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Fining For Defects

This overview presents a case study on the fining processes used for the 2012 Diamond Muscat "Ice Wine" produced in Fresno County. It emphasizes the significance of identifying the components responsible for haze and flavor attributes in winemaking. The study details protocols adapted from Brock University, along with insights from winemaking experts. Key findings include pressing techniques, sugar concentrations, and adjustments made for optimal acidity levels. The case study opens avenues for discussing the various methodologies in winemaking and the impacts of fining.

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Fining For Defects

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  1. Fining For Defects Chik Brenneman University of California

  2. Overview • Case study approach • Needs for fining/clarification depend on the components responsible for the haze/flavor attributes • Winemaking approach often will dictate the specific need (or lack thereof) for fining

  3. Diamond Muscat • Released in 2000 as an early season white seedless • Has potential for high yields • Typically a raisin (Golden Muscat) or table grape • Has potential for wine or concentrate production

  4. Diamond Muscat

  5. Case Study: 2012 Diamond Muscat“Ice Wine” from Fresno County (KAC) • Wine making protocol adapted from Brock University and advice from Daniel Pambianchi (Maleta Winery, Niagara, Ontario, Canada • Dried on vine until brix ̴35 • 788# harvested 8/20/2013 Cold Storage • Delivered to UCD pilot winery 8/21/2013 • Cold Storage overnight

  6. Case Study: 2012 Diamond Muscat • Whole cluster press, Bucher Vaslin XPF22 • Initial pressure to 1.0 bar • Working pressure 0.5 bar • Press cycle duration = 5 hours • Yield 107 gallons/ton (44 gallon yield) • SO2 addition of 50 mg/L to juice

  7. Case Study: 2012 Diamond Muscat • Cold Settled at 6 C overnight • Racked • Brix 34.8, TA=4.44 g/L, pH=3.85 • Tartaric Acid to target 6.0 g/L TA • TA = 5.93 g/L, pH = 3.51 • Yeast Lallemand QA23 (4#/K) • N supplement as recommended (300 mg/L)

  8. Case Study: 2012 Diamond Muscat

  9. Wine Data

  10. Wine Data

  11. Conclusions • Open for discussion

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