In Part 1 of this series, we sent our own thermal paper to an independent lab and published what came back. The response from artists was not what we expected. It wasn't "cool." It was: wait, how do I check anybody else's?
Fair question. The tattoo supply industry runs on claims printed on boxes. "Premium." "Professional grade." "Safe." None of those words mean anything. They're not defined by any standard, they're not audited by anyone, and nobody has to back them up. The only thing that means anything is a document. Most artists have never been shown one, let alone taught how to read it.
So here's the whole thing, in plain English. By the end of this you'll be able to open any supplier's paperwork and know in about ninety seconds whether it's real.
What a Certificate of Compliance actually is
A Certificate of Compliance (COC) is a document stating that a specific product was tested against a specific standard, by a specific party, on a specific date, and what the results were.
That's it. It is not a seal of approval. It is not a government license. It is not a health claim. It's a receipt. It says: we ran these tests, here's what we found.
The value isn't the certificate itself. It's that a certificate is falsifiable. A marketing word can't be wrong. A test result can. That's why a company that has one will show it to you, and a company that doesn't will change the subject.
Here's ours, so you have something real to look at while you read the rest of this.
The four things to check on any COC
1. Who ran the test
The single biggest split in this industry is between self-declared and third-party verified. Self-declared means the manufacturer tested its own product and wrote its own certificate. That's not automatically dishonest, but it's a company grading its own homework.
Third-party verified means an accredited independent lab (SGS, Intertek, Bureau Veritas, TÜV and similar) ran the tests and put its own name and report number on the result. Look for the lab's name, an accreditation reference, and a report number you could theoretically call and verify. If the only name on the document is the brand's own name, you're reading a self-declaration.
2. What standard it was tested against
A COC should name the regulation or standard by its actual designation. Not "international safety standards," but something like Regulation (EC) No 1907/2006 for REACH, or Directive 2011/65/EU and (EU) 2015/863 for RoHS. Vague standard names are the most common tell in a weak document. If it won't tell you what it was measured against, the measurement doesn't mean much.
3. What was actually screened, and what wasn't
This is the part almost nobody checks. A test report lists the specific substances screened and the detection limit for each. A document that says "passed all tests" without listing what was tested is telling you nothing.
Read the analyte list. Look for the heavy metals (lead, cadmium, mercury, hexavalent chromium), the phthalate group, and whatever else is relevant to the material. Then look at the results column. You want not detected, or a result below the stated limit, with the limit printed next to it.
Count matters too. Ours states the number screened: 253 Substances of Very High Concern, plus one flagged as a potential future addition to the list. A number you can count beats a sentence you can't.
4. What it covers, and when
A COC applies to a product, a material, and usually a production window or lot. A certificate from six years ago for a formulation that's since changed is decorative. Check the issue date, the product description, and whether it matches the item actually in your hand.
REACH SVHC, without the legalese
REACH is the European Union's chemical regulation. Inside it there's a list called Substances of Very High Concern, or SVHC, which currently runs to well over two hundred entries and grows a couple of times a year. These are substances flagged by European regulators for properties like carcinogenicity, mutagenicity, reproductive toxicity, or persistence in the environment.
"REACH SVHC Screened" means the product was tested against that candidate list. It's one of the broadest chemical screens in common commercial use, which is exactly why it's a useful benchmark for something that sits on skin. What it does not mean is that a product is medical-grade, approved for any health purpose, or endorsed by a regulator. It means it was screened against a defined list, and the report says what turned up.
RoHS, without the legalese
RoHS (Restriction of Hazardous Substances) started life as an electronics rule and has become a general-purpose material benchmark. It restricts a short, specific set of substances: lead, mercury, cadmium, hexavalent chromium, two brominated flame retardants (PBB and PBDE), and four phthalates added in a later amendment (DEHP, BBP, DBP and DIBP).
Short list, hard limits, easy to verify. That's what makes it useful. "RoHS Compliant" on a document backed by an accredited lab report means those specific substances were measured and came in under the restriction thresholds. On the certificate above, that's the right-hand column, item by item.
Words that sound like documentation but aren't
Some phrasing appears constantly on supply packaging and carries no verifiable meaning:
- "Chemical-free": everything is a chemical. Paper is a chemical. This phrase is meaningless by definition.
- "Non-toxic": undefined outside of a few narrow contexts, and rarely tied to a test method.
- "Lab tested": by whom, against what, with what result? Without those three answers it's a sentence, not data.
- "Meets international standards": which ones? Name them or it's filler.
- "Certified safe": no body certifies stencil paper as safe. If a brand says this, it's marketing language, not a regulatory status.
None of this means a product without a COC is bad. Plenty of good material has never been through an accredited lab, because testing costs real money and most suppliers don't want to spend it. It means you're taking the brand's word for it, and you should know when you're doing that.
What ours says
Electrum Gold Standard Thermal Transfer Paper is SGS Tested, REACH SVHC Screened, and RoHS Compliant, with No Detectable Heavy Metals and No Detectable Restricted Phthalates in the screened analytes.
You don't have to take that from a product page. The Certificate of Compliance is published here as a PDF. Open it and run the four checks above on it. Lab name, standards cited, analyte list with detection limits, date and product scope. That's the point of publishing it. A document you can audit is worth more than an adjective you can't.
The same thinking runs through the rest of the stencil line, including ECO STENCIL Printer Ink and Gold Standard Stencil Primer, because the paper, the ink and the primer all end up on the same piece of skin for the same eight hours.
FAQ
Is a Certificate of Compliance the same as a Safety Data Sheet?
No. An SDS covers handling, storage, first aid and hazard communication for a material. It's a workplace safety document. A COC reports test results against a standard. Most serious suppliers can produce both, and they answer different questions.
Does a COC mean a product is approved by the FDA or any regulator?
No. Neither REACH nor RoHS is an approval or an endorsement. Both are restriction frameworks. A compliant result means the tested substances fell within defined limits, nothing more and nothing less.
How do I ask a supplier for one without sounding like a pain?
"Can you send me the third-party test report for this?" That's the whole ask. It's a routine request in every other industry that puts material against skin. A supplier who has one will email it in an hour. A supplier who doesn't will tell you it isn't necessary.
Do REACH and RoHS matter if I'm not in Europe?
They're not legally binding on a shop in Ohio. They matter because they're among the most rigorous and clearly defined material screens available, which makes them a usable yardstick anywhere. There's no equivalent US restriction list written for tattoo stencil paper, so the EU frameworks are what's on the table.
How often should a COC be refreshed?
Any time the formulation, the material source or the manufacturing site changes. Periodically regardless, too, since the SVHC candidate list itself keeps growing. A certificate should be a living document, not a trophy from 2019.
The short version
You put paper against a client's skin every day you work. You're allowed to know what's in it. Ask for the document, read the four things, and decide for yourself, on every brand you buy, ours included.
