The Untitled Extraction Yield Matrix: Beyond TDS
Most home brewers fixate on Total Dissolved Solids (TDS) as the holy grail of extraction. But TDS is merely the surface. True “untitled” mastery lies in understanding which solids are extracted — and when.
Chlorogenic acids break down between 195°F–205°F into quinic and caffeic acids. Extract too early? Sour, grassy notes dominate. Extract too late? Bitter, astringent quinic acid overwhelms. The “sweet spot” isn’t a number — it’s a curve shaped by time, temperature, agitation, and grind geometry.
“In untitled brewing, you’re not chasing a percentage — you’re choreographing molecular release. A 20.8% extraction yield means nothing if your quinic-to-chlorogenic ratio is off.” — Jim Morton, Liberty Beans Head Roast Scientist
- Under-extracted (16–18%): Sharp citric acidity, hollow body, tea-like thinness
- Balanced (19–21%): Layered sweetness, structured acidity, aromatic complexity
- Over-extracted (22%+): Dry bitterness, muted aromatics, phenolic harshness
Extraction Yield vs. Perceived Flavor Profile
| Extraction % | Dominant Acid Profile | Mouthfeel | Aroma Compound Peak |
|---|---|---|---|
| 16–17% | Malic, Citric | Watery, Thin | Green apple, lime zest |
| 18–19.5% | Tartaric, Succinic | Silky, Juicy | Jasmine, stone fruit esters |
| 20–21% | Acetic, Lactic | Velvety, Rounded | Caramelized sugar, toasted almond |
| 22%+ | Quinic, Phenolic | Dry, Astringent | Charred wood, burnt rubber |
Water Mineral Ion Dynamics: Magnesium vs Calcium in Flavor Transport
Water isn’t neutral. Its mineral composition acts as a selective solvent. Magnesium ions (Mg²⁺) preferentially extract bright, acidic compounds. Calcium ions (Ca²⁺) pull heavier sugars and melanoidins. An “untitled” brew demands deliberate water formulation — not tap, not distilled, not third-wave branded packets.
Optimal Water Ion Ratios for Untitled Precision Brewing
| Mineral | Ideal PPM Range | Flavor Impact | Source Recommendation |
|---|---|---|---|
| Magnesium (Mg²⁺) | 10–20 ppm | Enhances acidity, floral top notes | Epsom salt (food-grade) |
| Calcium (Ca²⁺) | 40–60 ppm | Builds body, caramel sweetness | Calcium chloride or gypsum |
| Bicarbonate (HCO₃⁻) | 30–50 ppm | Buffers acidity, stabilizes pH | Baking soda (sparingly) |
| Total Hardness | 80–120 ppm | Balance without chalkiness | Test with GH/KH kits |
“Use distilled water and you’ll taste paper. Use hard tap water and you’ll taste limestone. Untitled brewing requires engineered water — calibrated like a lab reagent.” — Jim Morton
- Start with reverse osmosis (RO) or distilled base water.
- Add MgSO₄ for brightness (0.1g per liter = ~10ppm Mg²⁺).
- Add CaCl₂ for body (0.15g per liter = ~40ppm Ca²⁺).
- Adjust bicarbonate with NaHCO₃ only if brew tastes overly sharp (0.05g/L max).
- Verify with TDS meter and GH/KH test strips.
Roast Thermodynamics: How Untitled Profiles Unlock Hidden Compounds
Liberty Beans’ “untitled” roasts aren’t named because they’re defined by thermal behavior, not origin stories. Each batch is tracked via Rate of Rise (RoR) curves, endothermic transitions, and development time ratios (DTR). A 14% DTR at 405°F yields radically different sucrose fragmentation than 18% DTR at 412°F — even from the same Ethiopian lot.
Key Thermal Milestones in Untitled Roast Profiling
- Turning Point: Bean temp rebounds after initial drop. Target: 320–340°F within 90 seconds.
- Maillard Onset: Sugars caramelize, amino acids react. Begins around 365°F. Duration dictates nutty vs fruity bias.
- First Crack: Cellulose fractures, CO₂ bursts. Ideal entry: 398–402°F. Hold RoR decline to 8–10°F/min.
- Development Phase: Post-crack reactions define finish. Short DTR (12–14%) = bright, tea-like. Long DTR (18–22%) = chocolate, spice.
Burr Alignment & Particle Distribution: The Silent Killers of Consistency
Even the finest grinder fails if burrs are misaligned. A 0.1mm offset creates bimodal distribution — fines that choke and boulders that under-extract. “Untitled” consistency demands calibration beyond factory specs.
Grind Calibration Checklist for Untitled Precision
- Disassemble grinder. Clean burrs with food-safe alcohol and brush.
- Reinstall with alignment jig (or folded paper method for flat burrs).
- Test with 20g sample: sieve stack analysis (ASTM E11 standard).
- Ideal spread: 70% within target micron range (e.g., 400–600µm for pour-over).
- Reject if >15% fines (<200µm) or >10% boulders (>800µm).
Interactive Brewing Ratio Panel: Dialing In Your Untitled Brew
Brewing Ratio Calculator: Weight, Time, Temperature
Input Variables:
- Coffee Dose: 20g (adjust ±2g based on roast density)
- Water Volume: 300g (1:15 ratio baseline)
- Target Extraction: 20.2% (adjust ±0.5% for roast darkness)
- Water Temp: 203°F (lower for light roasts, higher for dark)
Output Parameters:
- Grind Size: Medium-fine (like table salt)
- Bloom Time: 45 sec (2x coffee weight in water)
- Pour Structure: 3 pulses (100g → 100g → 100g), 30 sec intervals
- Total Brew Time: 2:45–3:15 min
Tip: If brew tastes sour, increase dose by 1g or extend total time by 15 sec. If bitter, coarsen grind or reduce temp by 3°F.
Bean Selection Framework: Untitled Origins & Cellular Density Metrics
Forget “single-origin” labels. “Untitled” sourcing evaluates beans via cellular density (grams per cubic centimeter), moisture content post-rest, and defect-free green grading (SCA Q-Grade 85+ minimum). High-density beans (≥0.72 g/cm³) withstand aggressive extraction without hollowing out.
- High-Density Picks: Kenyan SL28 (0.75 g/cm³), Colombian Caturra Washed (0.73 g/cm³)
- Medium-Density: Brazilian Pulped Natural (0.68 g/cm³), Sumatran Mandheling (0.69 g/cm³)
- Low-Density Avoid: Low-altitude Robusta blends (<0.65 g/cm³), aged beans with >12% moisture
Every Liberty Beans “untitled” lot is laser-sorted, density floated, and roasted within 72 hours of final QC. No marketing name needed — the data speaks.