In the Collage Classes that is taught in Lonecrow Studio that are not in a sketchbook use an irons and coating of papers.

When we aren't working with a tack iron, we are usually in a sketchbook with magazines and a glue stick.

List if some irons that can be used:

Green Encaustic Iron

House Iron General house Iron works, No Steam though.

Heat Seal Iron, "Tack Iron"

Always use a safety release sheet between the iron and coated papers like parchment paper.