Ruby Coffee Roasters

Colombia El Tablon de Gomez

colombia medium-light roast washed caturra, colombia, castillo
caramelplumblackberrydried apricot

Nariño sits at Colombia's southern edge, close to the Ecuadorian border. The department's growing zones push to some of the highest altitudes in Colombian specialty coffee — 1,850 meters in El Tablon de Gomez is typical for the region. Higher altitude means slower cherry maturation: the extended development window allows greater accumulation of organic acids and volatile precursors in the seed before harvest. The variety blend here — Caturra, Colombia, and Castillo — covers a range of the genetic groups common to Colombian specialty. Caturra is a Bourbon mutation with characteristic bright citric acidity and low-to-medium body. Variedad Colombia is an introgressed variety with Timor Hybrid genetics, bred for rust resistance by Colombia's FNC, with more roasty, chocolatey tendencies when underdeveloped but improving cup quality under careful roasting. Castillo is similar — a rust-resistant FNC variety that's historically been debated in specialty circles but responds well to altitude-driven soluble concentration. Washed processing is the dominant method for this region, and it's the right fit for a mixed-variety lot: removing the fruit layer early and fermenting the mucilage away neutralizes variety-to-variety fermentation variation across the smallholder network. What reaches the grinder is a clean read of what 1,850 meters of Nariño altitude put into all three varieties. At medium-light roast, development extends past light-roast territory — more Maillard compounds building alongside the organic acids still present. The caramel and plum notes reflect that balance: caramel from Maillard browning products, plum and blackberry from citric and malic acid character at development levels where both are still intact, and dried apricot from malic acid's stone fruit dimension. Pushing to medium would tip the balance toward Maillard dominance and degrade the fruit brightness the altitude built in.
Hario V60-02 88/100
Grind: 480μm Temp: 93°C Ratio: 1:15.3-1:16.3 Time: 2:30-3:30

The V60's open cone and single spiral rib require active management of flow rate — which is exactly why the grind sits 20μm finer than default and the ratio dials in slightly tighter at 1:15.3–16.3. This Nariño washed lot carries medium solubility across its Caturra-Colombia-Castillo blend, so the finer grind compensates for the mix's lower-extraction-yield varieties (particularly Castillo and Variedad Colombia, which both need full extraction to develop sweetness rather than reading roasty). At 93°C — one degree below default — you reduce the risk of pushing the Colombia/Castillo introgressed genetics into bitterness before the brighter fruit character fully resolves. The plum and blackberry notes are acid-driven; the V60's paper filter strips oils that would muddy those fruit flavors, letting the clean washed profile at 1,850m read clearly through.

Troubleshooting
sour: Grind finer by ~22μm and raise temp 1°C. With Caturra's bright citric character at light-medium development, underextraction leaves the malic and citric acids unbalanced by the Maillard sweetness. Finer grind increases surface area to pull more caramel compounds into solution.
thin: Increase dose by 1g or reduce water by 15g. The Colombia/Castillo blend has moderate solubility — if TDS feels low, more mass is the direct fix. A metal filter is also worth trying; it passes the oils that the paper strips and adds perceived body.
Kalita Wave 185 88/100
Grind: 510μm Temp: 93°C Ratio: 1:16.3-1:17.3 Time: 3:00-4:00

The Kalita Wave's flat-bottom, three-hole design distributes water pressure evenly across the bed, reducing the channeling risk that can skew extraction unevenly through a mixed-variety lot. With Caturra, Variedad Colombia, and Castillo ground together, particle density varies slightly between varieties — the Wave's uniform extraction geometry means fines from the higher-density Castillo beans don't overdraw while larger Caturra particles underextract. The grind sits at 510μm (20μm below default) and ratio at 1:16.3–17.3, consistent with the V60 settings, because this bean's medium solubility doesn't warrant method-specific deviation. At 93°C, the relatively forgiving extraction window of this washed, medium-light lot means the dried apricot character resolves cleanly before the higher-temperature bitter compounds appear.

Troubleshooting
sour: Grind finer by ~22μm and raise temp 1°C. The Wave's even extraction geometry means uneven sourness usually points to grind size, not distribution. Finer particle size increases contact surface so Maillard caramel sweetness keeps pace with the citric brightness from Caturra.
thin: Increase dose by 1g or reduce water by 15g. At this ratio the Wave is already slightly tighter than standard, so thin cups indicate TDS is genuinely low. A metal filter can help if texture is the issue, but dose adjustment addresses the root cause.
Chemex 6-Cup 86/100
Grind: 530μm Temp: 93°C Ratio: 1:15.3-1:16.3 Time: 3:30-4:30

Chemex filters are 20–30% denser than standard V60 paper — that extra filtration is a meaningful variable for this bean. The washed Nariño process already removes fermentation-derived compounds during washing, so what arrives in the cup is determined almost entirely by what the 1,850m altitude and the three-variety blend developed in the bean itself. The Chemex amplifies that terroir-forward character by stripping residual oils that might add body at the cost of clarity. Grind is 20μm finer than default to compensate for the slower drawdown that thicker paper creates — maintaining extraction yield even as flow rate drops. At 93°C, the caramel note from roast development at medium-light resolves cleanly without triggering the bitter compounds that the Colombia and Castillo genetics can produce when overheated.

Troubleshooting
sour: Grind finer by ~22μm and raise temp 1°C. Chemex's slow drawdown can actually help extraction, but if the grind is too coarse, the dense filter restricts contact without enough surface area. Finer grind ensures the caramel and plum notes develop past the initial acid-extraction phase.
thin: Increase dose by 1g or reduce water by 15g. Chemex strips oils aggressively — if the cup feels watery rather than tea-like, the problem is strength, not filter choice. A metal filter swap can add perceived body, but only after confirming dose and ratio are correct.
AeroPress 85/100
Grind: 380μm Temp: 84°C Ratio: 1:12.3-1:13.3 Time: 1:00-2:00

AeroPress at 84°C is a notable departure from the V60's 93°C — that 9-degree difference is intentional. The pressurized extraction environment raises effective extraction efficiency, partially compensating for lower temperature. More importantly, the lower heat reduces the extraction of bitter compounds, which is relevant for Variedad Colombia and Castillo: these introgressed genetics respond to extraction temperature more sharply than pure Bourbon-lineage varieties, and cooler water keeps their extraction in the fruity-caramel register rather than the roasty range. The 380μm grind (20μm below default) adds surface area to maintain yield despite the cooler water. The ratio at 1:12.3–13.3 produces a concentrated brew — blackberry and caramel are amplified rather than diluted — well-suited to AeroPress's inherently shorter brew window.

Troubleshooting
sour: Grind finer by ~22μm and raise temp 1°C. At 84°C, extraction of Maillard sweetness is already suppressed relative to the pour-over methods — insufficient grind fineness leaves the Caturra's citric brightness without enough caramel balance. Small grind adjustment has outsized effect at lower temperatures.
thin: Increase dose by 1g or reduce water by 15g. AeroPress ratio is already concentrated at 1:12.3, so thin cups suggest actual TDS shortfall rather than body issues. A metal AeroPress cap passes oils and can add texture if the brew strength is acceptable.
Clever Dripper 85/100
Grind: 510μm Temp: 93°C Ratio: 1:15.3-1:16.3 Time: 3:00-4:00

The Clever Dripper's immersion mechanics mean the coffee bed saturates completely and sits in contact with water for a controlled steep period before release — a meaningful advantage for this three-variety Colombian lot. Washed Caturra-Colombia-Castillo benefits from the Clever's full immersion because it eliminates the channeling risk where fines from denser Castillo beans extract faster than Caturra boulders in a dynamic pour-over. Every gram of coffee sits in the same thermal environment at 93°C for the same duration. The grind at 510μm matches the Wave, and the ratio at 1:15.3–16.3 aligns with the V60 — consistent across pour-over and hybrid immersion methods because the bean's medium-solubility profile doesn't require method-specific ratio adjustment. The plum and blackberry fruit acids resolve cleanly in the balanced immersion environment.

Troubleshooting
sour: Grind finer by ~22μm and raise temp 1°C. The Clever's immersion should reduce extraction variance, so persistent sourness means total extraction is genuinely low — finer grind increases contact surface to pull caramel sweetness alongside the citric fruit acids.
thin: Increase dose by 1g or reduce water by 15g. The Clever's paper filter strips most oils, so thin cups are a strength issue. A metal filter swap adds body by passing oils — particularly useful for this washed lot where immersion time is already optimized.
Espresso 83/100
Grind: 230μm Temp: 92°C Ratio: 1:1.3-1:2.3 Time: 0:25-0:30

Espresso at 92°C — one degree below default — applies a modest temperature reduction for this medium-light roast, balancing extraction efficiency against the risk of pulling harsh bitterness under pressure. The grind at 230μm (20μm below default) combined with a ratio of 1:1.3–2.3 keeps the shot on the longer side for a medium-light roast, which is correct — faster, shorter shots under-extract the caramelization compounds responsible for the caramel and plum character, leaving the shot sour from unbalanced citric and malic acids. Sourness is the primary risk at espresso because the pressure amplification of all compounds means any extraction shortfall reads immediately and intensely in the cup.

Troubleshooting
sour: Grind finer by ~10μm and raise temp 1°C. Espresso amplifies every extraction deficit — the Caturra's citric brightness hits sharply when shot ends before caramel and Maillard sweetness dissolve. Small grind adjustments matter: 10μm at 230μm base is roughly 4%, which is significant at these pressures.
thin: Increase dose by 1g or decrease output by 15g (tighter ratio). At 1:1.3–2.3, a thin shot means either the dose is low or the yield ran long. Closing the ratio pushes TDS higher and lets the blackberry and caramel concentrate as intended.
Moka Pot 81/100
Grind: 330μm Temp: 99°C Ratio: 1:9.3-1:10.3 Time: 4:00-5:00

Moka pot pressure (~1.5 bar vs. espresso's 9 bar) concentrates without true high-pressure extraction, which changes the extraction dynamic significantly for this washed medium-light Colombian. At 99°C with a 20μm grind reduction to 330μm, the goal is controlled extraction that pulls the caramel and plum character without triggering the roasty, slightly bitter register that Variedad Colombia and Castillo can produce under aggressive thermal conditions. Pre-boiled water in the base is especially important here: filling with cold water means the grounds cook in rising steam at suboptimal temperature before the brew cycle begins, which overdevelops bitter compounds before the fruity acids have time to follow. The ratio at 1:9.3–10.3 produces a concentrated cup — the dried apricot character reads clearly at this strength.

Troubleshooting
sour: Grind finer by ~22μm and raise temp 1°C using pre-boiled water. With Colombia/Castillo genetics, underdevelopment at the grind stage leaves malic acid from the apricot dimension unbalanced. Finer grind increases surface area for the short moka pot brew cycle.
thin: Increase dose by 1g or reduce water by 15g. Moka pot's fixed chamber geometry limits ratio flexibility, so dose is the primary control. The concentrated format tolerates a slightly heavier dose without the overflow risk that plagues looser filters.
strong: Decrease dose by 1g or increase water by 15g. If the Castillo/Colombia roasty character is reading harsh at full concentration, diluting slightly can shift the balance toward the plum and caramel notes that develop more gently.
French Press 79/100
Grind: 980μm Temp: 95°C Ratio: 1:14.3-1:15.3 Time: 4:00-8:00

French press metal mesh passes oils and insoluble solids that paper filters block — for this washed Nariño lot, that's a mixed signal. The washed process removed most fermentation-derived compounds during processing, leaving a clean, acid-driven cup; the French press reintroduces body through oils and fine particle sediment that the bean's own processing minimized. The grind at 980μm (20μm below default) and 95°C temperature are modest adjustments from baseline. The Castillo and Colombia genetics are less soluble than pure Caturra, which is why the grind nudges finer despite the coarse French press setting — maintaining extraction evenness across varieties. Hoffmann's extended steep-and-settle method (4 minutes press, then 5–8 minutes to let grounds fall) is especially beneficial here: it allows the stone fruit character to develop fully without the bitterness from extended mechanical agitation.

Troubleshooting
sour: Grind finer by ~22μm and raise temp 1°C. French press's immersion reduces channeling risk, so sourness here usually means total contact surface is insufficient for the mixed-variety solubility profile. Finer grind helps particularly with the denser Castillo fraction.
thin: Increase dose by 1g or reduce water by 15g. French press already passes oils that paper-filtered methods strip, so thin cups here genuinely mean TDS is low rather than body being filtered away. Dose up before adjusting other variables.
Cold Brew Flash Brew Recommended

Cold brew is not recommended for this bean. At near-freezing temperatures, cold water cannot extract the complex acids, delicate aromatics, and bright fruit compounds that define a light-roasted coffee — they remain locked in the cell matrix. For a cold version of this coffee, use flash brew: brew a concentrated pour-over (V60 or Chemex at 60% of the normal water volume) directly over ice in the server. The hot water extracts the full flavor spectrum, and the rapid ice cooling locks in volatiles that would otherwise evaporate during a slow cool-down.