37+2.8+35+25(YL-series) is the smallest ratio formula, we use the formula to make one bright green panel P216/RAL 250-3,it passed neutral salt spray test(test time was during 2017.6.23-2017.7.14) which is made by China Coating Quality Supervision and Inspection Center . For details, Please check the test report (report No.:TW171363Y1).