Quick answer: The laundry chemicals a commercial laundry uses, by name and use, are a main-wash detergent, a specialist detergent for darks, a softener, a collar and cuff pre-spotter, a colour fixative, chlorine bleach, oxygen bleach, carbon and a finishing starch. Each one does a single job at a single stage of the wash, and most problems come from using the right product at the wrong stage or on the wrong fabric.
Laundry chemical names and uses at a glance
Every commercial wash is a sequence: pre-spot, main wash, bleach if needed, rinse, condition, finish. Each laundry chemical belongs to one of those steps. Keep that sequence in mind and the shelf stops looking like nine confusing drums and starts looking like one process. If you also run a dry cleaning machine, the dry cleaning chemicals list covers the other half of the store.
Main-wash detergent
What it does: lifts general soil, sweat and light oils from cotton, polycotton and most blends, and holds that soil in the water until the drain so it does not settle back on the cloth.
When to use it: every standard load. It is the base product; everything else on this list is added to it or applied around it. Dose by load weight and water hardness, as explained in the guide to laundry chemical dosing.
Not for: wool, silk and delicate dark garments, which need the gentler product below. Purolix supplies this as Laundry Detergent.
Specialist detergent for darks and premium garments
What it does: cleans at a lower alkalinity with no optical brighteners, so black and navy garments do not go grey or chalky and premium fabrics keep their hand feel. Many formulations are two-in-one, with a conditioning agent built in.
When to use it: dark cottons, denim, blended suitings, branded garments and anything the customer paid a lot for. It is also the product to reach for when a garment label says gentle or delicate wash.
Not for: heavily soiled whites and kitchen linen, where you need the stronger main-wash product. Purolix lists this as DC Detergent under Wash and Rinse.
Softener
What it does: coats the fibre in the final rinse so towels feel full, shirts iron more easily and synthetics hold less static.
When to use it: towels, bed linen, cotton shirts and customer garments where feel matters. Always in the last rinse, never in the main wash, where it would cancel out the detergent.
Not for: microfibre cloths, sportswear with wicking finishes, and anything that will be starched. Softener on top of starch gives a limp, patchy finish.
Collar and cuff pre-spotter
What it does: breaks the ring of body oil, sweat and dead skin that builds up on collars, cuffs and underarms before the main wash. The main wash alone rarely shifts a set-in collar line.
When to use it: on every shirt that comes in with a visible ring, applied by hand at the sorting table and left to work for a few minutes before the load is built. The full method is in the guide to removing sweat stains from shirt collars.
Not for: silk, wool or dyed fabrics that have not been tested on a hidden seam. Purolix supplies this as Collar & Cuff 500.
Colour fixative
What it does: locks loose dye into the fibre so it does not bleed into the wash water or onto other garments.
When to use it: on new, dark or hand-dyed garments in their first few washes, and on any load where a bleed has already happened once. The guide on fixing colour bleed stains explains when it helps and when it is too late.
Not for: whites, which have no dye to fix, and loads that have already bled, where the fixative would lock the stray dye in place. Purolix lists this as Colour Fix.
Chlorine bleach
What it does: the strongest whitening and sanitising agent on the shelf. It strips colour from stains, kills odour-causing bacteria and restores grey whites.
When to use it: white cotton and polycotton only, in the main wash or a separate bleach bath, at the dose on the product chart and never more.
Not for: anything with colour, anything with elastane or spandex, wool, silk, nylon, or garments with metal trims. Over-dosing yellows polyester and weakens cotton over time. Purolix supplies this simply as Bleach.
Oxygen bleach
What it does: a milder, colour-safe bleach that releases active oxygen in warm water to lift tannin stains, tea, coffee, juice and general greyness without stripping dye.
When to use it: coloured loads, mixed hotel linen, and as the first move on a colour-run accident. It works best in warm water with a longer wash time.
Not for: wool and silk at high temperature, and it is not a sanitiser in the way chlorine bleach is. Purolix lists this as Oxy Bleach.
Carbon
What it does: in the laundry trade, carbon is the alkaline wash booster. Added to the main wash, it raises the wash pH so the detergent can cut heavy grease, soot and oily soil that would otherwise survive the cycle.
When to use it: kitchen uniforms, mechanic overalls, restaurant napkins and any load where the soil is oily rather than just dusty. Hotel laundries use it as a matter of routine on food and beverage linen, as covered in the hotel laundry chemicals list.
Not for: wool, silk, dark delicate garments or anything that would be damaged by high alkalinity. Always rinse thoroughly after a carbon-boosted wash.
Finishing starch
Starch is not a wash chemical but it lives on the same shelf. Applied in the final rinse, or sprayed on the pressing table, it gives cotton shirts, kurtas and table linen a crisp, sharp finish and helps them resist soiling between wears. Use it only on cotton and linen; it does nothing useful on polyester and can leave white marks on darks. Purolix offers both a rinse-stage Starch and a Starch Spray for the press.
Stocking the shelf
A laundry does not need every product on day one. Start with a main-wash detergent, softener, collar and cuff pre-spotter and oxygen bleach, then add chlorine bleach, colour fixative, carbon and the dark-garment detergent as your mix of work demands. All eight wash-stage products are on the Purolix Wash and Rinse page with prices published per litre, GST extra. If you are not sure which products your volume justifies, send us your current shelf through the contact page and we will suggest a starting set.
What is the minimum set of laundry chemicals a small commercial laundry needs?
A main-wash detergent, a softener, a collar and cuff pre-spotter and an oxygen bleach cover most everyday work. Add a chlorine bleach if you handle a lot of white cotton, a colour fixative if you take new or dark garments, and a specialist detergent for darks once the volume justifies it.
Can chlorine bleach and oxygen bleach be used in the same wash?
No. Choose one. Chlorine bleach is for white cotton and polycotton only; oxygen bleach is the colour-safe option. Mixing the two wastes both and can damage the fabric.
Does every laundry chemical go into the same compartment of the machine?
No. Detergent, carbon and bleach go in the main wash; softener and colour fixative go in the final rinse; pre-spotters are applied by hand before the load is built; starch is a separate finishing step. Dosing in the wrong stage is the most common reason a product seems not to work.