OSE Services offers testing of paints, bases and hardeners in accordance with the ACQPA standard:
Density ISO 2811-1 (- 4 depending on product viscosity)
Dry extract to ISO 3251
Ash content according to NFT 30 012
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Dry extract :
Is a measure of the quantity of solid matter remaining after evaporation of water or other solvents from a liquid solution or coating.
It is commonly used in the coatings and paint industry to determine the amount of solids in a paint or coating.
The principle of dry extract involves taking a precise quantity of the liquid solution or coating, then evaporating it completely to remove all the solvent.
The remaining solid residue is then weighed and expressed as a percentage of the initial quantity of solution or coating.
Calculating the dry extract is important because it determines the percentage of solids in a paint or coating. Coatings with a high solids content generally have better wear resistance and durability, which can be important in harsh or aggressive environments.
Density :
A picnometer is a measuring instrument used to determine the density of a liquid.
It generally consists of a small glass bottle with a tight-fitting stopper and a graduated pipette for taking a precise volume of liquid.
The density obtained using a picnometer is accurate because it is measured at a constant temperature and pressure, and does not depend on the optical properties of the liquid, such as colour or turbidity.
Density is an important characteristic of liquids in industry, as it can affect many properties, such as viscosity, thermal conductivity, solubility and vapour density.
Ash content :
The analysis of ash in paint is a common method used to determine the amount of inorganic residue remaining after the combustion of a paint.
This method is often used to assess the quality of industrial paints, particularly those used in high-temperature environments.
The principle of ash analysis is to burn a known quantity of paint at a high temperature to completely eliminate the organic compounds.
The remaining inorganic residues are then collected and weighed to determine the quantity of ash.
The paint to be analysed is placed in a high-temperature oven and heated until it is completely burnt.The resulting inorganic residue is collected in a container and accurately weighed. The mass of ash is then calculated by subtracting the mass of the empty container from the mass of the container with ash.
Ash analysis is a simple and rapid technique for assessing paint quality, but it does not provide detailed information on the chemical composition of the ash. More advanced techniques, such as mass spectrometry, can be used to determine the specific elements present in the ash and provide more detailed information about its composition.
