EconAlum is anodized aluminum that is with open pores as received.  It may be marked or imaged by screen printing PolyColor inks directly into the open pores.  Like Metalphoto, EconAlum plates are sealed after printing.  Sealing the plates has the effect of trapping the ink within the anodic layer so that the image is sub-surface in nature, making it virtually impervious to abrasion, chemicals, moisture, humidity and salt spray.

EconAlum is extremely stable as a result of our manufacturing process.  The pores will not seal unless and until plates are actually put through the sealing process.  What that means for you is that EconAlum has a long shelf life relative to competitive, self-sealing materials and will process and perform with greater consistency as a result.