Hot Stamping
Hot Stamp Basics
Roll Leaf and Multi-color Heat Transfers: Metal (gold, silver, chrome & bronze) pigments (flat & luster), manufactured on paper cellophane, and mylar are available in all kinds of specially printed foils, such as woodgrain and metallized patterns. Heat transfers can be made specific to artwork.
Dies and Rollers: Metal (zinc, magnesium, copper, brass & steel), silicone rubber (sheet or molded contours and imprint dies), and plastic.
Die and Surface Temperature: Accurate temperature must be maintained on the face of the die. Silicone rubber dies require approximately 100° or higher thermostat temperature than metal dies due to insulation factors.
Dwell Time: The time on the work must be accurate. An exact combination of heat and time (total heat) is required in order to transfer and adhere the leaf properly.
Pressure: Roll leaf marking is a technique of combining heat and pressure. The die must be mounted on the center of the force. Many machines are air starved and do not build up the pressure required because of reduced air flow due to small, quick change couplers. Without proper pressure or power, quality and definition is lost when marking; hot stamp machines built by ToolTex are designed to avoid this common issue.
Make-Ready and Tooling Support: Make-ready acts as the bed or nest to support the impression and compensate for part variation. Examples of make-ready: thick, hard, smooth, paperboard, rubberized cork material, thick rubberized materials of urethane of different hardness. Soft chipboard or improper make-ready will ruin the quality of a stamping job.
Cure Cycle and Stripping Action: Some special foils and transfers are unsuccessful without specific stripping action. However, care must be taken to insure that the leaf and material have been properly cured before the stripping action so as not to disturb the quality of the end product.
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