Understanding Double Impressions On TabletsPrint
Description: Double Impression includes punches that embed monograms or images on tablets.
Cause: During the impression stage, each tablet undergoes imprinting. In the said stage, engraving machines imprint on the tablet; with the double imprinting, the lower punch might be uncontrolled and drops freely the short distance causing a new imprint on the tablet producing the double imprint on the tablet.
Another problem is when the upper punch is left unrestrained, the punch can also travel uninhibitedly towards the compression stage and accidentally imprints the tablet for the second time causing the “double impression” on the tablet.
|Rotation of either the upper or lower die during pressing or ejection process|