A dyeing and finishing mill does not run a dye batch for any quantity a customer asks for. Every mill fixes a minimum batch size, called a dye-lot minimum, below which running the batch loses the mill money. Colorline Dyeing, the dyeing and finishing mill this academy follows, fixes its own dye-lot minimum at 300 kilograms. A merchandiser or planner who does not know this number is surprised the first time a small reorder comes back with an unexpected extra charge, or a delivery date that depends on another customer's order arriving at the same time.
This lesson mainly teaches how money and time move: a below-minimum order changes what the mill charges and when the goods are ready, so this is a money and a decision skill together. Without it, a planner quotes a customer a price and a date that assume every order is treated the same, then has to explain later why a small reorder cost more, or took longer, than the last large one.
You need: a basic idea of what a dye lot is, a batch of fabric dyed together in one vat. No previous lesson in this course is required to follow this one.
By the end of this lesson you can:
Not covered here: how to choose a dye class for a given fibre (lesson 4.2.5), and how batch dyeing itself works (lesson 4.2.3).
| Term | Meaning |
|---|---|
| Dye lot | One batch of fabric dyed together in the same vat, which can differ slightly in shade from another batch of the same colour. |
| Dye-lot minimum | The smallest quantity of fabric a mill will run as one dye batch; below this, running the batch is not cost-efficient for the mill. |
| Minimum-charge premium | The extra amount a mill charges to run a batch below its own dye-lot minimum, charging as if it were the full minimum quantity. |
| Combined dye lot | Two or more compatible orders dyed together in one batch to reach a mill's dye-lot minimum, sharing the batch and its cost. |
| Hybrid production model | A company that runs Make to Order and Make to Stock lines side by side, usually split by customer, product line or channel. |
Colorline Dyeing, like most dyeing and finishing mills, fixes a dye-lot minimum: the smallest quantity of fabric it will run as one dye batch. Colorline Dyeing's own dye-lot minimum is fixed at 300 kilograms. Running a dye vat costs the mill roughly the same in water, chemicals, energy and machine time whether the vat is full or half full, so a batch far below the minimum is not cost-efficient for the mill to run at its normal price. An order below the minimum has two standard options: pay a minimum-charge premium, where the mill runs the small batch anyway but charges as if the order were the full minimum quantity, or combine the order with another compatible order in the same dye lot, sharing the batch and its cost with another customer's fabric of the same colour and a compatible fibre.
| What can differ | The shapes you will meet | Why it matters to you |
|---|---|---|
| At or above the minimum | The order runs as its own dye lot at standard cost; a large order such as Order A's own 3,075 kilogram fabric requirement sits well above Colorline Dyeing's 300 kilogram minimum. | No premium and no waiting for another order — the most straightforward case. |
| Below the minimum, paying the premium | The mill runs the small batch anyway, charging as if the order were the full 300 kilogram minimum. | The customer pays for capacity it did not fully use, in exchange for the batch running now. |
| Below the minimum, combining lots | The order is combined with another compatible order to reach the minimum together, sharing the cost. | Cheaper per kilogram, but only possible if a compatible order exists at the right time. |
| Compatibility for combining | Two orders can only share a dye lot if they need the same colour and a compatible fibre; a cotton order and a polyester order cannot share a lot even if both are small. | Assuming any two small orders can combine is the trap this lesson warns against. |
Delta Garments does not only sew confirmed export orders like Order A. It also runs a hybrid production model: part of its capacity fills confirmed orders, and part restocks its own domestic customer, Cedar & Co., under a Make to Stock arrangement paid on 60-day open account. Cedar & Co. has just reordered a small quantity of the same cotton fabric to restock one of its 12 shops. Delta Garments needs Colorline Dyeing to dye 150 kilograms of fabric for this reorder — well below Colorline Dyeing's 300 kilogram dye-lot minimum — so Delta Garments' planner must decide whether to pay the minimum-charge premium or wait to combine this fabric with another compatible order already in Colorline Dyeing's queue.
The worked numberThe reorder sits exactly at half of the mill's own minimum. That is the 150 kilogram shortfall Delta Garments must resolve one of two ways: pay the minimum-charge premium so the mill treats the reorder as if it were the full 300 kilograms, or wait for another 150 kilogram (or larger) compatible order to combine with.
A common mistake is assuming a small order can simply be combined with any other small order in the queue, regardless of colour or fibre. Combining a dye lot requires both a compatible colour and a compatible fibre chemistry; a cotton order and a polyester order cannot share a lot even if both are small enough to need combining. A planner who tries to combine mismatched orders wastes time chasing a combination that cannot actually proceed, and often ends up paying the minimum-charge premium anyway, later than if the premium had been chosen from the start.
This trap costs more than the wasted time itself. A planner who spends days looking for a matching order, only to find none exists, has also used up days that could have gone toward simply paying the premium and shipping the goods on schedule. The safest habit is to check colour and fibre compatibility first, before spending any time searching the mill's queue for a partner order, so a doomed search is never mistaken for genuine progress toward a cheaper outcome.
A dyeing mill will only run a colour batch of a certain minimum size, because running any batch costs about the same whether it is full or not. Colorline Dyeing's own smallest batch size is 300 kilograms. An order below that either pays extra, so the mill runs it straight away, or waits to be joined with another order needing the same colour and a similar kind of fabric, so the two share the cost. Two small orders can only be joined this way if they need the same colour and a matching kind of fabric; a cotton order and a man-made-fibre order cannot be joined even if both are small. Delta Garments faces exactly this choice for a small domestic reorder: pay more and get it done now, or wait for a matching order and pay less.
> Planner's note to the merchandiser: "Cedar & Co. needs this reorder on the shop rack by the end of next week. Colorline Dyeing has nothing else in this colour or fibre queued right now. Do we pay the premium or wait."
You are Delta Garments' planner. Should Delta Garments pay the minimum-charge premium or wait to combine the dye lot? Decide before you open the answer.
Delta Garments should pay the minimum-charge premium. Two facts decide this together.
First, the deadline. Cedar & Co. needs the reorder on its shop rack within the week, and no compatible order is currently queued at Colorline Dyeing to combine with. Waiting for a matching order to appear risks missing that date entirely.
Second, the cost of waiting is uncertain, while the cost of missing the date is not. No one can say when a compatible cotton, same-colour order will next appear in Colorline Dyeing's queue — it could be days or it could be weeks. A missed restock date costs Cedar & Co. lost sales on its own shop floor, a cost likely larger than the minimum-charge premium itself.
Paying the premium costs more per kilogram than a full 300 kilogram batch would have cost, but it gets the 150 kilograms dyed and delivered inside Cedar & Co.'s own deadline. If Delta Garments had more lead time, or if a compatible order were already queued, combining would have been the cheaper choice.
Colorline Dyeing does not publish one fixed minimum-charge premium percentage, so this lesson does not invent one; the trade-off is real even without a fixed number attached to it.
Paying the premium means Delta Garments pays for capacity equal to the full 300 kilogram minimum while only using half of it — the 150 kilogram shortfall is what the premium effectively covers. Waiting to combine instead risks the entire 150 kilograms missing Cedar & Co.'s own restock deadline if no compatible order appears in time, a cost to Cedar & Co.'s own sales that this lesson does not put a number on, but that a planner should weigh against the premium's own real, if unstated, cost.
Open the dye class selector workbook linked at the top of this lesson. Its Decide sheet already carries the fibre-type and order-size questions from earlier lessons in this course; use the same sheet to record your own order's quantity against your mill's fixed minimum, and note which of the two options you chose and why.
| Question | Delta Garments' reorder (filled in) | Your order |
|---|---|---|
| Fabric quantity needing dyeing | 150 kg | |
| Mill's own dye-lot minimum | 300 kg (Colorline Dyeing) | |
| Compatible order currently queued? | No | |
| Option chosen | Pay the minimum-charge premium |
1. What is Colorline Dyeing's own fixed dye-lot minimum?
2. What are the two standard options for an order below a mill's dye-lot minimum?
3. A factory has a 200 kilogram order of polyester fabric to dye, and the mill's own dye-lot minimum is 500 kilograms. A 350 kilogram cotton order is already queued at the same mill. Can the factory combine its polyester order with the queued cotton order to reach the minimum?
| EN | AR | FR | TR | Meaning |
|---|---|---|---|---|
| Dye lot | دفعة الصباغة | Lot de teinture | Boya partisi | One batch of fabric dyed together in the same vat, which can differ slightly in shade or hand-feel from another batch of the same colour. |
| Dye-lot minimum | الحد الأدنى لدفعة الصباغة | Minimum de lot de teinture | Boya partisi minimumu | The smallest quantity of fabric a mill will run as one dye batch; below this, running the batch is not cost-efficient for the mill. |
| Minimum-charge premium | رسم إضافي لعدم بلوغ الحد الأدنى | Supplément pour lot inférieur au minimum | Minimum altı parti ek ücreti | The extra amount a mill charges to run a batch below its own dye-lot minimum, charging as if it were the full minimum quantity. |
| Combined dye lot | دفعة صباغة مشتركة | Lot de teinture combiné | Birleştirilmiş boya partisi | Two or more compatible orders dyed together in one batch to reach a mill's dye-lot minimum, sharing the cost. |
| Hybrid production model | نموذج إنتاج مختلط | Modèle de production hybride | Hibrit üretim modeli | A company that runs Make to Order and Make to Stock lines side by side, usually split by customer, product line or channel. |
You now know what a dye-lot minimum is and the two options for a below-minimum order. The next lesson brings dye classes, dyeing methods and order size together into one decision, using this course's own workbook. Back to the course map