​A print option is a critical finishing option when purchasing a brushed aluminum sign that will determine the final look of your sign. Most substrates are white, to begin with, making them a perfect canvas for direct print. Textured materials like brushed aluminum tend to allow the board's texture to show through the ink. A spot white lay of ink is required to "block out" the textured surface behind the color ink layer. Without a white layer of supporting ink, the final appearance of the sign would allow the brushed aluminum texture to show through the color in your design.
Spot White Print Option
"Spot white" is a printing term that refers to the white ink layer printed in select areas in the file where there are defined CMYK colors. This means the graphic artist controls what remains to hold the brushed metal textured finish by leaving those areas transparent on the print-ready file.