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Darvan 7 is the industry standard dispersing agent for ceramic slip and glaze. If you're a ceramacist you know that properly tuned liquid clay slips and glazes are critical to successful ceramic and pottery manufacturing. The typical method of using sodium silicate and soda ash to deflocculate porcelain or clay casting slips can be a finicky process. Using Darvan 7N yields more predictable results; Slips and glazes that stay dispersed longer upon sitting and are less sensitive to over-flocculation. Darvan 7 does not attack plaster molds leading to longer mold life than sodium silicate dispersed slips. Darvan 7 has a shelf life of 2 years, because of this we rotate inventory often and guarantee fresh product. Go ahead add to your cart today and get back to what you do best, making beautiful pottery! 30 day money back guarantee.