I Replaced One Fragrance in a Two-Oil Blend — Do I Need to Retest the Entire Finished Blend?
शेयर करना
How do I calculate the grams? Total oil = candle weight × load; each component = total × share. 200 g at 8% = 16 g; 60 : 40 = 9.6 g + 6.4 g. See the blend maths.
Why premix? Small components are hard to weigh accurately. ±0.05 g is 0.78% of 6.4 g but only 0.25% of the 20.2 g in a 50.4 g premix.
What does it cost? New components only: ₹502.00 to test both CSI nerolis. Full nine-candle kit from scratch ₹2,954.02.
Why the blend, not the component, is what you retest
When a two-oil candle was developed, every test was run on the mixture: the throw, the flame, the pool, the jar heat, the storage. Neither oil was ever proven on its own at its share of the load, because nobody sells a candle that is 60% of a fragrance. So when one oil changes, there is no component-level result to fall back on. The only approval you ever held was for the blend, and the blend has changed.
It also matters that the candle does not burn two oils side by side; it burns one liquid. Once blended and mixed into wax, the two fragrances become part of a single fuel. In general candle-making practice, fragrance components can interact in the bottle and in the wax — affecting how the mixture smells, how it holds in the wax and how it burns — so a new neroli that behaves perfectly well on its own can still shift the blend. Those are commonly described mechanisms, not measurements; CSI publishes no burn, throw or compatibility data for any oil or combination.
The answer to the title is therefore yes — retest the finished blend as a unit, with a blend-level control (the old blend) beside the new blend, both at the same total load. What you do not need is a separate study of the new neroli on its own: that result would not tell you what the blend does. The 10% blend-change post explains why even a small share can move the system; the three-oil post covers rebuilding a blend when the scent balance has to be re-found.
The blend maths
CSI's convention applies the load to the blend, not to each oil: the total fragrance in the candle is W × L, and each component is that total times its share. For a 200 g candle at 8%, the blend is 16 g. At 60 : 40 that is 9.6 g of Bergamot Amber and 6.4 g of neroli, with 184 g of wax. A common error is applying 8% to each oil separately, which puts 16 g of each — 32 g, or 16% of the candle — into the jar. That is above the stated maximum of both CSI waxes that publish one: Luxury Soy Wax Chunks at 13% and CSI 464 at 10%.
| Total load | Blend per candle | Bergamot Amber | Neroli | Bergamot Amber / 100 candles | Neroli / 100 candles |
|---|---|---|---|---|---|
| 6% | 12 g | 7.20 g | 4.80 g | 720 g | 480 g |
| 8% | 16 g | 9.60 g | 6.40 g | 960 g | 640 g |
| 10% | 20 g | 12 g | 8 g | 1,200 g | 800 g |
Two practical consequences follow. First, the components are small: 6.4 g of neroli per candle is easy to weigh inaccurately. On a scale that reads to 0.1 g, the rounding alone can be ±0.05 g, which is 0.78% of the neroli in a single candle. Second, the fix is a premix: blend the oils in a bottle first, in a quantity large enough that the rounding hardly matters, and then dose the premix at 8%. In a 50.4 g premix the neroli is 20.2 g, and the same ±0.05 g is only 0.25% of it. Check your own scale's resolution; CSI's listed scale does not publish one in this data.
The retest matrix for a blend
| Result | Status | Why |
|---|---|---|
| Jar fill, wax routine | KEEP | Unchanged |
| Unchanged oil (Bergamot Amber) on its own | Not applicable | It was never approved alone; its blend results are void with the blend |
| Premix stability (clear, no separation) | NEW | New pair of oils in one bottle |
| Blend scent balance vs old blend | REPEAT | The swapped component may sit differently in the accord |
| Total load 8% | CONFIRM | Blend strength may differ |
| Hot and cold throw | REPEAT | Blend-level |
| Flame, carbon, soot, pool, jar heat | CONFIRM | The fuel has changed |
| End-of-life | CONFIRM | One pair to the end |
| Sweating and colour in storage | REPEAT | New mixture in the wax |
| Documents for the new component | NEW | MSDS / IFRA for the new oil |
| Cost per candle | NEW | New component price |
The second row is the one people argue with: "the Bergamot Amber hasn't changed, so its results stand." There were never results for it alone in this candle, only for the blend it was part of. That is not a reason to test it alone now; it is a reason to test the new blend as a whole.
The blend-level test
| Line | Candidate 1 · CSI Neroli | Candidate 2 · Neroli Signature Grade | Pass rule |
|---|---|---|---|
| Premix appearance | As clear and uniform as the control | ||
| Blind scent (strip and cold candle) | Not reliably distinguishable, or accepted as a product decision | ||
| Hot throw (blind 1–5) | Within the control's spread | ||
| Flame, carbon, soot | No worse than control | ||
| Pool and jar heat | No worse than control | ||
| Storage: droplets, colour | Same as control |
Decision rule: choose the candidate that passes every line; if both pass, choose on cost and supply security. If the only failure is scent character, go to a ratio round. If throw is weaker or stronger but everything else passes, adjust the total load — never the ratio and the load together — with a small ladder as in the load-ladder post. If a burn line fails, the new component does not suit this blend in this system; the mushrooming post shows how to diagnose it.
The priced kit and the cost of each candidate
| Item | Need | Buy | Price |
|---|---|---|---|
| Neroli Fragrance Oil (candidate 1) | 20.2 g | 2 × 15 g | ₹236.00 |
| Neroli Signature Grade (candidate 2) | 20.2 g | 2 × 15 g | ₹266.00 |
| Bergamot Amber Fragrance Oil (if you don't hold it) | 2 × 30.2 g = 60.5 g | 1 × 50 g + 1 × 15 g | ₹385.02 |
| Old neroli + Bergamot Amber (control) | 20.2 g + 30.2 g | Your stock | — |
| Premium Coconut Soy Wax CSI 468 | 1,738.8 g | 2 × 1 kg | ₹1,300.00 |
| Eco Candle Wicks Thin C1 (example) | 9 + spare | 1 × 10 | ₹59.00 |
| White Matte Glass Jar | 9 jars | 2 packs of 5 | ₹708.00 |
| Full kit from scratch | ₹2,954.02 | ||
| New-component spend only | ₹502.00 |
Two 15 g bottles of Neroli (₹236.00) cover the premix and cost less than one 50 g bottle (₹342.20) — one of the few cases where the smallest size is the right test buy. In production, at the 1 kg rates, the blend in a 200 g candle costs ₹94.79 with Neroli and ₹100.83 with Neroli Signature Grade: 9.6 g of Bergamot Amber at ₹5.44 a gram plus 6.4 g of neroli. The difference is ₹6.04 a candle. Neroli's per-gram price is flat from 100 g to 1 kg; Neroli Signature Grade's falls slightly, from ₹7.99 to ₹7.60.
| Pack | Price | Per gram | Candles at 6.4 g |
|---|---|---|---|
| 15 g | ₹118.00 | ₹7.87 | 2.34 |
| 50 g | ₹342.20 | ₹6.84 | 7.81 |
| 100 g | ₹665.52 | ₹6.66 | 15.62 |
| 500 g | ₹3,327.60 | ₹6.66 | 78.12 |
| 1 kg | ₹6,655.20 | ₹6.66 | 156.25 |
| Pack | Price | Per gram | Candles at 6.4 g |
|---|---|---|---|
| 15 g | ₹133.00 | ₹8.87 | 2.34 |
| 50 g | ₹399.00 | ₹7.98 | 7.81 |
| 100 g | ₹799.00 | ₹7.99 | 15.62 |
| 500 g | ₹3,899.00 | ₹7.80 | 78.12 |
| 1 kg | ₹7,599.00 | ₹7.60 | 156.25 |
Release and record the new blend
The approved spec for a blend needs more than a recipe name. Record each component's exact listed name and supplier, the weight ratio (60 : 40), the grams per candle (9.6 g + 6.4 g), the total load (8% of finished weight), the premix size and date, the wax bag, the wick and the test result. Label the premix bottle with the same information; a premix without a label is an unapproved fragrance.
Keep a retained sample of the new component's lot and a small retained premix. If the other component ever changes too, change it in a separate round with this blend as the control — never both at once. The one-variable-at-a-time post explains why, and the same-name reformulation post covers what to do when a component keeps its name but a new lot arrives.
CANDLEMAKINGSUPPLIESINDIA supplies raw materials, not finished candles. We sell single oils, not blends, and we do not publish composition, compatibility or throw data for any combination. We list two nerolis and do not claim the dearer one is the closer match — the blend test decides.
Oil and wax prices come from live CSI listings pulled on 24 September 2026; wick and jar prices are those verified on 10 September 2026 (Blog 760). Component grams, premix quantities, weighing-error percentages and cost per candle are arithmetic.
The 60 : 40 ratio, 8% total load, premix size, three candles per blend and the premix check are working examples and practices, not standards. CSI 468 has no published fragrance ceiling in this data. Custom blends are your own formula. For help, message us on WhatsApp at +91 7397976926.
Frequently asked questions
- My Lavender Fragrance Was Discontinued and I Found Another Lavender That Smells Almost Identical — Can I Use the Same 8% Formula and Wick?
- My Signature Candle Uses Three Fragrance Oils and One Has Been Discontinued — How Do I Replace It Without Losing the Original Scent Balance and Candle Performance?
- I Changed Only 10% of My Fragrance Blend — Can Such a Small Modification Still Change Hot Throw or Wick Behaviour?
- My Replacement Sandalwood Fragrance Is Stronger than the Old One — Should I First Optimise Its Fragrance Load Rather than Automatically Using My Previous Percentage?
- I Replaced My Coffee Fragrance and the Candle Now Mushrooms More with the Same Wick — Why Can a Similar-Smelling Fragrance Burn Differently?
- My Fragrance Supplier Reformulated an Existing Oil but Kept the Same Product Name — Should I Repeat Candle Testing Before Using the New Batch Commercially?
- Why Is Changing One Variable at a Time Important When Reformulating a Commercial Candle?
- My Original Fragrance Costs ₹5,000 per Kg and the Replacement Costs ₹3,500 — How Do I Compare Them When They Require Different Fragrance Loads?
Customer reviews: The six reviews at the top of this page are genuine, published Judge.me reviews left by CSI customers on the product pages named on each card — Eco Candle Wicks, Premium Candle Wicking Needle and Bamboo Wick Holder. They are general product reviews, not assessments of the guidance set out here. Names, star ratings, dates and products are as recorded by Judge.me and wording is unedited. "Verified buyer" appears only on the three reviews Judge.me recorded as verified — Monika Deep, Subhankar Roy and Sneha Tamang; the reviews from Ashwini, LJ and Lalitha Jagan are published but not recorded as verified, and carry no badge.
Figures pulled 24 September 2026, CSI live pricing: Neroli Fragrance Oil ₹118.00 / 15 g, ₹342.20 / 50 g, ₹665.52 / 100 g, ₹3,327.60 / 500 g, ₹6,655.20 / 1 kg. Neroli Signature Grade ₹133.00 / 15 g, ₹399.00 / 50 g, ₹799.00 / 100 g, ₹3,899.00 / 500 g, ₹7,599.00 / 1 kg. Bergamot Amber ₹105.02 / 15 g, ₹280.00 / 50 g, ₹560.00 / 100 g, ₹2,718.00 / 500 g, ₹5,437.00 / 1 kg. Premium Coconut Soy Wax CSI 468 ₹325.00 / 500 g, ₹650.00 / 1 kg. Figures verified 10 September 2026 (Blog 760), wick packs rechecked 25 September 2026: Eco Candle Wicks Thin C1 ₹59.00 / 10; White Matte Glass Jar ₹354.00 / 5.
Non-price figures and assumptions: CSI convention: fragrance load is a share of the finished candle weight (oil = W × L, wax = W − oil). Three candles per variant, 3–4 hour burn cycles with full cool-down, and the 48-hour / 7-day / 14-day checkpoints are labelled working practices, not standards. CSI publishes no burn-test results, throw measurements, discolouration data, vanillin content, flash points, IFRA percentages per oil, wick-size-per-diameter charts or jar internal dimensions — every performance line on this page is something you measure against your own control candle. No CSI oil is described here as discontinued or reformulated; out-of-stock sizes are cited exactly as they stood on the 24 September 2026 pull. Material costs exclude labour, packaging, freight and GST. Prices and availability change — the linked product pages are always authoritative. Blend maths: total oil = W × L, component = total × share, by weight. The ±0.05 g figure assumes a 0.1 g-resolution scale — check yours. Fragrance ceilings: Luxury Soy Wax Chunks up to 13%, CSI 464 up to 10%; none published here for CSI 468.