News Center
Latest information, brand activities
Calculation of paint quantity
Release time:
2021-02-19 15:59
Source:
1. Calculation of volume solids
Volume Solids (% Volume Solids): The volume ratio of the non-volatile component of the coating to the liquid coating.
Volumetric solids are calculated by the following formula:
Volume solids = dry film thickness/wet film thickness
2. Dry film thickness and wet film thickness
The coating thickness can be measured during the construction process, whether the coating is in a wet or dry film state.
The dry film thickness (DFT) is usually specified in the painting contract. The determination of the wet film thickness (WFT) can help determine how much thick coating must be applied to achieve the specified dry film thickness. The determination of wet film is conducive to the timely detection of errors in the thickness of each construction coating, in order to correct.
Given the specified dry film thickness, refer to the volume solids of the relevant product and calculate the corresponding wet film thickness, which can be calculated by the following companies:
Wet film thickness = dry film thickness/volume solids
3. Wet film thickness after dilution
In actual construction, a certain amount of diluent is often added to the paint. The use of a diluent increases the total volume, but does not increase the volume solids.
Calculate the wet film thickness of the diluted paint according to the following formula:
Wet film thickness after dilution = wet film thickness after dilution (1 +% dilution)/volume solids
4. Theoretical coating rate
The coating rate (Theoretical Spreading Rate) is a key factor for owners and contractors to calculate coating usage and cost.
The theoretical coating rate refers to the area (square meters) that can be coated per liter on a smooth surface without loss, and the unit is m2/L.
The theoretical coating rate is calculated according to the following formula:
Theoretical coating rate = (volume solids x 1000)/dry film thickness
5. Calculation of actual coating rate
The actual coating rate (Practical Spreading Rate) refers to the calculation of the actual coating rate by the theoretical coating rate minus the coating rate multiplied by the estimated loss percentage, calculated as follows:
Actual coating rate = theoretical coating rate x(1-% loss)
In fact, this loss percentage is uncertain, because the actual construction is affected by many factors, it is a comprehensive parameter of various loss factors: construction methods, workers' technology, the structure, shape, surface roughness, working environment, wind speed, high altitude, daytime and other paint film distribution.
6. Calculation of the actual amount of paint
The actual amount of coating is obtained on the basis of the actual coating rate and can be calculated according to the following formula:
Actual amount of coating = (area x dry film thickness) /[10 x volume solids x 100 x (1-loss%)]
Fax
0731-81877168
Address
China. Maqiaohe Road, Wangcheng District, Changsha City, Hunan Province Section 2 No. 279
Copyright: Xiangjiang Paint Technology Co., Ltd.
This website already supports IPV4 / IPV6 bidirectional access