I Have 1 Kg of Soy Wax and 100 g of Fragrance Oil — How Many Useful Test Candles Can I Make While Still Leaving Enough Material to Correct Mistakes?

Which runs out first: the 9.09% break-even

Start with the ratio, because it decides everything else. You hold 100 g of oil for every 1,000 g of wax — a ratio of 0.1. A fragrance load expressed as a share of the finished candle consumes wax and oil in the ratio (100 − L) to L, so the load that consumes exactly your ratio is L = 0.1 ÷ 1.1 = 9.09%. That single number sorts every plan you might make into two kinds.

Under 9.09%, you are wax-limited: you will finish the kilo with oil left in the bottle, which is a comfortable place to be, because leftover oil is a top-up for the next batch and leftover wax is not scentable without buying more oil. Over 9.09% you are oil-limited: the bottle empties first and the wax that remains is stranded. At 10% that stranded amount is 100 g; at 13% — the ceiling Luxury Soy Wax Chunks states — it is 330.8 g, a third of your wax, with nothing to put in it.

Yield by jar size, with the spare grams

Now fix the load at 8% — below the break-even, below every ceiling in the range, and the load this series starts every test at — and the only remaining question is vessel size. This is the decision that determines how much you learn, because a test's value scales with the number of independent jars in it, not with the amount of wax it consumes.

Six now, three later: the reserve split

Here is the part of the question most guides ignore. "How many can I make" has an arithmetic answer — nine. "How many should I pour" has a different answer, because a test you cannot follow up is only half a test. This series uses a two-thirds now, one-third reserve split as a planning assumption, and at 120 g it lands almost perfectly: six jars in round one, three in round two.

Why a third rather than a half? Because at 120 g a third of your materials is almost exactly three jars, which is the smallest round that can carry a repeat: two jars of the change plus one spare. A half-and-half split gives you four and four, which is a fine plan if you would rather test two wick sizes properly in round two — the principle is that the reserve must be big enough to run a real round two, not just to top up a sinkhole. And if you are about to argue that you would rather pour all nine and order more materials if needed, price the wait: a second round in three weeks' time is a second cure cycle, a different room temperature and a result you cannot compare with the first.

What one mistake costs in grams

Reserve planning is easier to take seriously once you price a mistake in the currency that is actually scarce: grams. You do not have money problems at this stage — you have 1,000 g and 100 g, and every error is denominated in them.

The two rows to sit with are the last two. A 3–5% wastage allowance — this series' planning assumption for what stays in the pot — quietly removes 30 to 50 g from your kilo before you pour anything, which is most of the 6.4 g of headroom the nine-jar plan leaves you. Plan on eight or nine jars rather than a certain nine. And judging too early costs a full jar plus the time, which is why the cure discipline matters more than any material choice at this stage. A failed candle can often be re-melted, incidentally, though the cure clock restarts: see can I re-melt a failed candle and start over.

Five ways the kilo gets wasted

Every one of these is common, and none of them looks like waste at the time. They are ranked by how many grams they typically destroy.

One: pouring everything in a single session. Nine jars poured on the same afternoon share every process error — a mis-set thermometer, an over-hot pour, a cold room. Two sessions with a reserve split that risk in half. Two: changing two variables between rounds. New wick and a new load in round two means round two cannot explain round one, and you have spent 331.2 g learning nothing reproducible. Three: raising the load to chase throw. At 10% you get eight jars instead of nine and strand 136 g of wax; the melt pool and the cure usually matter more than the last two per cent anyway, as set out in how to make candles smell strong without exceeding the safe fragrance load.

Four: splitting the oil across two scents. Fifty grams each sounds efficient and means neither scent gets a replicated test — at 8% a 50 g portion is only about four 120 g jars, which cannot cover two wick sizes with a spare. Five: pouring into whatever jars are to hand. Mixed vessels make the wick result unreadable, because the jar's width is what the flame has to melt. If you only have three of one jar and four of another, run them as two separate small tests and say so in your notes rather than pretending they are one batch of seven.

What to buy when the reserve is gone

When both rounds are burned, your kilo is spent and you are in a much better position than you were: you know a wick size, a load, two temperatures and a cure window for one vessel and one scent. The next order should be narrow, and it should be sized by the same arithmetic in reverse — decide how many candles you want, multiply, and then check the pack ladder.

If the recipe passed, buy the wax you tested, in the pack that matches your candle plan, and the oil in the next size up rather than a new scent. Luxury Soy Wax Chunks are ₹599 a kilo at 1 kg and ₹2,995 at 5 kg — the same ₹599 per kilo, so there is no penalty for buying only what you need and no reward for over-buying. Sandalwood Fragrance Oil steps from ₹502.68 at 100 g to ₹2,513.40 at 500 g — the same ₹5,026.80 a kilo either way — and 1 kg is the largest fragrance pack CSI lists, so anything beyond that is a WhatsApp quote rather than a listed price.

If the recipe did not pass, buy the single cheapest thing that tests your next hypothesis. A wick size is ₹5.90 to ₹12. Five hundred grams of the same wax is ₹299. A different 100 g oil is a few hundred rupees. What you should not buy is a 5 kg bag of a wax that has failed twice, or three new scents to cheer yourself up. One kilo has just bought you a specific question; spend the next order answering it. And if you want the pack arithmetic for the batch after that, it is worked through in how much wax one candle actually needs.

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