Good Manufacturing Practice sounds like something only big factories worry about — but the habits behind it are simple, practical, and make your products safer, more consistent, and traceable. This is the walk-the-floor version: ingredients off the ground, a COA on every material, a batch record for every batch, and a clever two-step weigh check that works even when it's just you.
If you make soap, lotion, scrubs, or balms to sell, you're a cosmetic manufacturer — even if your "factory" is your kitchen or a corner of the garage. That's not scary; it just means a handful of good habits will keep your products safe, your batches consistent, and your records ready if anyone ever asks. The professional name for those habits is Good Manufacturing Practice, and the world's cosmetic makers organize them under a standard called ISO 22716. Let's translate it into things you actually do on the floor.
ISO 22716 is the international standard for Good Manufacturing Practice (GMP) in cosmetics. It's the agreed-upon set of habits for making personal-care products safely, consistently, and traceably. It covers your space, your ingredients, your people, your production process, and your records — basically, everything that touches a product on its way from raw material to finished jar.
You don't need a lab coat and a clean room to follow its spirit. At its heart, GMP is just making the same good product the same good way every time, and being able to prove it. The big companies document it heavily; a small maker can capture the same protection with a clean workspace, a few smart storage habits, and a good batch record.
This guide is built to help you create good GMP habits inspired by ISO 22716. It is not a certification, an audit, or a substitute for formal ISO 22716 compliance — those are separate, formal processes you'd pursue with a qualified consultant or certifying body. Think of this as the practical, walk-the-floor version: the everyday practices that keep your production safe, consistent, and traceable as you grow.
These habits aren't busywork — each one protects you, your customers, and your business in a concrete way:
Your workspace is the first thing GMP looks at. You don't need a dedicated building — you need a clean, controlled area where product is made.
It seems oddly specific, but glass-breakage control is a classic GMP rule. A bare bulb that shatters over an open pot of soap base means the whole batch is gone — or worse, ships with glass in it. A shatterproof bulb, a cover, or a shielded fixture removes the risk entirely for a few dollars.
How you receive and store your ingredients is where traceability begins. Two habits here do most of the heavy lifting: keep everything off the floor, and get a COA on every material.
A Certificate of Analysis is your supplier's proof that a specific lot of material is what it claims to be and meets spec. It's the document that lets you trust your inputs — and if a customer ever raises a concern, it's the paper trail back to the source. Keep COAs filed by material and lot. (Your suppliers' COAs, SDS, and IFRA docs live in our Document Library.)
Floors are the dirtiest surface in any workspace — they collect dust, moisture, pests, and whatever rolls under a shelf. Storing ingredients directly on the ground risks contamination and damaged packaging, and it's one of the first things any GMP review flags. A simple wire shelf or pallet solves it.
You — and anyone who helps you — are part of the process. Personal hygiene habits keep contamination out of the product.
This is where your formula becomes product — and where good records turn a one-time success into something you can repeat forever. The anchor of GMP production is the batch record: a document for every batch capturing what went in, in what amount, from which lot, made by whom.
You don't have to build a batch record from scratch — our free Batch Record Tool walks you through the pre-production checklist, ingredient traceability (supplier, lot, percentage), the production record, packaging, yield, and a retain-sample log, then saves it as a PDF you keep. It's built to make these GMP habits the easy path.
Once a batch is made, a few final habits close the traceability loop so any finished product can be traced back to its batch — and back to its ingredients.
GMP runs on documentation. The good news: if you've done the habits above, the records mostly create themselves. Keep these organized and findable:
Here's the one GMP habit that trips up small makers. In a big operation, a second person double-checks every ingredient identity and weight. When it's just you, that's impossible — you can't be two people. But you can get the integrity of a double-check on your own, with a simple two-step system.
The trick is time separation. The error you're guarding against is your brain seeing what it expects to see. If you weigh and re-read in the same moment, you'll read it "correct" even when it's wrong. Break the task with time or a different activity, and your eyes reset — so the recheck is genuinely independent. Here's how it works:
Our Batch Record Tool has an Initials column on the production record — use it for your first check, then print the record and hand-write your second initial and time beside each line for the re-verify. The two different times are the whole point: they prove the recheck was a separate event, not a rubber stamp. And if a helper ever is around, have them do the second check — that's the gold-standard true double-check, and your system upgrades to it with no extra setup.
One refinement: flag your highest-risk ingredients — fragrance load, preservative, anything where too much or too little is a safety or performance problem — so those lines always get the most careful second look, even when you're tempted to speed through the inerts.
ISO 22716 is the international standard for Good Manufacturing Practice (GMP) in cosmetics — the agreed-upon habits for making personal-care products like soap, lotion, and balms safely, consistently, and traceably. It covers your workspace, ingredients, people, production process, and records. At its heart it just means making the same good product the same way every time, and being able to prove it.
No. Certification is a separate, formal process and isn't required to sell handmade cosmetics. This guide is about building good GMP habits inspired by the standard, not about certification. That said, U.S. cosmetics do fall under the FDA's MoCRA rules, and these GMP habits map directly onto what those rules expect — so following them keeps you in good shape and ready if your business grows.
Use a time-separated self-check. Weigh each ingredient, confirm the material and lot, record the amount, and initial it with the time. Then break the task — finish other ingredients or step away — and come back to re-verify each line against your written record and the physical containers, adding a second initial and a new time. The gap between the two times resets your eyes so the recheck is genuinely independent, giving you much of the protection of a true two-person double-check.
A Certificate of Analysis (COA) is your supplier's document proving that a specific lot of material is what it claims to be and meets its specification. It lets you trust your inputs and gives you a paper trail back to the source if a customer ever raises a concern. Keep a COA on file for every raw material lot — fragrance, base, colorant, preservative, and additives. Supplier COAs, SDS, and IFRA documents are available in the Master Maker Crafts Document Library.
Both are simple contamination controls. A bare bulb that shatters over an open batch can shower glass into the product, so covered or shatterproof bulbs over the work area remove that risk. Floors are the dirtiest surface in any space — dust, moisture, and pests collect there — so storing ingredients up on shelves, racks, or pallets keeps materials and packaging clean. Both are quick, low-cost fixes that any GMP review will look for.
Keep a batch record for every batch (ingredients, lot numbers, amounts, maker, and yield), COAs and SDS for every raw material lot, cleaning logs, labeled retain samples from each batch, and a simple complaint log with a basic recall procedure. A common rule of thumb is to keep records for about three years, or for the product's shelf life plus a buffer. A tool like the free Batch Record Tool captures most of this automatically as you work.
Whether you want to learn more, get inspired, or stock up on supplies — here's where to go next.
Browse every step-by-step guide we offer, organized by craft.
Tutorial HomeSeasonal makes, trending projects, and fresh ideas from our blog.
Read the BlogFree maker tools for pricing, soap & lye, resin, slime, and batch scaling.
Use the ToolsBases, fragrance, color, and everything for soap and skincare.
Shop Supplies!
