in the sales of architectural coatings are hiding power and output. The measurement of coating hiding power is how many coats need to be applied for a complete coating film? how many buckets of paint are needed
Hiding power is a measure of hiding power.
Hiding power, also known as hiding rate (%) = Y black/Y white*100 (%)
A coverage rate of 100% is complete coverage, that is, there is no difference between the black and white areas after coating.
Steps for usage
1. Apply paint and other coatings evenly on the paint hiding power test paper according to the film coating steps.
2. After the coating film is fully dried by air, use an instrument for objective evaluation.
3. The hiding power value can be measured within 1 second and displayed automatically.
The paint hiding power test paper is not limited to the measurement of the hiding power of paints and other coatings, and the corresponding hiding power test method can also be applied to the hiding rate detection of transparent films and plastic products.
Main types of LENETA cardboard
Opacity test piece: Use large black and large white to test the hiding power of the coating
Penopac Test Sheet: Penetration and Opacity Testing in One Sheet
Display sheet: Utilizes a twill pattern to aid in displaying the hiding power of the coating
Opacity Indicator: Combination of large black, large white and twill patterns
Spread rate test chip: Larger than other cards, used to measure the spread rate of coatings
Show pictures
Covering power jam-related configuration [need to be purchased separately]
Coating stick
Applicator sticks provide an economical and convenient method of producing coatings of uniform film thickness
Simple to use and easy to clean
Holds jammed paper securely while coating
Helps achieve even results
Leveling Sag Test
Leneta leveling test (see ASTM D 4062)
A. Equipment
1. Leneta leveling device, product number LTB-2;
2. Coating leveling standard, product number LS-2;
3. Leveling test coated plate, product number DP-2;
4. Scratch paper Form WB, used for light color paint; Form 7B scratch paper for dark paint;
5. Pad paper, Form CP-2
6. Pre-cutting equipment, see page 36 of the product catalog;
B. Preparation of paint
1. Stir thoroughly and adjust the temperature to 23°C (73°F);
2. Filter and adjust the viscosity if necessary;
3. Use one of the methods described in the attached Pre-Shear Method to pre-shear and then test immediately.
c. to paint
1. Place the pad paper on the coated board.
2. Place the scratch paper against the left leading edge of the coating plate.
3. The leveler is placed at the top of the jam, with its long arm close to the left leading edge and facing the operator.
4.取8-10毫升预剪切好的涂料置于流平器前端,以大约60厘米/秒(2英尺/秒)的速度进行快速均匀涂布。
5.在23°C (73°F)下,保持水平至干燥。
D.评级
1.干燥后,裁剪出一块3x5英寸(75 x 125毫米)大小的卡纸,条纹与长边平行。
2.在适合的斜光下将之与Leneta涂布流平度标准板对比。
3.匹配的标准编号就是Leneta的涂布流平值。评级的高级别是10,最低级别是0。
E. 评级值的实际意义
这是基于主观的判断。下表结论源自于一个经验丰富的实验室集体的共识:
Leneta 流平测试 (参见 ASTM D 4062)
Leneta 防流挂器测试方法(参见 ASTM D4400)
A. 仪器
1.防流挂器 2.可调直边器,产品编号SE-1 3.涂布用标准板,产品编号DP-1 4.涂布用刮样纸Form 7B,用于浅色涂料。白色刮样纸Form WB用于深颜色涂料。 5.垫纸,产品编号CP-1 6.用底量程防流挂器对器材进行预剪切,平板玻璃表面更好。
B. 涂料的预备
1.均匀搅拌,温度调整至23°C (73.5°F) 2.使用预剪切方法(the attached Pre-Shear Method)描述中的一种来进行预剪切,之后需要马上进行测试。
C. 涂漆
1.将直边器放置于涂布用标准板的适当位置。 2.在涂布板上放置测试刮样纸并夹住。 3.把流挂器放在刮样纸上靠近夹子的地方,流挂器开面朝操作者且其双肩紧靠直边器。放置垫纸。 4.在刀刃前放置适量(8-10毫升)的预剪切好的油漆,然后匀速以大约6英寸/秒(150毫米/秒)的速度进行涂布。 5.稳定快速的将它垂直放置,让条纹像立起的梯子一样水平,左边(最薄的条纹)在上面,并让它在保持这个状态下干燥。
D. 涂布评级
1.将涂布的条纹与防流挂器上的凹槽一一对应起来。 2.忽略前部和拖尾部份的边缘,只要观察条纹中央150毫米(5-1/2英寸)处即可,相当于Form 7B的黑色区域。 3.没有接触到下面条纹的那条最低(最厚)的那条条纹即作为标志条纹,而它对应的凹槽数就是油漆的防流挂指数。 4.要得到更精准的防流挂指数,需要在把凹槽数加上间隙间增量和非融入系数值(它融入下面条纹的系数)。
非融入系数可根据下表估计:
融入程度 | 非融入系数 |
完全 | 0 |
接近一般 | 0.25 |
少于一般 | 0.50 |
超过一般 | 0.75 |
E. 评级说明
这是以经验或试验为依据的并且有很强的主观性。需要强调的是,抗流挂指数不是湿膜厚度值。它是以mils表示的指示凹槽的间隙,因此,指示条纹大约是湿膜厚度的两倍。抗流挂指数及其相应大约的湿膜厚度都不应被理解为实践中的特定厚度。它是一个比较工具,只有基于实践经验它才能获取实际成果。一旦涂料在实际使用中体现了良好的抗流挂性,流挂指数即可被测量出并因此实现对具体配方流挂值的控制。
不同的产品之间的抗流挂指数可能不相同。譬如,乳胶漆通常比溶剂型涂料具有更高的指数值。下面关于流挂性能的判断是基于对一系列通用高光醇酸树脂色漆的观察而来的,且仅供参考之用。请勿将之作为最终结论。
抗流挂指数 | 抗流挂性 |
3 | Very Poor(非常差) |
The above indices cover the range of standard sag preventers, but many coatings require testing at lower or higher index values. This leads to three other anti-sag devices in the low, medium and high index ranges. In this way, the measurement value of the anti-sagging index is extended to 1-60.
LENETA Form 2A Opacity ChartSpecifications
LIST | VALUE |
---|---|
规格尺寸 | 140*254mm |
Color style | Black and white in half, top black and bottom white |
type | Sealed |
Encasement Specifications | 250 sheets |
Application standard | D4941 |
Application field | Paints/inks |
Weight | 2.72kg |
LENETA Form 2A Opacity Chart Packing list
Encasement x1, Opacity Chart x1
[Note] Because the manufacturer's packaging may be updated or upgraded, the detailed packaging list shall be subject to the latest standard configuration of the manufacturer.
LENETA Form 2A Opacity Chart Comment
FAQ
- ActiveGB/T 1727-2021
- ActiveGB/T 17001.6-2022
- ActiveGB/T 23997-2009
- ActiveHG/T 5776-2020
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- ActiveASTM D5150-2017
- ActiveASTM D6441-05-2024
- AbolishGB/T 13217.1-2009
- ActiveGB/T 13217.5-2008
- AbolishGB/T 13217.6-2008
- ActiveGB/T 13217.5-2008
- ReplacedJG/T 172-2005
- ActiveASTM D5150-92-2017
- ASTM D 344-97-2004
- ActiveASTM D6762-2018
- ActiveGB/T 9268-2008
- ActiveHG/T 2244-1991
- ActiveHG/T 3851-2006