What Is the Complete Process for Making 100 ml Reed Diffusers in India, from Selecting a Base and Fragrance Oil to Testing Reeds and Buying Raw Materials in Bulk?
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How much oil and base per 100 ml? At 20% by weight, 20 g oil + 80 g base for a 100 g fill at an example 1.00 g/ml (95 g–105 g at ±5%).
Can I buy diffuser base in bulk? CSI lists bases in 500 ml (Pure Performance also 100 g) — no 1 kg, 5 kg or 25 kg listing. Larger quantities are quoted on WhatsApp; no discount is published.
What do the three purchases cost? Clarity screen ₹2,480.00, reed test ₹3,821.00, first run of 60 ₹27,473.00. See the production order.
The whole process on one page
This page is the capstone of the first section of the series, "How to make a reed diffuser that actually works". The nineteen posts before it each answer one question in depth — which raw materials to buy, how to mix, how to stop cloudiness, how to make it last, how to scale to fifty gifts. Here they are joined into one path from an idea to bulk buying, with the gate at each stage that decides whether to spend on the next. Every number is worked for one example so you can see the whole chain: a 100 ml finished diffuser in CSI's 120 ml Gold bottle, Jasmine at 20% in Lift Base (whose page names jasmine), black fibre reeds.
The straight answer: choose the base by the family its page names, screen your oil's clarity at three loads, test three reed counts in your real bottle, measure thirty days of weight loss and blind room scores, cost the bottle, make a first run in recorded sub-batches, and only then buy in bulk — in 500 ml multiples of base and 500 g or 1 kg packs of oil. At an example density of 1.00 g per ml, a 100 ml fill weighs 100 g: 20 g of oil and 80 g of base. If your blend is 5% lighter or heavier the same 100 ml is 95 g to 105 g, which is why every stage weighs rather than measures. The three purchases total ₹33,774.00 before tools, and the first two cost less than one production pack of oil.
| Stage | What you do | Gate to pass before the next stage | Owned by |
|---|---|---|---|
| 1 · Choose | Pick a family; read which CSI base page names it; buy the oil in its smallest size | A written formula hypothesis: oil, base, target load | 7901, 7921, 7905 |
| 2 · Screen clarity | Three loads in two bases, white and black cards, 48 h, 7 days, cool night | A load that stays clear, with one step of margin | 7913, 7910, 7906 |
| 3 · Test reeds | Three reed counts × three bottles at the chosen load, in your real bottle | A reed count that hits your room target without draining fast | 7917, 7971 |
| 4 · Measure 30 days | Weigh, score blind, photograph reeds, log room temperature | A measured liquid life and scent life | 7911, 7979 |
| 5 · Cost and price | Liquid + bottle + reeds + your packaging; margin and cost per day | A price that covers cost with your target margin | 7982, 7983 |
| 6 · First production run | Sub-batches by weight, batch record, fill tolerance, retained bottle | Every bottle passes the release checklist | 7915, 7914 |
| 7 · Buy in bulk | Round to real packs; ask for larger quantities on WhatsApp | Sales, not hope, justify the quantity | 7985, 8000 |
| 8 · Release and repeat | Triangle test each batch against the retained bottle | No drift between batches | 7919, 7997 |
Stage 1: choosing the base and the fragrance oil
CSI lists five in-stock reed and car diffuser bases, and their pages differ mainly in the families they name. Lift Base ("perfumery-grade") names floral, citrus, green and fruity, including jasmine. Softness Base names soft florals including jasmine too, plus powdery and light gourmand. Longevity Base names amber, woody and resinous and describes slower "cold diffusion". Depth Base names leather, smoky and rich gourmand. Pure Performance Base is neutral, for all families, and is the only base also sold in 100 g. All give 10–30%, and Pure Performance recommends 20%. CSI HyperDiffusion Base™ is out of stock and not offered. No CSI base page publishes its composition, density, viscosity or evaporation rate, and none of these bases is described by CSI as DPG, Augeo-type or alcohol-based.
That gives a simple rule for stage one: use the base whose page names your fragrance family as the candidate, and Pure Performance as the control. The fragrance oil is bought in its smallest in-stock size — 15 g where listed — because stages two and three use only grams. If you are weighing a ready-made base against making your own from solvents, the ready-made or own-solvents post and the comparison of Augeo-type, DPG and alcohol formulas cover it; if you want a formula with no alcohol, the 100 ml method without alcohol is the starting recipe, and the water-free base post explains why diffuser bases avoid water.
| Choice | Example | Why | Price at the smallest useful size |
|---|---|---|---|
| Family | White floral | Your brand's choice | — |
| Fragrance oil | Jasmine | Floral; in stock from 15 g to 1 kg; one of the few oils cheaper per gram at 1 kg | ₹103.00 / 15 g · ₹230.00 / 50 g |
| Candidate base | Lift Base | Its page names jasmine | ₹1,099.00 / 500 ml |
| Control base | Pure Performance Base | Neutral, all families | ₹325.00 / 100 g |
| Target load | 20% | Pure Performance's recommended figure; within 10–30% | — |
| Bottle and reeds | 120 ml Gold bottle, 100 ml fill; black fibre reeds | Your product | ₹1,062.00 / 10 · ₹236.00 / 25 |
Stage 2: screening clarity
A diffuser that clouds is a failed product however it smells, so the first spend is a clarity screen. Mix 30 g vials of the oil at 15%, 20% and 25% in each base — six vials in clear 50 ml Gold bottles — and check each against a white and a black card at mixing, 24 h, 48 h (the base pages' rest), 7 days and after a cool night. The working load is one step below the highest load that stayed clear through every checkpoint. Weigh base first, then oil, and mix the same way every time; the mixing method covers technique and the 20% / 80% compatibility check the reading.
| Item | Need | Buy | Price |
|---|---|---|---|
| Gold Reed Diffuser Bottle 50 ml (as vials) | 6 | 1 × pack of 10 | ₹826.00 |
| Jasmine | 37.8 g | 1 × 50 g | ₹230.00 |
| Lift Base | 75.6 g | 1 × 500 ml | ₹1,099.00 |
| Pure Performance Base | 75.6 g | 1 × 100 g | ₹325.00 |
| Stage 2 total | ₹2,480.00 |
Most of the Lift bottle and four of the 50 ml bottles are left after the screen, and they carry straight into stage three. If both bases hold the same top load, you already know the base adds nothing measurable for clarity with this oil; if one holds a higher load clear, that is your production base. Preventing cloudiness runs the full five-rung ladder if you want to probe the limit precisely.
Stage 3: testing reeds in your real bottle
With a clear load chosen — 20% in Lift in this example — make nine 120 ml bottles filled to 100 g and test three reed counts: six, eight and ten, three bottles each. CSI's fibre reed page suggests 6–8 for a standard 50–100 ml bottle, more for stronger and faster diffusion, fewer for subtler and longer-lasting; ten tests the top end for a 100 ml fill. Reed diameter is not published, so a count that works for these reeds is specific to them. Weigh every bottle with its reeds, flip once at the first hour, then once a week on a fixed day, and score the room blind against a target you write before you start.
| Item | Need | Buy | Price |
|---|---|---|---|
| Gold Reed Diffuser Bottle 120 ml | 9 | 1 × pack of 10 | ₹1,062.00 |
| Fiber Diffuser Reeds (Black) | 76 (6+8+10 × 3, + 4 spare) | 1 × pack of 100 | ₹800.00 |
| Jasmine | 189.0 g | 2 × 100 g | ₹860.00 |
| Lift Base (top-up after stage 2) | 756.0 g | 1 × 500 ml | ₹1,099.00 |
| Stage 3 total | ₹3,821.00 | ||
| Weighing scale + 250 ml beaker (if you have none) | 1 each | 1 each | ₹954.00 |
Read the reed test as two numbers per arm: the room score against your target, and grams per day. The right reed count is the lowest one that meets the target, because extra reeds empty the bottle faster. If your product is sold for several rooms, bathrooms, bedrooms and living rooms shows how one liquid can carry different reed counts, and a small Indian apartment covers the risk of over-scenting small spaces. A 120 ml bedroom diffuser applies the same test to one room.
Stage 4: thirty days of measurement
Keep the stage-three bottles running for thirty days. Weigh weekly, score the room blind weekly, photograph two reeds per bottle against a white card, and note room temperature. Two lifetimes come out of it: liquid life — usable grams divided by grams lost per day — and scent life — the days the room score stays above your threshold. As an example of the arithmetic only: a bottle losing an example 2.0 g a day with an example 8 g of residue the reeds cannot draw has a liquid life of (100 g − 8 g) ÷ 2.0 = 46 days. Your bottles will give their own figure, and CSI publishes no evaporation or longevity data for any base, oil or reed.
| Reed arm | g/day wk 1 | g/day wk 4 | Score wk 1 | Score wk 4 | Projected liquid life | Scent life | Reed colour wk 4 | Room temp range |
|---|---|---|---|---|---|---|---|---|
| 6 reeds | ___ | ___ | ___ | ___ | ___ | ___ | ___ | ___ |
| 8 reeds | ___ | ___ | ___ | ___ | ___ | ___ | ___ | ___ |
| 10 reeds | ___ | ___ | ___ | ___ | ___ | ___ | ___ | ___ |
Thirty days is a working checkpoint, not a full life; it is enough to rank arms and project life, and you keep one bottle per arm running to the end to measure residue. The living-room longevity method explains fade versus consumption, the 30-day test gives a fuller sheet, the hotel-inspired consistency test adds a week-to-week steadiness rule, and the premium finish post measures residue and rings at the end.
Stage 5: cost per bottle, price and margin
With the formula fixed, the cost is arithmetic. At the 1 kg Jasmine rate (₹3.92 a gram) and Lift at ₹1,099.00 per 500 ml, the 100 g of liquid costs ₹254.30 at the example 1.00 g/ml — ₹263.55 if the blend is 5% lighter, ₹245.93 if 5% heavier. Bought at the 100 g rate the same liquid is ₹261.84; Jasmine is one of the oils whose 1 kg pack is genuinely cheaper per gram, by 8.8%. Most oils on CSI's listed catalogue are not: above 100 g they are priced almost linearly, so bigger packs buy convenience and one lot, not a lower rate.
| Line | Per bottle | Note |
|---|---|---|
| Liquid: 20 g Jasmine + 80 g Lift | ₹254.30 | 1 kg oil rate, 500 ml base, example 1.00 g/ml |
| 120 ml Gold bottle | ₹106.20 | pack of 10 |
| 8 black fibre reeds | ₹64.00 | ₹8.00 each from 50 up |
| CSI materials | ₹424.50 | |
| Label (example) | ₹8.00 | replace with your printer's quote |
| Box (example) | ₹45.00 | replace with your supplier's quote |
| Cost before labour, freight, GST | ₹477.50 | |
| Gross margin on an example ₹799.00 | 40.2% | (price − cost) ÷ price |
| Markup on cost | 67.3% | (price − cost) ÷ cost |
| Liquid cost per day at an example 2.0 g/day | ₹5.53 | over 46 example days |
Margin and markup answer different questions; quote both to yourself and know which a buyer means. The cost per day of use is the number to compare when someone suggests a cheaper base or a lower load — comparing loads by cost per day and the full 100 ml cost go deeper, and the ₹799 margin post works backwards from a target margin.
Stage 6: the first production run of 60
60 bottles at 100 g is 6,000 g of blend: 1,200 g of oil and 4,800 g of base, or 1,236.0 g and 4,944.0 g with a 3% cling allowance — a labelled working assumption you replace after your first batch. The base is sold by volume, so density decides the bottle count: 10 × 500 ml at the example 1.00 g/ml, 11 at 0.95 g/ml, 10 at 1.05 g/ml. Order for the lighter case unless you have weighed 100 ml of your blend at stage two — which settles it.
| Item | Need | Buy | Price | Left over |
|---|---|---|---|---|
| Jasmine | 1,236.0 g | 2 × 500 g + 2 × 100 g + 1 × 50 g | ₹5,012.00 | 14.0 g |
| Lift Base | 4,944.0 g (5,204 ml at 0.95 g/ml) | 11 × 500 ml | ₹12,089.00 | 296 ml at 0.95 g/ml |
| Gold Reed Diffuser Bottle 120 ml | 60 | 6 × pack of 10 | ₹6,372.00 | 0 |
| Fiber Diffuser Reeds (Black) | 488 | 1 × pack of 500 | ₹4,000.00 | 12 |
| Production order | ₹27,473.00 |
Reeds are the one item where a large pack does not save money: the 500-pack is ₹8.00 a reed, the same as the 50-pack. Here it is still the cheapest way to cover the need. The 50-bottle corporate method adds a client-approval pilot and a full batch record; the 10-bottle quantity post is the smaller version of this order.
Stage 7: buying raw materials in bulk
"Bulk" for a reed diffuser maker means different things for each material, and it is worth being exact. CSI lists its diffuser bases only as 500 ml (and Pure Performance also as 100 g). There is no 1 kg, 5 kg or 25 kg base listing; a larger quantity is several 500 ml bottles or a quote on WhatsApp, and no volume discount is published. Fragrance oils go up to 500 g and 1 kg per listing for most oils, but per-gram savings are rare: of 91 oils listing both 100 g and 1 kg, only 24 show a saving of 5% or more, and Jasmine's 8.8% is one of them. Reeds stop getting cheaper at 50. Bottles come in tens at the same price per bottle.
| Material | Largest listed pack | Per-unit step | What to do |
|---|---|---|---|
| Diffuser base | 500 ml (Pure Performance also 100 g) | None between 500 ml bottles | Buy n × 500 ml; ask on WhatsApp for larger quantities — no published discount |
| Jasmine oil | 1 kg | ₹4.30/g at 100 g → ₹3.92 at 500 g → ₹3.92 at 1 kg | A real break — 1 kg once the formula is fixed |
| Most other oils | 500 g or 1 kg | Usually within about 1% from 100 g up | Buy for convenience and one lot, not price |
| Black fibre reeds | 500 | ₹9.44 each at 25 → ₹8.00 from 50; none after | Packs of 50 or 100 are as cheap as 500 |
| White fibre reeds | 500 | ₹10.60 each at 25 → ₹9.00 from 50; none after | Same: 50 is the break |
| Gold bottles | Pack of 10 | Same per bottle at any quantity | Buy in tens to your run size |
The honest rule for stage seven is that sales, not price breaks, decide bulk quantities. Hold enough for your next run plus a buffer you choose, reorder from sales records, and ask on WhatsApp before planning around larger base quantities. 1 kg, 5 kg or 25 kg of base? translates those reader quantities into 500 ml bottles, monthly wholesale requirements sets reorder levels from expected sales and your own lead times, and starting a profitable reed diffuser business is the series capstone for the business as a whole.
Stage 8: release, records and repeat
Every later batch repeats stage six and passes stage eight before it ships: fill weights within tolerance, a card check, and a blind triangle test against the retained bottle of the approved batch. CSI publishes no lot numbers or lot-to-lot data, so your retained bottles and order dates are the record. A new oil, a new base or a new bottle is a change — re-run the stage it affects rather than assuming the old result holds. The premium finish post details the release checklist, and the quality-control checklist extends it to leakage, stability and packaging.
| At the gate | If this is true | Do this |
|---|---|---|
| Stage 2 | No load clear in either base | Don't buy production. Change oil (from 15 g) or family |
| Stage 2 | Both bases clear to the same load | Use Pure Performance Base for production if stage 3 agrees |
| Stage 3 | No reed count meets the room target | Check position and airflow; then one load step within IFRA |
| Stage 4 | Scent life far shorter than liquid life | Fade problem — test the base the page names or fresh reeds |
| Stage 5 | Price cannot cover cost at your margin | Don't produce. Revisit oil, bottle size or price |
| Stage 6 | Any sub-batch hazy or fills out of tolerance | Hold it; never blend it into passing stock |
| Stage 7 | Sales cover the next run | Reorder in real packs; ask for larger quantities on WhatsApp |
The CSI products in the worked example
| Size | Price | Per unit | Bottles at 80.0 g base |
|---|---|---|---|
| 500 ml | ₹1,099.00 | ₹2.20 per ml | 6.2 (at an example 1.00 g/ml) |
| Size | Price | Per unit | Bottles at 80.0 g base |
|---|---|---|---|
| 100 g | ₹325.00 | ₹3.25 per g | 1.2 |
| 500 ml | ₹1,099.00 | ₹2.20 per ml | 6.2 (at an example 1.00 g/ml) |
| CSI HyperDiffusion Base™ (different product) | ₹1,499.00 | — | Out of stock — not offered |
| Pack | Price | Per gram | Bottles at 20.0 g oil |
|---|---|---|---|
| 15 g | ₹103.00 | ₹6.87 | 0.8 |
| 50 g | ₹230.00 | ₹4.60 | 2.5 |
| 100 g | ₹430.00 | ₹4.30 | 5.0 |
| 500 g | ₹1,961.00 | ₹3.92 | 25.0 |
| 1 kg | ₹3,923.00 | ₹3.92 | 50.0 |
| Pack | Price | Per reed | Bottles at 8 reeds |
|---|---|---|---|
| Pack of 25 | ₹236.00 | ₹9.44 | 3.1 |
| Pack of 50 | ₹400.00 | ₹8.00 | 6.2 |
| Pack of 100 | ₹800.00 | ₹8.00 | 12.5 |
| Pack of 500 | ₹4,000.00 | ₹8.00 | 62.5 |
| Variant | Price | Per bottle | Stock (14 Oct 2026) |
|---|---|---|---|
| 50 ml · pack of 10 | ₹826.00 | ₹82.60 | In stock |
| 120 ml · pack of 10 | ₹1,062.00 | ₹106.20 | In stock |
Every question in this section
This capstone joins the twenty posts of "How to make a reed diffuser that actually works". Each one below answers its question in depth; the stage it belongs to is in brackets.
| Your question | Stage | Post |
|---|---|---|
| Starting at home — what raw materials, which base first? | 1 | 7901 |
| A 100 ml diffuser with fragrance oil and a ready-made base, no alcohol | 1–2 | 7902 |
| A 120 ml luxury diffuser that fills a bedroom | 3 | 7903 |
| How much base and oil for 10 × 100 ml? | 6 | 7904 |
| Ready-to-use base or my own solvents? | 1 | 7905 |
| 20% oil + 80% base — checking compatibility | 2 | 7906 |
| Without water — which type of base? | 1 | 7907 |
| The same fragrance oil for candles and diffusers? | 1 | 7908 |
| Strong but not overpowering in a small apartment | 3 | 7909 |
| Mixing so the liquid stays clear and uniform | 2 | 7910 |
| A living-room diffuser that lasts several weeks | 4 | 7911 |
| A hotel-inspired diffuser — which families and base? | 1–4 | 7912 |
| A diffuser that does not go cloudy | 2 | 7913 |
| Without a heating machine — what equipment? | 6 | 7914 |
| 50 diffusers for corporate gifting | 6 | 7915 |
| A brand with three fragrances — first trial batch | 1–3 | 7916 |
| Bathrooms, bedrooms, living rooms at different strengths | 3 | 7917 |
| Essential oils instead of fragrance oils | 1–2 | 7918 |
| Premium: clear, consistent, little residue | 8 | 7919 |
Four more sections pick up where a stage points. Which reed diffuser base to buy in India owns the base decision in depth, with Augeo-type, DPG and alcohol formulas compared. How much fragrance oil to add to 100 ml owns the load. Weak throw: base, oil or reeds? owns diagnosis when a diffuser underperforms. Starting with ₹10,000 and starting a profitable reed diffuser business own the business and wholesale buying.
CANDLEMAKINGSUPPLIESINDIA supplies raw materials, not finished diffusers. The largest sale to a new diffuser maker is a bulk order before any test. This page puts two small test purchases before production, tells you that most of our oils are not cheaper per gram at 1 kg, that our bases are listed only in 500 ml with no published volume discount, and that we publish no composition, evaporation or longevity data for any base, oil or reed.
Diffuser bases, fibre reeds, Gold Reed Diffuser Bottles, beakers, scale, mixer and essential oils are CSI live pricing, pulled 14 October 2026. Fragrance-oil prices are CSI live pricing, pulled 24 September 2026, stock re-checked 14 October 2026; out-of-stock sizes are marked and never offered. Every gram split, millilitre conversion, per-bottle cost and kit total on this page is computed and shown to two decimals so you can check it.
Bottle counts per arm, checkpoints, room protocols, scoring scales, example densities, example fill volumes and example evaporation rates are labelled working practices or placeholders, not industry standards or CSI measurements. The 100 ml fill, the 3% and 5% allowances, the 60-bottle run, the 2.0 g/day loss rate, the 8 g residue, the label, box and ₹799.00 price, and the stage timings are labelled examples you replace. For help building a test kit, bulk quotes, GST invoicing, MSDS or IFRA documents, message us on WhatsApp at +91 7397976926.
Frequently asked questions
- I Want to Start Making Reed Diffusers at Home in India — What Raw Materials Do I Need and Which Ready-Made Base Should I Buy First?
- How Do I Make a 100 ml Reed Diffuser Using Fragrance Oil and a Ready-Made Diffuser Base Without Using Alcohol?
- How Do I Make a Reed Diffuser That Does Not Become Cloudy After Adding Fragrance Oil?
- How Do I Make 50 Reed Diffusers for Corporate Gifting Using a Consistent Formula and Ready-Made Diffuser Base?
- How Do I Make Reed Diffusers for Bathrooms, Bedrooms and Living Rooms Without Using the Exact Same Fragrance Strength for Every Space?
- Which Reed Diffuser Base Should I Buy in India if I Want Strong Fragrance Diffusion and a Reasonable Product Life?
- What Is the Difference Between Augeo-Type Diffuser Bases, DPG and Alcohol-Based Formulas for Reed Diffusers?
- How Much Fragrance Oil Should I Add to 100 ml of Reed Diffuser Base if I Want a Strong-Smelling Finished Product?
- My Reed Diffuser Smells Strong When I Open the Bottle but Barely Fragrances the Room — Is the Problem the Base, Fragrance Oil or Reeds?
- How Do I Start a Profitable Reed Diffuser Business in India — From Choosing the Correct Base and Fragrance Percentage to Testing Diffusion, Calculating Cost per Bottle and Purchasing Raw Materials Wholesale from CSI?
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 used on this page: Diffuser products — CSI live pricing, pulled 14 October 2026: Pure Performance Base ₹325.00 / 100 g, ₹1,099.00 / 500 ml; Lift Base ₹1,099.00 / 500 ml; Softness Base ₹1,099.00 / 500 ml; Longevity Base ₹1,296.00 / 500 ml; Depth Base ₹1,099.00 / 500 ml; CSI HyperDiffusion Base™ ₹1,499.00 (out of stock, not offered); Fiber Diffuser Reeds (Black) ₹236.00 / 25, ₹400.00 / 50, ₹800.00 / 100, ₹4,000.00 / 500; Fiber Diffuser Reeds (White) ₹265.00 / 25, ₹450.00 / 50, ₹900.00 / 100, ₹4,500.00 / 500; Gold Reed Diffuser Bottle 50 ml ₹826.00 / pack of 10, 120 ml ₹1,062.00 / pack of 10; Silicon Measuring Beaker 100 ml ₹300.00, 250 ml ₹600.00; Candle Making Weighing Scale ₹354.00; CSI Pro Mixer ₹349.00. Oils — CSI live pricing, pulled 24 September 2026, stock re-checked 14 October 2026: Jasmine Fragrance Oil ₹103.00 / 15 g, ₹230.00 / 50 g, ₹430.00 / 100 g, ₹1,961.00 / 500 g, ₹3,923.00 / 1 kg. Catalogue-wide figure used: of 91 oils listing both 100 g and 1 kg, 24 show a 1 kg saving of 5% or more (24 September 2026 pull).
Non-price figures and assumptions: Load convention: fragrance load is a share of the total blend, by weight (oil g = batch g × L; base g = batch g × (1 − L)). Millilitre-to-gram conversions use a labelled example density of 1.00 g per ml with a ±5% sensitivity (0.95–1.05 g per ml); no density is published for any CSI base or oil, so weigh 100 ml of your own blend. Worked example: 120 ml Gold bottle filled to an example 100 ml = 100 g at 1.00 g/ml (95 g–105 g at ±5%); 20% = 20 g oil + 80 g base. Stage 2: 30 g vials at 15/20/25% in Lift and Pure Performance. Stage 3: 9 × 120 ml at 6/8/10 reeds, 3 per arm, leftover Lift used first. Stage 6: 60 × 120 ml, 8 reeds each, 3% cling allowance, base bottles ordered for 0.95 g/ml. Working practices: 5% test allowance, 30-day checkpoint. Labelled examples: 2.0 g/day loss, 8 g residue, label ₹8.00, box ₹45.00, price ₹799.00. CSI publishes no composition, density, viscosity, evaporation rate, flash point or shelf life for any diffuser base, no reed diameter, no bottle neck size or fill line, no diffuser throw, evaporation or longevity data for any base, oil or reed, and no IFRA percentage for any oil. Base-page statements are quoted as claims to test, not as CSI test results; the five bases are distinguished only by what their pages say they are for. Reed diffusers are listed under IFRA Category 10A in current IFRA amendments as commonly summarised in suppliers' IFRA guides — ask CSI on WhatsApp for each oil's IFRA certificate and use the lower of the base page's 30% maximum and the certificate's Category 10A limit. Material costs exclude labour, labels, boxes, freight and GST. Diwali 2026 falls on Sunday 8 November.