SL28 was developed at Scott Laboratories in Kenya in the 1930s, selected from Kenyan landrace populations for drought tolerance and outstanding cup quality. In Kenya, it's associated with the blackcurrant, intense sweetness, and dense, complex acidity profile that makes Kenyan coffee distinct. Growing it in Colombia's Eje Cafetero rather than the Kenyan Central Highlands is the deviation here — and it's worth understanding what that shift changes.
The variety's Bourbon-Typica lineage means it roasts in the slow group — longer time to first crack than Pink Bourbon or Ethiopian heirlooms, needing more energy input. At 1,750m in Risaralda, this sits in the middle of Colombian altitude range. That's slightly lower than the high-altitude Kenyan lots SL28 is typically associated with, where the 25% elevation-explained variation in extraction yield is operating at full intensity.
Washed processing here means the cup reflects variety and terroir directly. The prune and nectarine notes are malic acid expression — the crisp stone-fruit character that SL28 produces at light roast, where malic survives rather than degrading through extended development. Black tea character in coffee typically signals moderate tannin-adjacent polyphenol extraction alongside moderate melanoidin development — compounds from the Maillard reaction that build body without pushing into heavier caramel or chocolate territory. The descriptor "juicy" in the flavor notes refers to mouthfeel — melanoidin content contributing to that coating, syrupy texture.
SL28's low yield makes it an unusual choice for Colombian producers, who typically work with Caturra, Castillo, or Colombia varieties that produce more per tree. Planting it at La Riviera is a deliberate quality-over-volume decision — the variety's cup quality earns the highest WCR catalog rating, placing it alongside Gesha as a reference standard for quality-focused low-yield cultivation.
The Chemex earns its 96/100 match here because the thick paper filter and SL28's natural character align perfectly. SL28 is a Bourbon-group variety with exceptional cup quality rated by WCR — its bright acid expression is precise, not aggressive. The Chemex's triple-bonded filter removes essentially all oils and insoluble fines, which means the prune and nectarine stone-fruit notes read with exceptional clarity rather than being muddied by lipid interference. The grind is pulled 40μm finer than Chemex default to compensate for the light roast's lower solubility — light-roasted beans are less porous and require more surface area exposure for adequate extraction. The slightly higher ratio (1:15-16 vs. standard) reflects the same logic. At 94°C, you're extracting through the bean's high density without risking the early-extraction bitterness that higher temps can trigger.
Troubleshooting
sour: Grind finer by ~22μm and raise temp 1°C. SL28 at light roast is dense and low-solubility — the Chemex's slow drawdown compounds this. Sourness means extraction stopped in the acids-first phase before malic and caramel compounds dissolved. Finer grind expands contact surface area to push past that ceiling.
thin: Add 1g dose or pull 15g water. The Chemex filter's heavy oil removal can make SL28 feel thinner than expected since the melanoidins responsible for juicy mouthfeel are present but modest at light roast. A metal filter swap will recover body if adjusting dose doesn't fully resolve it.
The V60 at 88/100 gives SL28's prune and black tea character room to develop through its faster, more technique-responsive drawdown. Where the Chemex slows things down with thick filtration, the V60's thinner paper and conical geometry allow fines to influence flow rate more directly — meaning grind precision matters here. The 460μm target (40μm finer than default) compensates for light roast's reduced solubility, providing the additional surface area that these dense beans need for adequate extraction. At 94°C and a 1:15–16 ratio, you're targeting the middle extraction window where SL28's malic acid (nectarine, stone fruit) and citric acid (black tea tannin-adjacent brightness) both express without the slow-phase polyphenols intruding. Swirling at the bloom and after each pour improves extraction evenness across the coffee bed.
Troubleshooting
sour: Grind finer by ~22μm and increase temp 1°C. SL28's dense structure at light roast means the V60's faster flow can outpace extraction — water moves through before fully dissolving the malic and caramel compounds. Sourness signals extraction is stalling in the early acids-first phase.
thin: Increase dose 1g or reduce water 15g. At light roast, SL28's melanoidin development is minimal — the juicy mouthfeel in the tasting notes relies on what's there. A metal V60 filter (like the Kone) will recover body without requiring dose adjustment if mouthfeel is the primary concern.
The Kalita Wave's flat-bottom design and three-hole drain create the most even extraction environment of the pour-over family — water distributes uniformly across the bed rather than channeling toward a single drain point. The 490μm grind (40μm finer than default) and 94°C temperature are calibrated for light roast density. The 1:16–17 ratio is slightly more dilute than the Chemex and V60 settings, which fits the Kalita's tendency to extract with marginally more efficiency due to the flat bed's uniform contact time. The black tea and juicy character of SL28 come through with good balance here — not as pristine as the Chemex, but more forgiving of pour technique.
Troubleshooting
sour: Grind finer by ~22μm and raise temp 1°C. The Kalita's three drain holes can allow water to move too quickly through a coarse grind of this light-roast SL28. Sourness indicates only acids have extracted — finer grind slows flow and extends contact time to reach the malic and caramel compounds.
thin: Add 1g dose or reduce water 15g. SL28 at light roast doesn't carry heavy melanoidin development, so the Kalita's paper filter removing remaining oils can tip the cup toward thin. A metal Kalita filter will add back perceived body if the ratio adjustment feels too concentrated.
The AeroPress brews this SL28 Colombian at 85°C with a 360μm grind — 40μm finer than standard for the light roast. The immersion format steeps the entire dose together, meaning hot water contacts all particles simultaneously for the full brew time, and the pressure-assisted finish drives extraction efficiently within the 1-2 minute window. The AeroPress's immersion approach tends to produce a well-balanced cup from SL28, since the even saturation and fine grind pull sweetness and body alongside the citric acidity rather than letting the acids dominate. The 1:12-1:13 ratio creates a concentrate where the prune and nectarine notes compress into a sweeter, more intense version of themselves. This concentrated format is a real strength for this bean — sip it straight for maximum impact, or dilute to taste.
Troubleshooting
sour: Grind finer by ~22μm or raise temp 1°C. At 85°C, SL28's light-roast density can resist full extraction — the stone-fruit compounds that define this bean's character (malic acid-driven nectarine and prune) need adequate heat and surface contact to dissolve past the acids-first extraction phase.
thin: Increase dose 1g or reduce water 15g. The AeroPress paper filter removes residual oils. At 1:12-13 this is already a concentrate-style brew, but SL28's modest melanoidin development at light roast means the cup can feel thinner than expected. A metal AeroPress filter will restore mouthfeel.
The Clever Dripper combines full immersion steeping with a paper-filtered drawdown — mechanically similar to the AeroPress but at pour-over temperature and volume. At 94°C with a 490μm grind (matching the Kalita setting), the Clever lets SL28's entire dose steep in contact with hot water for 3-4 minutes before releasing. This longer steeping window compared to pour-over means there's more time for malic acid and the caramel compounds underlying the prune and nectarine notes to dissolve fully. The result tends to be slightly fuller-bodied than a V60 but less transparent than a Chemex — a middle path that suits SL28's medium density profile well. The key advantage of immersion for this bean is extraction evenness: all particles spend the same time in contact with water, reducing the channeling risk that can make lighter roast pour-overs taste uneven.
Troubleshooting
sour: Grind finer by ~22μm and raise temp 1°C. The Clever's immersion phase means any coarseness in grind results in consistent under-extraction across all particles — unlike a pour-over where channeling might cause patchy results. Sourness here is systematic: finer grind is the cleanest fix.
thin: Increase dose 1g or reduce water 15g. The Clever's paper filter strips the small amount of lipid content SL28 carries at light roast. Since melanoidin body is modest, the cup can lean thin. If adjusting the ratio doesn't resolve it, try the Clever without a paper filter or with a metal mesh insert.
Light roast SL28 espresso is one of the more challenging extractions in specialty coffee. The bean profile shows solubility=low and density=high — the worst combination for espresso's rapid high-pressure extraction. Light roast espresso demands specific adjustments: the 1:1.9-2.9 ratio is deliberately extended (typical Italian espresso sits at 1:2), and at 93°C you're 1-2°C below standard espresso temperature to avoid magnifying the already-bright citric acidity. The 210μm grind is 40μm finer than default to compensate for density, not to increase flow resistance — you want long preinfusion at low pressure to hydrate the dense light-roast particles before full pressure hits. Expect the prune and black tea character to concentrate into bright, intensely sweet fruit-forward shots when dialed correctly.
Troubleshooting
sour: Grind finer by ~10μm and raise temp 1°C. Light-roast SL28 under pressure extracts acids first and fast — the dense Bourbon-group structure resists full dissolution at standard settings. Smaller adjustments than pour-over (10μm not 22μm) because espresso's narrow puck reacts sensitively to grind changes.
thin: Increase dose 1g or pull a shorter yield (reduce output by 5-10g). Light roast SL28 at extended ratios can produce shots that taste bright but watery. Unlike pour-over, a metal filter isn't available — dose and yield are the primary levers for managing TDS in espresso.
The moka pot operates at roughly 1.5 bar — far below espresso's 9 bar but still pressure-assisted extraction. The 310μm grind (40μm finer than default, medium-fine rather than espresso-fine) and pre-boiled water at 100°C starting temp are the two most important setup details for SL28 at light roast. Using pre-boiled water prevents the ground coffee from sitting in contact with heating water during ramp-up, which would extract bitter early-phase compounds at sub-optimal temperatures before pressure builds. The 1:9-10 ratio is concentrated — moka pot output is a functional espresso-style brew, not a full cup. SL28's prune and nectarine character at this concentration becomes more syrupy and intense. The black tea notes may lean toward bitter tannin territory at this method; that's inherent to the pressure-concentration dynamic, not a dial-in error.
Troubleshooting
sour: Grind finer by ~22μm and verify pre-boiled water procedure. SL28 at light roast is dense — if water temperature drops significantly during pressure buildup, extraction stalls in the acid phase. Pre-boiled water maintains temperature through the entire extraction, pulling through the stone-fruit compounds.
thin: Increase dose 1g or reduce water 15g. Moka pot output is inherently concentrated, but SL28 at light roast can produce a thinner-than-expected result if the basket isn't fully packed. Ensure the basket is level and full without tamping — tamping restricts steam flow and causes uneven extraction.
strong: Reduce dose 1g or add 15g water. Moka pot output should be diluted before drinking. If the SL28 concentration feels harsh and overpowering rather than just intense, the ratio is too tight. Adding water post-brew is the correct fix — not reducing basket fill, which creates uneven extraction.
The French press at 96°C and 960μm grind brings a notably different experience to SL28 than any paper-filtered method. The metal mesh plunger passes coffee oils and allows fine particles to remain in suspension — both contribute to the heavier, more tactile body that paper filters strip. For SL28, whose 'juicy' tasting note refers to mouthfeel as much as flavor, the French press actually delivers on that descriptor more literally than pour-over. The coarse grind at 960μm slows extraction in immersion to prevent overextraction during the 4-8 minute steep window. At 96°C (2°C above the pour-over setting), the higher heat compensates for the coarser particle size. The prune and black tea character comes through with more texture here — fuller and less precise than Chemex, but genuinely enjoyable if you prefer body over clarity.
Troubleshooting
sour: Grind finer by ~22μm or extend steep time by 1-2 minutes. SL28's dense light-roast structure means coarse French press grinds can hit only the surfaces. Sourness here signals the malic and caramel compounds are still locked in the bean interior. Finer grind or longer steep both drive extraction forward.
thin: Increase dose 1g or reduce water 15g. The French press passes lipids freely, so thinness here is a strength/yield problem rather than filter stripping. At light roast, SL28's melanoidin development is modest — additional dose is the most direct lever for adding perceived body.
Cold BrewFlash 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.