EXHIBIT 3.1B ARTICLES OF AMENDMENT TO THE ARTICLES OF INCORPORATION OF ACX TECHNOLOGIES, INC. Pursuant to Section 7-110-106 of the Colorado Corporate Code, ACX Technologies, Inc., a Colorado corporation (the "Corporation"), hereby certifies as follows: 1. The name of the corporation is ACX Technologies, Inc. 2. Article One of the Articles of Incorporation is hereby amended to read in its entirety as follows: "The name of the corporation is Graphic Packaging International Corporation." 3. This amendment to the Articles of Incorporation was adopted by a vote of the shareholders of the Corporation on May 9, 2000. The number of shares voted for the amendment was sufficient for approval. 4. Except as amended hereby, the provisions of the Articles of Incorporation shall remain in full force and effect. Dated: May 12, 2000 ACX TECHNOLOGIES, INC. By:_______________________ Jeffrey H. Coors Chairman and President