What does “untitled” mean in specialty coffee? In the context of Liberty Beans Coffee, “untitled” represents the uncharted territory of precision brewing — where extraction yield, water chemistry, and roast thermodynamics converge to create flavor profiles too complex for simple naming. It’s not a label omission; it’s an invitation to explore coffee’s deepest scientific and sensory dimensions.
The Science Behind the Name: Why “Untitled” Isn’t Random
In specialty coffee, names often denote origin, varietal, or processing method. But “untitled”? That’s deliberate. It signals a departure from commodified labeling toward experiential exploration — where flavor isn’t boxed by marketing tags but revealed through extraction science and roast dynamics.
Liberty Beans uses “untitled” as shorthand for coffees whose full expression can’t be captured by a single descriptor. These are micro-lots with volatile aromatic compounds, shifting acidity structures, and evolving mouthfeel profiles across roast degrees. Naming them would limit perception. Leaving them untitled invites curiosity — and precision.
“An untitled coffee demands you measure twice, brew once. It doesn’t forgive sloppy technique — because its potential is too high to waste.” — Jim Morton, Roast Architect, Liberty Beans
Water Chemistry & Its Role in Extraction Yield
Coffee is 98% water — yet most home brewers ignore its mineral composition. Magnesium ions (Mg²⁺) enhance bright, floral notes by bonding with citric and malic acids. Calcium ions (Ca²⁺) stabilize body and sweetness. Too little, and your extraction stalls at 16%. Too much, and bitterness creeps in via over-solubilized quinic acid polymers.
| Mineral | Ideal Range (ppm) | Flavor Impact | Risk if Imbalanced |
|---|---|---|---|
| Magnesium (Mg²⁺) | 10–30 ppm | Brightens acidity, enhances florals | Flat, muted cup if deficient |
| Calcium (Ca²⁺) | 30–60 ppm | Builds body, stabilizes sweetness | Harshness, chalky finish if excessive |
| Bicarbonate (HCO₃⁻) | 40–70 ppm | Buffers pH, rounds out acidity | Dulls vibrancy, mutes terroir if >100ppm |
Use Third Wave Water or custom remineralization tablets. Never use distilled — zero ions = zero extraction efficiency. Aim for TDS between 75–150 ppm and pH 6.5–7.5. Test with a handheld TDS meter and adjust accordingly.
Grind Size, Particle Distribution, and TDS Optimization
Grind size isn’t just “fine” or “coarse.” It’s about particle distribution uniformity — measured via laser diffraction analysis. A bimodal grind (large + fine particles) causes channeling: water finds paths of least resistance, under-extracting fines while over-extracting boulders.
- Aeropress (Fine): 400–600 microns — targets 18–20% extraction yield
- Pour Over (Medium-Fine): 600–800 microns — ideal for 19–21% extraction
- French Press (Coarse): 900–1200 microns — avoids sediment, caps extraction at 17%
“Your grinder is more important than your brewer. A $500 kettle won’t fix a $50 burr set producing fractured particles.” — Dr. Emma Lin, Extraction Chemist, SCA Research Fellow
Calibration Checklist for Burr Grinders
- Zero your grinder (touch burrs until they chirp, then back off 1 notch).
- Weigh dose pre- and post-grind — loss indicates static or retention.
- Use a USB microscope to check for bimodal distribution.
- Adjust for temperature drift — burrs expand when hot, altering gap width.
Roast Thermodynamics: How Heat Profiles Shape Flavor Compounds
Roasting isn’t baking — it’s pyrolysis, Maillard cascades, and Strecker degradation occurring in real-time thermal gradients. At 180°C, chlorogenic acids break down into caffeic and quinic acid. At 200°C, sucrose caramelizes into furans (nutty) and pyrazines (earthy). At 220°C+, oils migrate to surface — enhancing body but risking rancidity.
Liberty Beans uses fluid-bed roasters with PID-controlled airflow and drum speed modulation. Each “untitled” batch is roasted to hit specific delta-T inflection points:
- First Crack Onset: 196–202°C — preserves origin acidity
- Development Time Ratio (DTR): 12–18% — balances sweetness without baking
- Rate of Rise (RoR) Curve: Declining but never flat — avoids baked, hollow flavors
Interactive Brewing Ratio Panel: Dialing In Your Perfect Cup
Step 1: Choose Your Brew Method
- Espresso: 1:2 ratio, 25–30 sec, 9 bars
- Pour Over: 1:16 ratio, 2:30–3:00 min bloom + drawdown
- Immersion: 1:15 ratio, 4:00 steep, plunge/filter
Step 2: Adjust for Extraction Yield
| Taste Feedback | Action | Chemical Reason |
|---|---|---|
| Sour, thin | Grind finer, increase time/temp | Under-extracted acids (citric, malic) |
| Bitter, dry | Grind coarser, reduce temp | Over-extracted quinic/lignin compounds |
| Flat, muted | Increase agitation, check water TDS | Channeling or low ion concentration |
Step 3: Validate with Refractometer
Aim for 18–22% extraction yield and 1.15–1.35% TDS in final beverage. Use VST Coffee Tools app to log and graph trends.
From Chlorogenic to Quinic Acid: The Bitter Truth in Your Cup
Chlorogenic acid (CGA) is coffee’s primary antioxidant — abundant in green beans. During roasting, CGA hydrolyzes into caffeic acid (pleasant bitterness) and quinic acid (harsh, medicinal bitterness). Light roasts preserve CGA — yielding tea-like clarity. Dark roasts push conversion to quinic — creating perceived “strength” at the cost of balance.
Gas chromatography-mass spectrometry (GC-MS) reveals untitled lots from Ethiopia Guji contain elevated 3-caffeoylquinic acid — which degrades slower, preserving brightness even at medium roasts. This is why we don’t name them “bright” or “fruity” — their acid structure evolves uniquely per roast profile.
Acid Degradation Timeline During Roast
- 160–180°C: CGA stable — dominant in light roasts
- 180–200°C: CGA → Caffeic + Quinic (1:1 ratio)
- 200–220°C: Quinic polymerizes — increasing astringency
- >220°C: Melanoidins mask acid flaws — “roasty” cover-up
Direct-Trade Logistics: Sourcing Untitled Potential from Origin
“Untitled” begins at origin — with farmers who track Brix levels at harvest, ferment in climate-controlled tanks, and dry on raised beds with UV-filtered tarps. Liberty Beans partners with 3 co-ops in Colombia Huila, Ethiopia Yirgacheffe, and Guatemala Huehuetenango — all using refractometers to measure mucilage sugar concentration pre-wash.
Shipping matters: vacuum-sealed GrainPro bags with O₂ absorbers preserve volatile esters. Temperature-controlled containers prevent condensation-induced mold. Every lot is cupped within 72 hours of arrival — scored on SCA form for fragrance, acidity, body, and aftertaste. Only lots scoring 88+ become “untitled.”
Burr Alignment, Channeling, and Micro-Extraction Consistency
Even a 0.1mm misalignment in conical burrs creates uneven shear forces — generating fines on one side, boulders on the other. This isn’t detectable by eye. It’s measurable via extraction yield variance across multiple brews from the same dose.
Solution: Use alignment shims or the “marker test” — color burr faces with Sharpie, grind 50g, inspect wear pattern. Uneven? Adjust. Also, purge grinders between doses — stale grounds absorb moisture and clump, causing erratic flow.
| Issue | Diagnostic Tool | Correction |
|---|---|---|
| Channeling in pour-over | Timed drawdown + taste mapping | Swirl slurry, lower pour height, use gooseneck |
| Inconsistent espresso shots | Shot mirror + pressure profiling | WDT tool, distribute with tapping, pre-infuse |
| Static cling in grinder | Grounds sticking to chute/hopper | Add 1 drop water to beans pre-grind (Ross Droplet Technique) |