A4 paper frame

thingiverse

The card, an A4 size, is securely placed beneath the laser due to the absence of honeycomb support. This results in reduced reflection and improved airflow, minimizing ash buildup that could smudge the work. Further details can be found on my blog at http://msraynsford.blogspot.com/2012/02/card-frame-2.html. Additionally, the frame is designed with snug slot and tab connections, eliminating the need for glue; however, a small dab of adhesive in each corner can further enhance stability.