Test methods evaluating the water resistance of garments will be discussed later in this document.
Consequently, some test methods that use water as a challenge agent may not be representative for evaluating the barrier effectiveness of the healthcare PPE and may overestimate the effectiveness of the PPE for blood-borne pathogens. ASTM D806-11 Cement Content of Hardened Soil-Cement Mixtures. ASTM D8008 Standard Practice for Representative Field Sampling of Traffic Paints. I revised the standard based on new structural and chemical information discovered by my mentor Dr. One of the first standards I was involved with was the anorganic bone standard. This is because liquids with higher surface tension, like water (0.070–0.072 N/m), are more likely to bead on a surface than liquids with lower surface tension, which are more likely to wet and penetrate through the garment. ASTM A312/A312M-17 Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes. ASTM standards serve to delineate important properties that impact performance, like device dissolution or degradation, properties that depend on material structure. Within the context of gowns and coverall testing, the surface tension of the challenge liquid is critical. In addition, it addresses sampling and test methods to assure that the zinc coating is being furnished properly. Synthetic blood has a surface tension (0.042 ± 0.002 Newton per meter ) and viscosity representative of blood and some body fluids (see Table 2 for surface tension of the body fluids). The ASTM A123-17 document details specifications for materials, including the steel or iron, zinc, and bath composition, and coating properties, such as the coating thickness, finish, and appearance. The synthetic blood used for these tests is a mixture of cellulose, coloring, buffer solution, and stabilizing agents.
ASTM F1670 and ISO 16603 are “screening-tests” that evaluate the resistance of a material to synthetic blood penetration.