Store C36 Colour Lab: A Collector’s Guide to Vintage Hair Accessories
When you open a vintage hair accessory case and find a tiny paper tag stamped “C36 Colour Lab”, you have stumbled upon one of the most intriguing classification codes used by mid-century British accessory makers. Unlike the better-known C33 or C34 codes that denote seasonal collections or material batches, the C36 Colour Lab designation points specifically to a colour-matching and dye-lot testing system developed in the 1950s. Understanding this code can transform the way you evaluate, store, and style your vintage finds.
The “Lab” in C36 Colour Lab refers to the in-house colour laboratories that British manufacturers like Maison Archives and smaller ateliers operated from the late 1940s through the 1960s. These labs were responsible for creating stable, light-resistant dyes for acetate, celluloid, and early plastics used in hair combs, barrettes, and decorative slides. The C36 prefix indicates a specific archival run of colour swatches — often numbering between 36 and 48 individual hues — that were produced to calibrate production batches against fading and chemical shift.
What the C36 Code Actually Tells You
The C36 Colour Lab code is not a model number or a date stamp. It is a quality-control marker. When you see it on a tag or impressed into the back of a vintage hair clip, it means that piece was made from a dye lot that passed the lab’s internal testing for colour fastness and uniformity. Collectors today use this code as a shorthand for “high-grade colour stability” — a rare assurance in an era when many synthetic dyes degraded quickly under sunlight or hair oils.
Here is what experienced collectors look for when they encounter a C36-labelled item:
- Dye lot consistency — The colour should appear even across the entire accessory, with no streaking or blotchiness.
- Base material — Most C36 pieces are made from cellulose acetate or casein plastic, materials that respond well to the lab’s controlled dyeing process.
- Surface finish — A smooth, slightly matte texture is typical; high-gloss finishes were usually reserved for non-C36 production runs.
If you are cataloguing your own collection, noting the presence of a C36 mark can add significant provenance value. It tells future buyers that the piece was manufactured under stricter quality protocols than standard commercial accessories of the same period.
How the Colour Lab Process Worked
In a typical C36 Colour Lab workflow, a technician would prepare a master batch of dye solution, then dip small test strips of the base material into the bath at timed intervals. Each strip was labelled with a code — C36-01 through C36-36 or higher — and exposed to artificial sunlight for a set number of hours. Only the strips that showed less than five percent colour shift were approved for full production.
This method explains why C36-labelled accessories often have slightly deeper, more saturated colours than their unmarked counterparts. The lab could afford to use higher concentrations of pigment because they had verified the stability through accelerated aging tests. For the wearer, this meant a vibrant tortoiseshell comb or a deep emerald green slide that stayed true for decades.
Today, when you hold a C36 piece up to the light and see no yellowing or uneven fading, you are seeing the result of that mid-century engineering. It is a quiet detail that separates a well-preserved accessory from one that has lost its original character.
Styling C36 Pieces with a Modern Wardrobe
The colour precision of C36 accessories makes them surprisingly easy to integrate into contemporary outfits. Because the hues are pure and not muddied by age-related discolouration, they read as intentional colour accents rather than faded relics.
Try pairing a C36 deep cherry red barrette with a cream silk blouse and tailored charcoal trousers. The red will hold its own without looking costume-like. For a softer look, a C36 dusty rose comb works beautifully against a navy cashmere jumper — the colour sits in that rare space between vintage and modern that feels current without being trendy.
If you own a piece from the Sadie Bow Headband 4 collection, you may notice that its colour profile aligns closely with the C36 palette. That is because the same colour-lab standards influenced the production of that headband line, ensuring the ribbon dyes matched the plastic bases perfectly.
Care and Storage for Colour-Lab Pieces
Even though C36 dyes were engineered for stability, the base materials — especially cellulose acetate — remain sensitive to heat, humidity, and prolonged light exposure. Here is a practical care routine adapted from the preservation methods used by serious collectors:
- Keep them cool — Store C36 accessories below 22°C (72°F). Avoid attics, window sills, and cars in summer.
- Control humidity — Use silica gel packets in your storage box. Acetate can warp above 60% relative humidity.
- Limit direct light — Even stable dyes will shift over decades if displayed in bright sunlight. Rotate displayed pieces every few months.
- Clean gently — Wipe with a soft, dry cloth. Never use alcohol or acetone — these dissolve the surface of vintage plastics.
For a deeper look at how to build a proper storage environment, our guide on How to Add a CCPA Opt-Out Page to Your Vintage Hair Accessory Blog includes a section on documenting storage conditions for insurance and provenance purposes — a step many collectors overlook.
Identifying Authentic C36 Colour Lab Marks
Not every vintage accessory with a colour code is a genuine C36 piece. Some later reproductions use similar stamps without the lab-testing rigour. Here is a quick reference table to help you distinguish authentic marks:
| Feature | Authentic C36 | Common Reproduction |
|---|---|---|
| Mark location | Embossed on back or inner curve | Painted on surface |
| Font style | Serif, slightly uneven depth | Sans-serif, perfectly uniform |
| Colour of mark | Matches base material or slightly lighter | Often white or gold paint |
| Presence of “Lab” | Always includes “Colour Lab” or “Lab” | May say “Color” or “Colour” alone |
If you find a piece with the full “C36 Colour Lab” embossing, you have a genuine article from the 1950s or early 1960s. Pieces from the later 1960s sometimes use a simplified “C36” stamp without the word “Lab”, but the colour quality remains comparable.
Where C36 Fits in the Broader Collector Landscape
The C36 code sits alongside other archival markers like C33 and C34, but it serves a different purpose. While C33 and C34 denote seasonal shop collections or material types, C36 is purely a colour-quality designation. That makes it especially valuable for collectors who focus on condition and colour preservation rather than just rarity.
When you are browsing a vintage fair or an online auction, a piece with a visible C36 mark often commands a 20 to 30 percent premium among knowledgeable buyers. It is not because the code itself is rare — it appears on thousands of accessories — but because it signals that the piece has likely been stored well and retains its original colour integrity.
For the collector who values honest wear and authentic patina, the C36 mark is a quiet reassurance. It does not promise perfection, but it does promise that what you see today is very close to what the original owner saw when she first pinned it into her hair sixty years ago.