Two Soy Wax Suppliers Give Me Similar Samples — What Tests Should I Run Before Choosing Which Supplier Gets My Regular 100 Kg Orders?

Similar samples settle almost nothing — here is what does

Two suppliers send you a bag each. Both are creamy, both melt cleanly, both make a candle that looks fine on day three. The natural next step is to choose the cheaper one and place the first 100 kg order. That is where most supplier problems begin, because a sample answers a much smaller question than the one you are really asking. A sample tells you that that bag made that candle acceptably. A regular 100 kg supplier has to show three further things: that their wax works in your standard candle as well as or better than your current wax, that the bag you buy behaves like the bag you were given, and that the next delivery behaves like the first.

So the tests come in layers. First a desk check of things that need no wax at all: pack sizes, stock, documents, how quotes and invoices work. Then an identity record of each sample — appearance, smell and a weighed melt-and-pour — so you have something to compare future bags against. Then the real comparison: both samples burned side by side against a control candle made with your current approved wax, with the same oil lot, wick, jar, load and cure. Then a shelf and heat check. Then, for the leader only, a pilot from a pack you have bought, not one that was sent free. Finally a repeat on the supplier's second delivery before the order becomes routine.

None of this is exotic. It is the same discipline any small manufacturer uses before giving a raw-material supplier regular business, scaled to a candle workshop. This page is the hub for the twenty supplier-selection and wax-approval questions in this series: it sets out the whole gate sequence once, priced, and routes each narrower question — a cheaper quote, a look-alike wax, lot numbers, incoming QC, retained samples, delivery records, backup suppliers — to the post that goes deeper.

What a sample can prove, and what it cannot

Before planning any test, sort the questions a supplier decision depends on by whether a sample can answer them at all. The table is the lead argument of this hub: half the decision cannot be made from samples, however many you burn.

Look at the right-hand column of the first three rows and the last: those are the questions where the samples help, provided you test them properly. The four middle rows — the bag you buy, the next delivery, traceability, stock — are about the supplier, not the wax. A supplier who gives you a perfect sample and an inconsistent second delivery is a worse partner than one whose sample is merely good and whose deliveries never move. That is why gates 5 and 6 are not optional extras for cautious people; they are the part of the test that matches the size of the order.

The six gates, in order, with candle counts

Each gate below has a pass condition you set before you start, a candle count, and a reason it sits where it does. The counts are labelled working practice, not a standard — you can increase them, and for a range of many fragrances you will. What you should not do is reorder them: there is no point running a pilot on a supplier who cannot tell you what is in their pack, and no point burning samples you have not first recorded.

The scoring sheet: suppliers against control, then against each other

Score in two steps. Step one is absolute: is each candidate no worse than the control on every safety line — flame height, mushrooming, soot, jar heat at the same point and minute? CSI publishes no numeric flame-height or jar-temperature limit and this page will not invent one; the standard is no worse than your approved control and within your jar supplier's guidance and the candle fire-safety standard you work to (ASTM F2417 is a commonly cited US standard — read it for its own requirements). A candidate that fails a safety line leaves the comparison regardless of price.

Step two compares the survivors on weighted lines. The weights below are an example for a maker who sells mainly scented 200 g jars online; change them to match your business before you see any results. A wholesale maker who ships in May might weight heat and appearance higher; a maker selling in a showroom might weight cold throw higher.

Cost is deliberately not on the sheet. Score performance and supply first, then lay the cost maths beside the scores. If you put price on the same sheet, a cheaper wax can buy back points it lost on burn quality, and that is exactly the trade you want to make consciously, with numbers, rather than hide inside a total. The ₹60-per-kg cheaper supplier post shows how quickly a small reject rate erases a price advantage.

Why two similar samples can still split apart in production

Soy container waxes are made from hydrogenated soybean oil, often with other plant-derived components, and the finished behaviour depends on the blend, the degree of hydrogenation and how the wax is processed and cooled. Two products can look and smell almost the same and still differ in how they melt around a wick, how they hold fragrance oil, how they crystallise during cure and how they react to warm storage. That is general candle-making knowledge, not a measurement of any CSI wax, and it is why appearance is weak evidence — the look-alike wax post takes that argument line by line.

Production adds variables a sample never meets. A 5 kg melt heats and cools differently from a 1 kg melt. A bag that has sat in a warm warehouse may handle differently from a fresh sample. A supplier may source from more than one producer over a year. None of these is a reason to distrust a supplier; they are reasons to keep evidence. CSI does not publish lot numbers, certificates of analysis or change notices, so the evidence has to be yours: a lot label you write on every bag, a retained sample from every delivery, and a delivery record. The lot-number post and the delivery-record post give the templates.

The priced bench kit for comparing two soy waxes

Here is gate 3 priced with CSI's listed, in-stock packs, using CSI 464 and Natural Soy Pearl as the two candidates because they are the two lowest-priced soy waxes per kilo in CSI's list at 10 kg. That is a price reason to test them first, not a claim that either will win. Grams come from CSI's load convention (oil = candle weight × load): each 200 g candle takes 16 g of oil and 184 g of wax. Four candles per candidate need 736 g, or 772.8 g with a 5% pour-loss allowance (a working assumption). The oil serves all twelve candles: 192 g, or 201.6 g with the allowance. Your control wax comes from your own stock.

The oil line is the largest single item, and that is useful to notice: the Sandalwood 2 × 100 g + 1 × 15 g costs ₹1,098.58, more than either wax. The wax bags leave about 227 g spare each, which becomes your retained gate 2 sample. Gate 5 then adds one 5 kg bag of the leader — ₹2,537.00 for CSI 464 or ₹2,124.00 for Natural Soy Pearl — plus about 416 g of oil for a 26-candle run (₹2,197.16 as 4 × 100 g + 2 × 15 g of Sandalwood). Those candles are saleable stock if they pass, so the pilot is mostly inventory, not cost.

What 100 kg a month means in candles and rupees

Your 100 kg regular order is the reason the testing is worth doing, so translate it. At 184 g of wax per 200 g candle, 100 kg is 543.48 candles before losses, or 527.17 after a 3% pour-loss working assumption. Every ₹10 per kg of price difference between suppliers is ₹1,000.00 on each 100 kg order and ₹1.84 per candle. The bench kit at ₹3,235.98 is therefore smaller than a ₹10 per kg difference on a single order — the test is cheap relative to the decision.

*Material cost per candle = 184 g wax at the production-pack rate + 16 g Sandalwood at the 1 kg rate (₹5.03/g) + Eco Thin C1 wick ₹5.90 + White Matte jar ₹70.80; it excludes labour, packaging, freight and GST. Two pack details are worth knowing before you place a regular order. Luxury Soy Wax Chunks is the one case where the biggest bag is not the cheapest per kilo: one 10 kg bag at ₹5,999.00 costs ₹9.00 more than two 5 kg bags at ₹2,995.00. And Natural Soy Pearl is priced at the same ₹424.80 a kilo whether you buy 5, 10 or 50 kg — the bigger bag buys convenience, not a lower rate. Larger quantities from any of these are quoted on WhatsApp; no discount figure is published.

The reject column is the one to stare at. Saving per candle ÷ material cost per candle gives the extra reject rate that cancels the saving, because each rejected candle throws away the full material cost. A ₹30 per kg advantage is erased by roughly 2.2% more rejects — about one extra failed candle in 45. That is why the scoring sheet comes first: until gates 3 to 5 have told you each supplier's reject rate in your own process, the per-kilo price is not yet a cost. Lowest cost per kilo or per saleable candle and the true commercial cost of a soy wax build the full model, rework labour included.

The decision rule: who gets the regular order

Apply the rule below once gate 4 is complete for both candidates, then again after gates 5 and 6 for the leader. It is written so that two people reading the same sheets reach the same answer.

For a maker whose winning candidate is a CSI wax, the concrete purchase sequence looks like this. If CSI 464 wins: the bench kit above, then one 5 kg bag (₹2,537.00) for the pilot, then a first month's order of 10 × 10 kg bags (₹50,740.00) only after the pilot passes, with the second delivery checked before you commit to a standing order. If Natural Soy Pearl wins: one 5 kg bag (₹2,124.00) for the pilot, then 10 × 10 kg bags (₹42,480.00) or, if WhatsApp confirms stock, 2 × 50 kg (₹42,480.00) — the same price per kilo, so choose by storage space and how fast you use an opened bag.

What to keep from the day you choose

When you approve the supplier, open an approval file and keep it with your recipe cards. It should hold the gate 1 written answers, the gate 2 photographs and retained samples, the signed scoring sheets, the pilot batch record and the gate 6 comparison. From then on, every delivery gets its own lot label, a retained sample, an incoming QC line and a delivery record. Those four habits are the subject of the next five posts in this cluster, and each one is cheap: a sealed 250–300 g bag of wax and a few lines in a notebook per delivery.

Which sibling answers your exact supplier question

This page is the hub for posts 5481–5500. Every sibling uses the same control-candle method and the same gate sequence, but each starts from a narrower question. The first half (5482–5490) covers switching, look-alike waxes and the records that make deliveries traceable; the second half (5491–5500) covers qualifying second suppliers, emergency replacements, standard test candles and long-term approval.

The other three clusters in this series answer the questions that sit before and beside supplier choice. Choosing a soy wax for strong hot throw in 200 g jars is the hub for wax properties and qualification tests; surviving a Pune-to-Delhi courier in May leads the Indian heat and shipping cluster; the ₹450/kg wax at 8% versus a cheaper wax at 10% leads the cost-per-candle cluster; and moving from 5 kg packs to 25 kg cartons leads the pack-size and inventory cluster.

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