How to print high-definition finished products

Guide to Improving UV/DTF Printing Clarity - File Formats and DPI Settings

Applicable Scenarios

This guide applies if you encounter any of the following issues:

Printed results appear blurry, jagged, or grainy
You are unsure about the correct pixel or DPI requirements for your print size

Tip: Verifying that your file meets the recommended DPI and pixel requirements before printing can prevent the majority of clarity-related issues.

File Upload and Format Requirements

Supported File Formats

The editor supports the following file formats: PNG, JPEG, WEBP, SVG, AI, PSD, and PDF.

SVG Vector File Support

The editor supports uploading and basic editing of SVG files. When printing, SVG vector elements are automatically parsed and printed in high definition.

Advantages

No need to calculate DPI manually
Vector graphics can be scaled without loss of detail or clarity

DPI Explanation

What Is DPI?

DPI (Dots Per Inch) indicates how many printed dots appear within one inch and directly affects print sharpness and detail.

Recommended DPI Settings

Printing Scene	Recommended DPI	Description
Standard products	300 DPI	Suitable for most applications such as phone cases, apparel, and A4-sized prints
Small or detailed products	400-600 DPI	Recommended for stickers, badges, and other small-format items

DPI Conversion Method

Formula

Size (cm) ÷ 2.54 = size in inches
Required pixels ≈ inches × target DPI

Example

Printing a 10 cm × 15 cm phone case at 300 DPI:

10 ÷ 2.54 ≈ 3.94 inches

15 ÷ 2.54 ≈ 5.91 inches

Required pixels:

3.94 × 300 ≈ 1182 px

5.91 × 300 ≈ 1773 px

Minimum recommended resolution: 1182 × 1773 px

Pixel requirements for common sizes (calculated at 300 DPI)

Printed finished size (approx.)	Actual Size (cm)	Actual Size (inch)	Recommended minimum pixels (width × height)
Small icon / sticker	5 × 5	2.0 × 2.0	≥ 600 × 600 px
Phone case	10 × 15	3.9 × 5.9	≥ 1200 × 1800 px
A5 Area	14.8 × 21	5.8 × 8.3	≥ 1750 × 2500 px
A4 Area	21 × 29.7	8.3 × 11.7	≥ 2500 × 3500 px

⚠️ Note: If the image resolution is significantly lower than the values above, the printed result may appear blurry, jagged, or grainy.

Minimum Text Size Guidelines

When using the built-in text tool, the recommended minimum font size is 2 pt to ensure legibility and sharp edges in print.

Usage Notes and Best Practices

DPI vs. Pixels: DPI defines print density, while pixels define image size. Both must meet requirements to ensure clarity.
Vector files preferred: SVG files are automatically processed in high definition and do not require DPI adjustment.
Avoid scaling up images: Enlarging raster images inside the editor will reduce print quality. Prepare files at the intended print size before uploading.
Small-format prints: For stickers and other small items, 400–600 DPI is recommended to preserve fine details.