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Kaywin is China's leading OEM pen manufacturer — helping 300+ global brands develop, manufacture, and scale custom markers, highlighters, fineliners and art sets from Wenzhou, China.

Kaywin — 8 Product LinesWhether you're sourcing for your own brand or for clients, Kaywin adapts to where you are in the process. Two flexible starting points — same factory, same quality, no minimum commitment to lock you in.
You own the brief. We handle everything from engineering to production. This is what Kaywin has been doing for 20+ years — building other brands' pen products from scratch or from your existing spec.
Own an exclusive SKU. We build your product from scratch — mold, ink formula, and packaging. Your design, your IP, zero leakage.
Apply your clients' brand or your own. Flexible MOQ, fast sampling, and a 200+ SKU catalog to draw from — built for multi-client sourcing.
11 product lines, all available for full OEM customization. Click any category to see available styles, MOQ, and sample products.

The bestselling OEM category for back-to-school and arts retail. Washable & super washable variants.

Office staple with seasonal school volume. Fast-dry, low-bleed formula in 80+ fluorescent shades.

High-margin art retail category. Flexible nylon tip delivers consistent stroke width control.

Precision writing for journaling, technical drawing, and professional annotation.

Industrial-grade markers for labeling, logistics, and office channels. Writes on any surface.

Low-odor erasable formula for education and corporate channels. Easy clean-up.

High-impact visual effect for gift wrap, scrapbooking, and craft retail channels.

High-sparkle effect for DIY craft, kids' art, seasonal gifting, and holiday retail.

Professional-grade opaque markers for canvas, rock art, and specialty art retail.

High-margin multi-SKU sets for back-to-school, seasonal gifting, and gift retail.

Stamp markers, CD markers, correction pens, and unique writing instruments.
11 product lines. All available for full OEM customization with free mold design.
View Full Catalog → Request SamplesMost factories mix colors. We engineer ink behavior. Our humidity-adapted formulas are specifically built for tropical markets like Brazil — preventing drying, leakage and viscosity shifts in 90%+ humidity conditions.
Key for Brazil, SE Asia, ColombiaWe run a standardized 350-meter continuous line test on every ink batch. We share the test report with you — so you can benchmark our products against competitors before placing a bulk order.
Data you can compare, not claimsCustom mold tooling typically costs ¥8,000–30,000 per mold at most factories. At Kaywin, qualifying OEM orders include free mold design — removing the biggest upfront cost barrier for new product development.
Saves ¥8K–30K per moldWe develop every ink formula in our own laboratory, investing 5% of yearly revenue in R&D. This means faster color matching, exclusive formulations that competitors can't copy, and full traceability on every batch.
Exclusive color ownershipMany factories produce pens that are too heavy or leak-prone for air shipping. Kaywin designs products with air-transport viability in mind — important for European brands needing faster restocking without sea freight lead times.
Faster replenishment for EU brandsNo subcontracting. Our factory produces tips, barrels, ink, and packaging in-house — giving you a single point of accountability, faster sampling, and fewer quality control gaps between suppliers.
Zero subcontracting hand-offsShare product idea, target market and estimated volume. We respond within 24h.
Day 1Factory quote, catalog, and physical sample of the closest product dispatched.
Day 3–7Tip, barrel, ink formula and packaging artwork finalized by our in-house team.
Day 7–21Pre-production sample approval, lab testing (EN71/ASTM/REACH) and sign-off.
Day 21–30Mass production at 3.5M/day. Air or sea delivery worldwide with tracking.
Day 30–60
From tip geometry to barrel color — every element is engineered to your specification. We accept your existing molds or design new ones at no cost for qualifying orders.

5% of annual revenue goes into R&D. Every formula is developed and tested in-house — including climate-specific variants for tropical humidity (Brazil, SE Asia) and cold-weather stability (Northern Europe).

In-house packaging design team creates retail-ready brand packaging — from single-pen blister cards to full art set gift boxes. Optimized for your channel: mass retail, e-commerce, or specialty stationery.
20+ QC checks run in our in-house laboratory. Full compliance documentation provided for your target market on request.
We hold ISO 9001 / 14001 / 45001 and carry market-specific certifications for Europe, North America, and international retail audits.

This video takes you through Kaywin's end-to-end OEM manufacturing process — from mold design and ink R&D, through injection molding and barrel assembly, to packaging and QC sign-off. Everything in one factory, under one roof.
From school pencil cases to professional studios and office desks — every application scenario has a purpose-built Kaywin product line behind it. Click through to explore.

Color pens, washable markers, highlighters, and glitter sets for students of all ages. High-volume seasonal ordering with OEM branding support.

Non-toxic, odorless ink with EN71 certification. Mini-tip designs for small hands. Washable formula approved for young children from MOQ 5,000 pcs.

Safe, environmentally friendly non-toxic ink with ultra-strong writing resilience. Whiteboard markers, highlighters, permanent and fineliner pens for B2B office supply channels.

100+ rich color options with pure colors that won't transfer or fade. Specially designed nylon tips give the same effect as a paintbrush — without losing accuracy.
Compliance requirements, seasonal patterns, and ink specs differ by market. Kaywin has sourced for all of them — with region-specific formulas and documentation ready.
EN71 and REACH compliance is non-negotiable for EU buyers. Eco-friendly packaging and consistent batch quality are expected. We supply full EN71-3/9 test documentation and localized artwork for shelf-ready delivery.
Tropical humidity in Brazil and Colombia demands climate-adapted ink chemistry. US buyers require ASTM D-4236 and CA Prop 65 documentation. Strong back-to-school seasonality drives high-volume orders across the region.
Gulf e-commerce buyers demand zero-complaint supply reliability. African buyers need competitive pricing on highlighters and color pens. SE Asian markets combine back-to-school volume with strong art retail growth.
From European supermarket chains to South American school brands — Kaywin OEM pens reach end consumers across every major market.
We've compiled the most common questions from brand owners, distributors and supermarket buyers. Click any question to expand.
✅ Get a free quote & product catalog
✅ Request sample testing
✅ Receive comparison reports

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