... printing, No pretreatment before printing Digital printing aluminum composite panel for signage Aluminum Composite Sign board,Road sign, Billboard,POP ... be sculptured,folded, wrinkling,delamination.4.Using special protective film,wear resistance,easy peeling and easy to use.5.Environmental ... 6mmWidth: 1220mm,1500mmLength:2440,3050,3660mm,4000mm Digital printing aluminum composite panel for signage