What artwork guidelines should I follow to ensure the best printing results?Graphics: Use vector images or 300 dpi bitmaps.Colors: Stick to CMYK (no RGB).Special Finishes: For spot UV, hot foiling, or embossing, use a spot color named after the finish.Lines & Text: Minimum line thickness of 0.5 pt and text size of 6 pt; convert all fonts to outlines.Safe Area & Bleeds: Keep vital elements 3 mm from die lines and extend artwork by 3 mm to avoid blank edges.