ASTM D7539 Standard Practice for Humidity Regulation of Pavement Marking Coatings test Boards using a laboratory defines a standard environment with a temperature of 23±2°C, a relative humidity of 50± 5%, and no airflow for the normal regulation and testing of paints, 바니시, lacquers, and related materials.
의미와 용도

5.1 The drying rate of organic coatings varies with temperature, air flow and relative humidity. 특히, the drying rate of water-based coatings depends on the evaporation of water and is therefore more dependent on relative humidity than solvent-based coatings or 100% solid coatings. Without some control over drying conditions, the drying rate of water-based coatings measured in the laboratory under ambient conditions cannot be adequately replicated. A test chamber providing a device for controlling relative humidity above ambient humidity and minimizing the effect of changes in airflow at ambient room temperature is described. If needed,

5.2 This practice is particularly useful for testing the drying rate of waterborne pavement marking (traffic) 코팅, where rapid drying at high ambient humidity is an important feature. For waterborne traffic coatings, test chambers can be used to assess dryness to non-absorption at high ambient humidity (test method D711) and washable resistance (practice D7377 and D7538).

ASTM D7539-2015 실험실을 사용하는 포장 도로 마킹 코팅 테스트 보드의 습도 조절에 대한 표준 실습

단계 1: 범위

1.1 Specification D3924 defines a standard environment with a temperature of 23±2°C, a relative humidity of 50± 5% and no airflow for the normal conditioning and testing of paints, 바니시, lacquers and related materials. The practice describes a test chamber that allows the control of relative humidity above the ambient relative humidity and minimizes air flow to regulate the test board at elevated relative humidity and room temperature.

1.2 인치에서 파운드까지의 값은 표준 값으로 간주됩니다.. 괄호 안의 값은 SI 단위의 수학적 변환이며 참조용일 뿐이며 표준으로 간주되지 않습니다..

1.3 이 표준은 모든 안전 문제를 해결하기 위한 것이 아닙니다., 만약에 어떠한, 그 사용과 관련된. 적절한 안전 및 보건 관행을 확립하고 사용 전에 규제 제한의 적용 가능성을 결정하는 것은 이 표준 사용자의 책임입니다..