ASTM D2697 PDF

ASTM D2697 PDF

or both, the greater will be the deviation of the coverage calculation (This is also true to a lesser degree with Test Method D). For various reasons the. ASTM D is intended to provide a measure of the volume of dry coating obtainable from a given volume of liquid coating. This value is useful for comparing. Comparison of the ASTM D Method and the film thickness method for obtaining volume solids 3. Bibliography.

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This value is useful for comparing the coverage d2967 feet of surface covered at a specified dry film thickness per unit volume obtainable with different coating products.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The values given in parentheses are for information only. One reason is that the volume occupied by a solution of resin in solvent may ashm the same, greater, or less than the total volume of the separate ingredients: It is the responsibility of the user of d269 standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Since the actual coverage of a coating includes the void volume and the porosity of the film, the coverage value calculated from this method will be inaccurate by that amount, that is, the actual coverage will be greater. This provides a more accurate determination of void volumes than can be obtained via liquid displacement. Helium solves this problem since, as a gas, it readily penetrates and displaces air, water, and volatile solvents even at low pressures.

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It is aatm responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Link to Active This link will always route to the current Active version of the standard.

Historical Version s – view awtm versions of standard. Above the critical d2679 volume concentration, the apparent volume of the dry film is significantly greater than theoretical due to the increase in unfilled voids between pigment particles.

ASTM D – 03 Standard Test Method for Volume Nonvolatile Matter in Clear or Pigmented Coatings

Such contraction or expansion of resin solutions is governed by a number of factors, one of which is the extent and direction of spread between solubility parameters of the resin and solvent. Purging the gas pycnometer flushes these materials from the film. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. One reason is that the volume wstm by a solution of resin in solvent may be the same, greater, or less than the total volume of the separate ingredients.

The values ashm in parentheses are mathematical conversions to SI units that ashm provided for information only and are not considered standard. Earlier collaborative studies included a gloss enamel, a flat wall paint, a gloss house enamel, an industrial baking enamel, an interior latex paint, and an exterior latex paint.

The improvement in accuracy stems from the superior ability of helium gas under pressure to penetrate very small pores and surface irregularities in dried films. The use of volume nonvolatile matter values in such instances should be carefully considered as the increased volume is largely due d26697 air trapped in these voids. Historical Version s – view previous versions of standard. An interlaboratory study to establish the precision of this test method included a water-reducible exterior latex paint and three automotive coatings that included a solvent-reducible primer astj, water reducible primer surfacer, water reducible enamel topcoat, and acrylic dispersion lacquer topcoat.

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Volume Nonvolatile Matter in Clear or Pigmented Coatings – ASTM D2697

This value is useful for calculating the aetm organic content VOC of a coating and could be used to estimate the coverage square feet of surface covered at a specified dry film thickness d697 unit volume obtainable with different coating products.

The approach used should provide faster and more accurate results than the use of the liquid displacement technique in Test Method Dparticularly for coatings that are difficult to wet or that contain voids, cracks or other defects. Above the critical pigment volume concentration, the apparent volume of the dry film is significantly greater than theoretical due to the increase in unfilled voids between pigment particles. Prior to this method a satisfactory procedure for measuring percent volume nonvolatile did not exist see Note 11 in Practice D The use of volume nonvolatile matter values in such instances should be carefully considered as the increased volume is largely due to air trapped in these voids.

Link to Active This link will always route to the current Active version of the standard. With high poly vinyl chloride PVC films, however, liquid displacement of air voids takes place with difficulty even under high pressures. In Practice D paragraph