5.3.5 Water, distilled or deionized (see 12.7) 5.3.6 Sodium hypochlorite (NaOCI) bleach (see 12.8). 5.3.7 Sulfuric acid (h2SO4), 10% {see 12.8.1) 5.3.8 Potassium iodide (ki), 10% (see 12.8.1). 5.3.9 Sodium thiosulfate {Na2S203),0.1N (see 12.8.1}. 5.3.10 Crockmeter test cloth cut in 50mm (2 in.) squares (see 12.9).5.3.11 White cards (specimen mounts) with Ytristimulus value at least 85%.