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      Home> Paint Chart> LENETA> LENETA Form 3B Opacity Chart

      American Leneta 3B sealed Opacity Chart on white medium black under white

      American Leneta 3B sealed Opacity Chart specification size 194 * 289mm, Color style on white, medium black and white, type sealed, Encasement specification 250 sheets, suitable for contrast ratio determination of Coating, etc.

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      SKU: NB000757
      United States LENETA
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        • LENETA Form 3B Opacity ChartOverview

        • Specifications
        • Comments
        • FAQs
        Form 3B
        Opacity Chart

        Picture show

        LENETA Form 3B Opacity Chart LENETA Form 3B Opacity Chart
        Form 3B
        Opacity Chart
        LENETA Form 3B Opacity Chart Figure 1
        LENETALOGO

        American Leneta 3B/7B Varnish Hiding Power Paper in color shape with upper part white, middle part black and lower part white, size 194 x 289 mm. Leneta 3B/7B varnish hiding power paper is suitable for the measurement of the contrast ratio of coatings and the proofing of coatings. Leneta 3B/7B varnish hiding power paper has varnish on the surface, which can prevent the paint from penetrating into the cardboard and affect the test results.

        Leneta Hiding Power Paper Brand Introduction

        Seven advantages of leneta covering power paper


        American Leneta 3B/7B varnish covering power paper advantage 1-smooth surface

        American Leneta 3B/7B varnish covering power paper advantage 2-not easy to curl

        American Leneta 3B/7B varnish covering power paper advantage 3-no fluorescent agent

        American Leneta 3B/7B varnish covering power paper advantage 4-adhesion

        American Leneta 3B/7B varnish covering power paper advantage 5- anti-penetration

        American Leneta 3B/7B varnish covering power paper advantage 6- wettability

        美国Leneta 3B/7B 罩光油遮盖力纸优势7-颜色均匀

        Specifications

        modelSpecifications (mm)colorQuantity per box (pieces)standardWeight (lbs)materialapplication
        Form 3B194 x 289 Top white, middle black, bottom white250
        9Varnishpaint ink
        Form 7B194x289 (3-7/8 x 6 inches)Top white, middle black, bottom white250ASTM

        The choice of hiding power jam is related to the coating process

        Different paint formulations. It is required that the test cardboard has different resistance to solvents , 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 (%)

        遮盖率100%就是完全遮盖,即黑色和白色区域之间的涂膜后不存在任何差异。

        使用步骤

        1、按照涂膜步骤将油漆等涂料均匀地涂布在油漆遮盖力测试纸上。

        2、等涂膜经空气充分干燥之后,利用仪器进行客观测评。

        3、遮盖力数值能于1秒内测量得并自动显示出来。

        油漆遮盖力测试纸不只局限于油漆等涂料遮盖力的测定,对应的遮盖力测试方法也可应用在透明薄膜和塑料产品的遮盖率检测。

        LENETA卡纸主要类型

        不透明度测试片: 利用大片的黑和大片的白来测试涂层的遮盖力 

        Penopac 测试片: 一张表内同时进行渗透力和遮盖力测试 

        显示片: 利用斜纹图案辅助显示涂层的遮盖力 

        不透明度显示片: 大片黑、大片白和斜纹图案的组合 

        涂布率测试片: 大于其它卡片,用于测量涂层的涂布率

        产品实拍图

        美国Leneta 3B罩光油遮盖力纸  美国Leneta 7B罩光油遮盖力纸


        遮盖力纸相关配置【需另购】

        涂膜棒

        涂膜棒为制备均匀膜度的涂层提供一种经济且方便的方法

        使用简单,易于清洁

        涂布时牢牢地固定卡纸

        有助于获得均匀的结果

        流平流挂试验

        Leneta 流平测试 (参见 ASTM D 4062)

        A.器材

        1.Leneta流平器,产品编号LTB-2;

        2.涂布流平度标准,产品编号LS-2;

        3.流平测试涂布板,产品编号DP-2;

        4.刮样纸Form WB,用于浅色油漆;Form 7B刮样纸用于深色油漆;

        5.垫纸,Form CP-2

        6.预剪切设备,参见产品目录第36页;

        B.涂料的预备

        1.完全搅拌,温度调整至23°C (73°F);

        2.必要时过滤和调整粘度;

        3.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.垫纸放置于涂布板上。

        2.将刮样纸紧靠涂布板的左引导边放置。

        3.流平器放在卡纸顶端位置,它的长臂紧靠左引导边并朝向操作者。

        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

               This is based on experience or experimentation and is highly subjective. It is important to emphasize that the Anti-Sag Index is not a wet film thickness value. It is the clearance in mils indicating the groove, so the indicating streak is approximately twice the wet film thickness. Neither the anti-sag index nor its corresponding approximate wet film thickness should be understood as a specific thickness in practice. It is a comparative tool and it can only achieve real results based on practical experience. Once the coating has shown good sag resistance in actual use, the sag index can be measured and thus realize the control of the sag value of the specific formulation.

               The anti-sag index may vary between different products. For example, latex paints generally have higher index values than solvent-based paints. The following judgments about sag performance are based on observations with a range of general gloss alkyd resin paints and are for informational purposes only. Do not take this as final Conclusion.

        Anti-sag index

        Sag resistance

        3
        4
        5
        6
        7
        8
        10
        12

        Very Poor (very poor)
        Poor (poor)
        Poor-Fair (bad to average)
        Fair (general)
        Fair-Good (general to good)
        Good (good)
        Very Good (very good)
        Excellent

         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.


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        LENETA Form 3B Opacity ChartSpecifications

        LIST VALUE
        Specifications and Dimensions 194*289mm
        Color style On white medium black on white
        type Sealed
        Encasement Specifications 250 sheets
        Weight 4.08kg
        Application field Coating inks

        LENETA Form 3B 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 3B Opacity Chart Comment

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        FAQ

        [Q]
        Is this one for dry covering power?
        [A]
        Yes!
        [Q]
        Does the LENETA Opacity Chart meet the ASTMD5007 standard?
        [A]
        The Opacity Chart for Form 3B can be referenced
        [Q]
        When will this test paper be available?
        [A]
        Hello, this is a pre-order product and requires a reservation.
        LENETA
        American Leneta 3B sealed Opacity Chart on white medium black under white
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        Focus on online sales of Lab Testing Instruments