I Found a Cheaper Wax but It Requires More Wick Testing and Produces More Cosmetic Rejects — How Do I Compare Its Real Cost With My Existing Wax?

Two costs that never appear on the wax quote

You have already noticed the two things that matter. The cheaper wax needs more wick testing before it performs, and it produces more cosmetic rejects — frosted sides, rough tops, wet spots — than the wax you use now. Neither shows up on the supplier's invoice. Both come out of your margin.

So compare the two waxes on one number: the cost of each saleable candle, including the wick testing you had to do to get there and the candles you could not sell. That is a slightly longer sum than price per kilogram, but it is the only one that tells you whether the saving is real.

A note on fairness. The comparison below uses CSI's own wax as the existing, more expensive option. If the arithmetic favours the cheaper wax for you, switch. If it does not, you will at least know why you are paying more.

Setting up the comparison

Suppose your existing wax is Premium Coconut Soy Wax CSI 468, bought in 10 kg packs at ₹6,370.00, which is ₹6,370.00 ÷ 10 = ₹637.00 per kg. The cheaper wax you have found is, for this example, 12% less: ₹637.00 × 0.88 = ₹560.56 per kg (a hypothetical figure; use your real quote).

Use this series' convention of a 200 g candle at 8% load: 184 g wax and 16 g fragrance. Wax per candle is 0.184 × ₹637.00 = ₹117.21 on your existing wax and 0.184 × ₹560.56 = ₹103.14 on the cheaper one — a saving of ₹14.07 per candle. The rest of the candle: 16 g Citrus Lemon at 16 × (₹2,832.00 ÷ 1,000) = ₹45.31, a clear salsa jar at ₹2,950.00 ÷ 100 = ₹29.50, and a thin Eco wick at ₹5.90. Total materials: ₹197.92 per candle on the existing wax and ₹183.85 on the cheaper wax.

Now bring in your two observations, expressed as numbers you can check against your own records:

Where do the reject figures come from? Ideally from your own trial, not from a guess. Pour a full production-sized run of each wax on the same day, in the same jars, with the same oil, pour temperature and cooling spot, then inspect every candle after cure against the same written cosmetic standard. Count rejects and write the reason for each. One run is thin evidence, so treat the first figure as provisional and update it as real production lots come through. If you inspect the two waxes on different days, room temperature alone can move the frosting count enough to mislead you.

The real cost, month by month

Read the two net lines carefully. If the cheaper wax needs one round of wick testing and then stays stable, it still saves you about ₹2,926.50 a month even with four times the reject rate. If every new lot of it needs its own wick ladder, the saving shrinks to ₹720.30 — a figure that one bad batch or a few hours of your time would wipe out.

You can also find the reject rate at which the cheaper wax stops paying. With one-off wick testing, the saving left to absorb rejects is ₹8,442.00 − ₹1,103.10 = ₹7,338.90 a month. Divided by ₹183.85 per rejected candle, that is 39.9 candles, or 6.65% of 600. Above roughly 6.6% more rejects than your existing wax, the cheaper wax loses money.

Why lot-to-lot behaviour decides it

The biggest swing in the table comes from one question: does the cheaper wax need re-wicking every time a new lot arrives, or only once? You cannot answer that from the first bag. You answer it at goods-in, lot after lot.

Give the cheaper wax its own incoming routine for the first few deliveries. Keep about 100 g of the lot you wick-tested as a retained reference — a suggested starting point. When each new lot arrives, quarantine it, compare it with the reference by eye and nose, melt a small sample of each side by side, and make two confirmation candles in your top-selling combination with the approved wick. If the melt pool and surface match, release the lot. If they do not, you are back in the wick-testing row of the table, and you should count that cost against this supplier.

Record cosmetic rejects per lot in the same place: candles made, candles rejected, and the reason. Frosting that appears on every lot is a property of the wax; frosting that appears on one lot is a lot problem worth raising with the supplier. Both are real costs, but they call for different decisions. A written cosmetic standard — photographs of an acceptable top, an acceptable side and a reject — keeps the counting honest when different people inspect different lots.

Making the call, including the uncomfortable options

If three or four lots of the cheaper wax arrive, pass goods-in with your approved wick, and keep rejects well under the break-even rate, switch and bank the saving. If lots keep needing re-wicking or rejects creep towards the break-even line, stay with your existing wax — or keep the cheaper wax for products where appearance matters less.

That last option is often overlooked. Cosmetic rejects matter far less in candles that are coloured, frosted by design or sold in opaque jars. Some makers sensibly use a lower-cost wax for those lines and keep the more expensive one for clear-jar, white-wax products where every surface flaw shows. Run the same true-cost sum per product line and you may find the answer is "both".

Cosmetic seconds can also be sold at a discount rather than scrapped, which recovers part of their cost. If you do that, reduce the reject cost in the table by what the seconds actually fetch — your own figure — rather than assuming they are worth full price. And never sell as seconds a candle whose defect affects safety: a wick that drifts, a flame that soots or a jar that is damaged belongs in the reject bin, not in a sale basket.

Whatever you decide, keep the wicks and formulas for each wax recorded separately. A wick approved on CSI 468 at its stated pour of 58–60°C is not automatically approved on another wax with a different pour behaviour, and mixing the records is how a good saving turns into a production mystery six months later.

Where this page fits

CSI already has guides that cover parts of this question. This page covers the goods-in check for the question above; these go deeper on the rest:

Three things to buy for this job

Frequently asked questions