8 Cotton Duck Canvas Fabric – Natural | Heavyweight 18oz Duck Cloth
Our 8 cotton duck canvas fabric in Natural is an ultra-heavyweight 18oz cotton duck cloth made from undyed, unbleached 100% cotton. Engineered for demanding industrial, utility, artistic, and outdoor applications, this heavyweight canvas features a rugged plain weave double-filled construction that delivers exceptional durability, structure, abrasion resistance, and long-term performance.
The Natural color showcases the raw authentic beauty of cotton canvas with warm organic tones and subtle natural flecking that comes from leaving the fabric undyed and unbleached. This heavyweight canvas is ideal for floor cloths, heavy tote bags, duffle bags, director’s chairs, industrial covers, artist projects, upholstery, wall coverings, utility gear, and rugged sewn products.
Often referred to as chair duck or duffle bag canvas, 8 duck is one of the heaviest numbered cotton duck fabrics available. It provides substantially more body and structure than lighter 10 or 12 duck fabrics, making it ideal for applications requiring rugged durability and a strong structured feel.
Natural cotton duck remains one of the most popular canvas choices for artists, makers, upholstery shops, floor cloth creators, outdoor brands, rustic interiors, minimalist design, eco-conscious products, and DIY projects. Because the fabric is left undyed and unbleached, it also works exceptionally well for custom dyeing, painting, printing, waxing, and creative finishing applications.
Need FR treatment? This fabric can be treated for fire retardancy (FR) upon request for qualifying industrial, commercial, theatrical, or specialty applications. Minimums and lead times may apply.
Not sure if 8 duck canvas is right for your project? Browse our Cotton Duck Fabric collection, explore our cut & sew manufacturing services, or order a fabric sample here.
Key Features
- 8 cotton duck canvas — ultra-heavyweight 18oz duck cloth
- Undyed & unbleached cotton — authentic natural canvas appearance
- 100% cotton construction — durable natural fiber canvas
- Plain weave double-filled construction — dense and abrasion-resistant
- Chair duck & duffle bag weight — ideal for heavy-duty sewn products
- Excellent for dyeing & painting — ideal for custom finishing projects
- Light DWR finish — helps resist minor stains and dirt
- FR treatment available — fire retardant treatment available upon request
- Sold by the yard or roll — ideal for production and manufacturing
Project Ideas
- Floor cloths, painted canvas rugs, and heavy art surfaces
- Duffle bags, heavy tote bags, and utility gear
- Director’s chair seat and back replacements
- Industrial covers, tarps, and workshop applications
- Custom dyed, waxed, or painted canvas projects
- Rustic upholstery, wall coverings, and minimalist décor
- Tool bags, aprons, and handmade artisan goods
Specifications / Information
| Category | Double Filled Numbered Duck, Cotton Duck Fabric, Heavyweight Canvas |
| Color | Natural (Undyed & Unbleached) |
| Fabric Content | 100% Cotton |
| Duck Number | 8 Cotton Duck |
| Fabric Width | 60″ — 1 Linear Yard = Approx. 60″ x 36″ |
| Weight | 18oz per Square Yard |
| Hand | Medium / Heavy |
| Weave Construction | Plain Weave Double Filled |
| Finish | Light DWR Finish for Stain Resistance (Not Waterproof) |
| Shrinkage | Approx. 10-15% |
| Roll Size | Maximum of 50 Yards Continuous |
| Fire Retardant | Not fire retardant as stocked — FR treatment available upon request |
| Care Instructions | To minimize shrinking, machine wash in cold water and tumble dry without heat or air dry. Avoid bleach. Heavy canvases soften and gain character after laundering. |
| Testing | Fabric should be tested for your specific requirements prior to cutting. No claims are allowed on processed goods. |
| Ordering | Please order enough fabric to complete your project. Natural cotton canvas may vary slightly in tone and flecking from lot to lot. |
* Because this fabric is undyed and unbleached, slight natural variations, cotton flecking, and shade differences are considered normal and part of the authentic character of natural cotton canvas. We recommend ordering a sample swatch before large production runs.
