Why are low-opacity colors harder to print?

When a design uses low opacity (transparency) — for example 10%, 30%, or 50% — it means the color is not fully solid. On a screen, this can look subtle and visually appealing, but in practice, printing works differently.

The Main Reasons

1. Printing Uses Ink, Not Light

On a screen, transparency is created by letting light pass through or blending pixels.

In printing, a transparent color is translated into less ink being applied in that area.

Less ink results in:

• Lighter, less visible colors
• Small imperfections becoming more noticeable
• Colors appearing more faded than expected

2. White Underbase on Colored Garments

With low opacity, the color is already faint. To achieve accurate colors on colored garments, the printer first applies a white base layer, followed by the colored design.

If your design uses low opacity, the white underbase can show through the color, resulting in a different final appearance than expected.

• For white garments (DTG): no white base layer is applied first
• For DTF printing: a white base layer is always used

In Short

💡 Low opacity = less ink = less visible color → leading to lower and less predictable print quality.

Small Production Variations Become More Visible

Every printing process has minor variations in ink distribution.

With solid colors, these are usually not noticeable. However, with light or transparent colors, this can result in:

• Uneven areas
• A “patchy” or inconsistent look
• Less solid color coverage

The Physical Result Differs from Screen Display

Transparent colors often look different when printed compared to how they appear on screen. This depends on the printing technique, the garment color, and the material used.

Example:

• With DTG, 20% blue on a black T-shirt will appear much less visible than on a white T-shirt
• With DTF, a white underbase is always applied, which can also affect how the final color appears

Recommendation

For the best and most predictable print results, always use fully opaque (100%) colors in your designs whenever possible.

Updated on: 23/06/2026