SW-179 Muddy WatersCone 6 oxidation: Muddy Waters is a matte brown glaze with crystals that melt into a glossy blue. Heavier crystal application will produce more color variation. Cone 10 reduction: Glossy blue becomes more prominent. Increased movement. TIP: SW 174 Leather is the base glaze. For a lighter crystal effect, you may try applying two coats of SW 174 Leather with a third coat of SW 179 Muddy Waters. Wood and soda firing results will vary.