My Candle Works in Pune but Behaves Differently When Customers Receive It in Hotter Indian Cities — Should Climate Testing Be Part of My Formulation Process?

What happens to a candle after it leaves Pune

Pune is, broadly, milder than many Indian plains and coastal cities for much of the year, and most makers test in the most comfortable room they have. Neither is a problem; both are a sample of one. After dispatch, a candle meets four things your workshop may not have shown it. Transit: days in a vehicle and a sorting hub (CSI dispatches from Pune and does not publish transit conditions; your courier's may differ). Storage heat: a shelf in a non-AC room in May, possibly for weeks. Cycling: an air-conditioned bedroom at night and a hot room by day, which is the pattern commonly behind sweating reports. Humidity: months of damp air in coastal cities and in the monsoon everywhere.

Each of these has a typical symptom, as a tendency, not a certainty. Heat and cycling are commonly linked to sweating and a softer surface; sudden temperature changes to wet spots; a warm room to a deeper pool and a hotter jar during the burn. What customers report is also shaped by what they notice: a customer in a humid city may notice an oily film sooner than one in a dry city, and a customer who burns in a hot room may notice a stronger throw or a faster burn. None of that means the formula is wrong for everyone; it means you have not yet tested the conditions it is sold into.

Three sibling posts own the other parts of this problem, and this page links rather than repeats them. Whether a sweat started in transit is the base-versus-shipped split and mock shipment; signing a candle off for summer shipping is the summer release sheet; and the AC-room versus warm-room burn protocol is the two-room burn. This page decides which tests each destination needs, and how to read real customers by region.

The climate-band matrix

Group destinations into three broad bands. These are descriptions for planning, not climate data: assign your own cities from your own experience and public weather records, and let one city sit in two bands in different months if that is how it behaves. Example regions are there only to make the bands recognisable.

Two points about the matrix. First, schedule band tests for the band's hard months, not yours: a warm hold run in December in Pune tells you little about May in a hot-dry city, so run it in your own hottest weeks, and run the humid check in the monsoon. Your year contains rough versions of most bands if you time the tests. Second, every test is the reader's own worked example: the "warm spot" is the warmest indoor place you store stock, measured with your own thermometer. CSI publishes no storage, transit or room-temperature limits, and we will not invent one; a car boot, a sunny window or the top of an appliance is not a test condition we recommend. For the detailed home cycling protocol, use the cycling post.

The eight-candle band plan

The worked example: 120 g candles in the Amber Shiny Glass Jar with Black Lid (page: "Capacity: 120 gm"; confirm with a weighed test pour to your fill line), Eucalyptus Spearmint at 8% of total weight (9.6 g of oil and 110.4 g of wax per candle) in Luxury Soy Wax Chunks, on the wick that already passed a burn-down in this jar (C1 in the example). All eight from one pot.

Worked-example costs exclude labour, freight, packaging and GST. From nothing, the outlay is ₹1,484.00. The Chunks page states no pour or add temperature in the text we captured, and the Amber Shiny page states no heat or hot-pour rating, so confirm the wax figure with us and pour conservatively within it; never judge glass heat by touch at any stage.

Region-tagged customer feedback

Home tests show what can fail. Customers show where it does. The only extra work is to attach the same few fields to every order and every complaint, so you can sort them later. Keep it in one sheet; a message thread is not a dataset.

The last row is the one most makers skip. Without every order tagged, a band that simply buys more will look like a band with more problems. Count reports per band as a share of orders per band, month by month; CSI has no complaint statistics of its own to offer you, and in our judgement a few months of your own tagged rows are worth more than any general figure. If the reports are about scent strength rather than stability, normalising them is its own method (too strong, too weak and perfect).

From band results to a decision

One decision deserves emphasis because it is free and underused: timing. If a design passes everywhere except one band in its hottest weeks, it may be cheaper to schedule that band's dispatches around those weeks than to reformulate the whole range. Whether one formula can cover all your seasons at home is the year-round formula post.

Hot-city purchases to skip

We sell the wax, jars and oils in this plan. We would still rather you ran eight candles and changed nothing than bought a new wax on the strength of three complaints from one city in May.

What the band plan needs

Four items: the worked-example wax, the jar, the oil and the wick. Chosen on page statements, price per unit and stock on 26 September 2026; CSI publishes no climate, transit or stability data, so nothing here is ranked on performance, and the band plan works with whatever you already make.

Frequently asked questions