Screen printing can decorate far more than ordinary T-shirts, but the correct ink depends on the material beneath the screen. Cotton canvas, polyester bags, polypropylene totes, nylon jackets, paper, wood, metal, glass, and plastic all have different surfaces and heat tolerances.

Textile plastisol works well on many fabric-based products, including canvas, but it is not a universal ink for every printable object. Before choosing an ink, identify the material, any surface coating, and the conditions the finished product must withstand.

Canvas Is Still A Fabric

Canvas describes a heavy woven construction rather than one specific fiber. It may be made from cotton, polyester, a cotton/polyester blend, or synthetic material with a water-resistant coating.

This distinction matters because an ink that works well on an untreated cotton tote may not bond to a coated outdoor banner or synthetic equipment bag.

Before printing canvas, determine:

Best Ink For Cotton Canvas

Untreated cotton canvas can usually be printed with the same plastisol used for cotton garments. Our 480 Series is an easy-printing general-purpose option for cotton and poly/cotton materials.

Canvas has a heavier texture than a T-shirt, so it may require a slightly larger ink deposit to produce an even surface. A mesh count that works perfectly on smooth jersey fabric may leave small gaps across a coarse canvas weave.

For canvas totes and similar products:

A second print stroke may improve coverage, but avoid depositing more ink than the material and curing process can handle.

Printing Polyester Canvas And Synthetic Bags

Polyester canvas and synthetic bags can present two additional problems: dye migration and heat sensitivity. High curing temperatures may cause the fabric dye to discolor the ink or may shrink, scorch, or distort the item.

Our ELT Series cures at temperatures as low as 250°F and is formulated for bleed resistance, stretch, and broad fabric compatibility. The lower cure temperature can reduce the risk of heat-related damage.

Do not assume every synthetic bag is ordinary polyester. Some inexpensive reusable bags are polypropylene, while others contain coatings that prevent standard textile ink from bonding properly.

Printing Polypropylene Bags

Polypropylene is commonly used for reusable shopping bags, promotional totes, and lightweight jackets. It can be difficult because it has low surface energy and may also deform under excessive heat.

The ELT Niche Series is specifically designed for polypropylene bags and jackets. It offers low-temperature curing and bleed resistance and can also be used on polyester uniforms and T-shirts.

The standard ELT Series can also print on polypropylene without additives. Even with an appropriate ink, test the actual item because polypropylene products vary in surface treatment, construction, and heat tolerance.

Use the lowest effective cure process and watch for:

Printing Nylon

Untreated nylon can accept certain textile inks, but coated or water-resistant nylon is much more difficult. The coating that repels water may also repel ink.

Our .357 Series can be used on cotton, polyester, poly/cotton, and untreated nylon. It provides strong opacity, flexibility, and bleed resistance.

Before printing nylon, test for:

Do not assume that success on one nylon jacket means the same setup will work on another brand. Coatings and fabric treatments vary widely.

When A Heat Transfer Material May Be Better

Some coated fabrics are more dependable with a transfer product designed for difficult surfaces rather than direct screen printing.

Siser ColorPrint Extra is a printable heat transfer material intended for lightly treated nylon and difficult items such as awnings, canvas, tents, shoes, belts, and canvas bags.

This does not make it the automatic solution for every coated product. The application temperature, pressure, surface shape, and manufacturer instructions still need to be tested. However, it can provide an alternative when direct textile ink will not adhere reliably.

Can You Screen Print Leather?

Natural and synthetic leather can be screen printed, but results depend heavily on the surface finish. Oils, waxes, protective coatings, and flexible topcoats can prevent ordinary textile ink from bonding.

Leather may also be damaged by the temperature needed to cure plastisol. Synthetic leather can shrink, melt, become glossy, or separate into layers.

For leather and leather-like materials:

A specialty leather ink or compatible transfer material may be more suitable than standard textile plastisol.

Paper And Cardboard

Paper, posters, and cardboard are normally printed with water-based or graphics inks made for paper rather than textile plastisol. These inks can air-dry or pass through drying equipment without requiring the paper to reach normal plastisol cure temperatures.

Textile plastisol may be usable for certain artistic projects, but it can leave a heavy surface deposit and require more heat than the paper can tolerate.

For paper products, consider:

Use an ink intended for paper when producing posters, packaging, cards, or other commercial paper goods.

Printing Wood

Screen printing can work well on unfinished or properly prepared wood, but the grain and porosity affect coverage. Rough wood may require sanding, while sealed or painted wood needs an ink compatible with the coating.

Water-based acrylic and graphics inks are common choices because they can bond to porous surfaces without the high curing temperature required by plastisol.

Test for:

Do not apply a clear finish over the print until both products have been tested together. Some coatings can soften or dissolve the ink beneath them.

Metal, Glass, Plastic, And Vinyl

Metal, glass, rigid plastic, and pressure-sensitive vinyl generally require graphics inks formulated for nonporous surfaces. Textile plastisol is not normally the correct choice because it may have poor adhesion and may not withstand scratching, cleaning chemicals, weather, or repeated handling.

The exact ink depends on the substrate. For example, an ink that adheres to aluminum may not bond to polypropylene, acrylic, glass, or powder-coated metal.

When printing a nonporous object, identify:

Do not describe an ink as suitable for “plastic” without identifying the type. Plastics have very different surface properties and temperature limits.

Adjusting The Screen For Rough Materials

Canvas, wood, and other textured surfaces may need more ink than a smooth T-shirt, but more pressure is not always the answer.

A better setup may include:

Excessive pressure can push ink into low areas, distort the screen, and produce blurred edges. Allow the screen and ink deposit to bridge the texture rather than trying to flatten the material with the squeegee.

Account For Seams, Handles, And Uneven Shapes

Many alternative products are harder to print because they do not lie flat. Tote bags may have handles and side seams. Jackets may include zippers and pockets. Boxes, signs, and rigid objects may vary in thickness.

Use a platen or fixture that:

A suitable ink cannot compensate for an unstable or uneven printing surface.

Always Test Adhesion And Heat Tolerance

A successful test should reproduce the complete production process. Print the actual material, cure or dry it as planned, and allow it to cool completely.

Then evaluate:

For bags and flexible products, fold and crease the printed area repeatedly. For hard surfaces, perform a controlled scratch or tape test appropriate for the product.

Testing is particularly important when the material has an unknown coating or when failure would ruin an expensive finished item.

Do Not Call Every Printable Product A Fabric Job

Textile printers sometimes try to use familiar plastisol on every order that reaches the shop. That approach can work on untreated cotton canvas and many synthetic fabrics, but it becomes risky on coated, rigid, or nonporous surfaces.

Use textile ink for materials it was designed to penetrate or bond to. For paper, wood, glass, metal, rigid plastic, and coated products, select a graphics ink or transfer system specifically approved for the substrate.

Final Thoughts

Canvas can usually be screen printed successfully once its fiber and coating are identified. Use the 480 Series for untreated cotton and poly/cotton canvas, consider the ELT Series for heat-sensitive polyester and polypropylene, and use the ELT Niche Series for polypropylene bags and jackets.

For untreated nylon, the .357 Series provides a flexible, bleed-resistant option. Coated nylon and other difficult surfaces may require a specialized transfer material such as Siser ColorPrint Extra.

Beyond fabric, there is no single universal screen printing ink. Identify the exact substrate, choose an ink formulated for it, and test adhesion, heat tolerance, and durability before beginning production.