Resolution begins with final size
Determine the exact production dimensions first, then verify that raster artwork has enough pixels for the supplier's requested resolution at that size. Enlarging a small file changes its pixel count but does not recreate trustworthy detail. Inspect edges, textures, and faces after any upscale.
Calculate effective density from output pixels divided by target inches. Changing only the file's DPI label adds no image information. Acceptable density varies by process, material, and viewing distance, so use the selected supplier's current requirement rather than a universal number.
Keep vector elements as vectors where the workflow supports them, and preserve an editable master before flattening.
Control transparency and edges
Transparent-background art needs clean masks, no white or dark halo, and no unintended semi-transparent debris. Inspect on light, dark, and contrasting backgrounds. Decide whether soft shadows are part of the design or an artifact of extraction.
Some print methods treat partial transparency unpredictably. Follow the selected supplier's current guidance.
Hair, feathers, glass, and soft shadows need more than a yes/no transparency check. Inspect enlarged edges and then view the image again at physical print size on light and dark backgrounds.
Separate bleed, trim, and safe area
Bleed extends background artwork beyond the final cut. The trim line is the intended edge. The safe area keeps essential text and faces away from cutting variation, folds, or seams. These zones are not interchangeable and their measurements vary by product.
Extend backgrounds into bleed; do not simply scale the entire composition until important content enters it.
Export and preflight deliberately
Before export, confirm template version, dimensions, orientation, color instructions, transparency, spelling, personalization, embedded or outlined fonts as required, and file-size limits. Use the requested format and naming convention. Open the exported file independently to verify that it matches the master.
Archive the editable master, approved proof, and exact production export together with supplier and date checked.
A complete preflight also verifies text treatment, hidden layers, line weight, color count where relevant, personalized names and dates, and a reopened export against the approved proof.