LAB JAR TEST RECORD · CONCENTRATED DYE LIQUOR Concentrated Yellow Dye Liquor Taken to a Colourless Supernatant in Two Steps An alkaline yellow dye liquor at pH above 8. Only two reagents were needed — 25 kg/t of compound decolorant followed by 15 g/t anionic PAM. After 2–3 minutes the supernatant ...