The HK-0093-2 Particle Contaminant Color Comparison Plate meets the requirements for color rating of aviation turbine fuel filter membranes specified in Appendix A of Test Method SH/T 0093 and Appendix X1 of Test Method ASTM D2276. It is suitable for determining the pollution degree caused by color changes of jet fuel and increase of impurities due to various factors, and judging its grade by means of comparison.