- No wine, equipment, printing or advance reading is required. The narrator explains the technical documents during the lesson.
Level 4 · Lesson 6
Oxygen, Reduction, and Sulfur
4:48C30
Before you press play
No shopping or worksheets required
The lesson explains the winery decisions and technical documents as you watch. These references are here to revisit, not homework you must finish first.
- After class, cut three equal apple pieces. Leave one exposed, cover one tightly, and acidulate one with lemon. Compare browning after a fixed interval. This models oxidation control only; wine is a far more complex system.
- The complete lesson and quiz can be followed without alcohol.
Documents discussed in this lesson
Technical sheets and source material
- Ridge — 2023 Estate Chardonnay technical sheet (PDF)
- Ridge — 2023 Estate Chardonnay vintage and winemaking data
Use the named wine, vintage and document section. Producer process accounts and research guidance are labeled separately from vintage technical sheets. A disclosed choice is evidence of a process, not a guaranteed flavour.
Ridge’s 74 ppm describes sulfur used over the course of ageing—not a measured total at bottling or a free or molecular sulfur result.