How to Write a Manufacturer-Ready Product Brief for Your Cosmetic Product

Goldn

Nov 5, 2026 · 6 min read

A manufacturer-ready product brief is one a contract manufacturer can quote on without sending you a list of questions first. It doesn't need to be long, and you don't need a chemistry degree to write one. You need to say what you want in terms a lab can act on, and to be honest about what you haven't decided yet.

In our last article we looked at why a structured brief gets you better quotes and what a manufacturer needs to know. This one is practical: how to get from your idea to that brief, step by step.

Step 1: Start with one sentence

Before you fill in anything, write your idea down as one sentence, the way you'd explain it to a friend:

"A strong-hold hair gel without silicones or PEGs, in a 150 ml recyclable tube."

That sentence already does a lot of work. It names the product type, the main benefit, two free-from requirements, a size and a packaging direction. Everything in the following steps makes this sentence more precise. If you can't write the sentence yet, you're not ready for a manufacturer, and that's fine: go back to validating your idea first.

Step 2: Say what the product does, not what it is called

"A glow serum" means something different to every lab. Describe the job instead:

Who it's for: skin or hair type, age group, any condition such as sensitive or acne-prone skin.
What it should do: moisturise, add shine, hold a style, protect from UV.
How it should feel: light or rich, fast-absorbing, non-sticky, matte or dewy.
How it's used: daily or occasionally, morning or evening, leave-on or rinse-off.

Leave-on versus rinse-off matters more than most founders expect. It changes which preservatives and actives are allowed and at what concentration.

Step 3: Turn vague words into checkable requirements

This is where most briefs lose weeks. Words like "natural", "clean", "gentle" or "non-toxic" sound clear, but a chemist can't formulate against them. Replace each one with something a lab can check:

"Natural" → a certification, e.g. COSMOS Natural or COSMOS Organic, or a minimum share of ingredients of natural origin.
"Clean" → a free-from list: e.g. no silicones, no PEGs, no sulfates, no fragrance. If you're aiming at a retailer's clean label, name it, because each one has its own list.
"Gentle" → fragrance-free, no essential oils, dermatologically tested.
"Cruelty-free" → Leaping Bunny or another named scheme.
"Vegan" → no animal-derived ingredients; say whether you also want a vegan certification or only the property.

The same goes for claims you want on the pack. "Reduces wrinkles" or "SPF 30" need testing, and some claims can turn your product into a drug in the US. Check where the line is before you promise it to customers.

Step 4: Add the commercial facts

A lab can design a beautiful formula that you can't afford or that they can't fill in your quantity. Four numbers prevent that:

First order quantity, e.g. 3,000 units, plus what you expect to reorder. Compare it with typical minimum order quantities before you send it.
Target retail price or cost per unit. If you only know the retail price, say so; the manufacturer can work backwards. Our budget series shows how to estimate cost of sale.
Target markets, e.g. the EU and the US. Ingredient rules and labelling differ, and some ingredients are banned in one market but not the other.
Launch date. Stability and safety testing take months, so a launch in eight weeks changes what's realistic (see how long it takes to create a new cosmetic product).

Step 5: Decide what you're bringing and what you need

Manufacturers work in different ways. Some only fill, some develop the formula, some also source the packaging. Make clear what you need from them:

Do you have a formula, or do you need one developed?
Who sources the packaging? If you do, name the supplier and component.
Do you need help with testing, safety assessment or regulatory documents?

This tells the manufacturer which of their services to quote, and it helps you compare quotes from labs that offer different things.

Step 6: List what's still open

A manufacturer-ready brief isn't one with every field filled. It's one where the gaps are visible. Add a short section of open questions, for example:

Texture: gel or cream-gel?
Certification: COSMOS Natural or none?
Budget: target cost per unit to be confirmed after the first quote.

Open questions are an invitation for the manufacturer to advise you, and they stop the lab from filling the gaps with its own assumptions.

Two examples

The hair gel. "A strong-hold hair gel without silicones or PEGs, in a 150 ml recyclable tube." After the six steps, the brief adds: for short to medium hair, all-day hold without flaking, leave-on; free from silicones, PEGs and fragrance; first order 2,000 units, target retail price around €15; EU only; the manufacturer sources the tube. Open: how "recyclable" is defined for the tube (mono-material PE or PCR content), and whether a light scent is acceptable after all.

The mineral sunscreen. "A mineral SPF 30 face fluid for daily use, no nano ingredients, EU and US market." Here step 3 does most of the work. SPF 30 needs SPF testing, and in the US a sunscreen is regulated as an over-the-counter drug, which narrows the choice of manufacturers to those who can produce OTC products. "No nano" is checkable, because nano ingredients must be declared on EU labels. Open: tinted or untinted, water resistance yes or no. Our article on making a sunscreen goes deeper.

A quick check before you send it

Read your brief as if you were the manufacturer and ask:

Could I quote on this without writing back?
Is every "natural", "clean" or "gentle" replaced by something I can check?
Do I know the quantity, the markets and roughly what it may cost?
Is it clear what I'm expected to do and what the brand provides?
Are the open questions listed, not hidden?

If you'd answer no to any of these, fix that first. One more round on paper is faster than one more round of emails.

How Goldn helps

Goldn turns your one-sentence idea into a structured product brief. Describe the product in your own words, and Goldn's AI copilot fills in ingredients, things to avoid, certifications, packaging and the core product details. It lists the open questions a manufacturer needs answered, and you check every field before it's saved. Then you share the brief with manufacturers through a secure link, or find one in the Goldn supplier directory.

Describe your idea and create your brief for free.