Markal 81923 Solid Paint Crayon Heat Treating Annealing

Product Description

The MARKAL 81923 is a solid paint crayon designed for use during annealing and heat-treating operations on metal surfaces. It lays down a consistent oil-base mark that remains legible through high-temperature thermal processes, giving technicians and fabricators a reliable way to mark steel, iron, and aluminum before or during heat cycles. The round tip provides controlled application on both flat and irregular surfaces. At approximately 0.009 pounds, the crayon is lightweight and easy to handle in a shop or field setting.

This marker is suited for metalworking environments where heat-treating, annealing, case hardening, or forge work is performed. It is commonly used by welders, fabricators, machinists, and heat-treat technicians who need a mark that survives elevated temperatures. The oil-base formulation adheres to bare metal surfaces including steel, iron, and aluminum without smearing during handling prior to the heat cycle.

Key Features

• Oil-base solid paint formulation survives high-temperature heat-treating and annealing processes
• Round tip for consistent, controlled marking on flat and irregular metal surfaces
• Compatible with steel, iron, and aluminum substrates
• Black color provides strong contrast on bare metal
• Compact and lightweight at approximately 0.009 pounds for easy shop or field carry

Compatibility

Designed for marking on steel, iron, and aluminum surfaces during annealing and heat-treating operations.

Installation Notes

Applied by hand prior to or during the heat-treat process; no tools required. Ensure the marking surface is free of heavy grease or scale for best adhesion. Follow all applicable shop safety procedures and relevant thermal processing codes when performing annealing or heat-treating operations. Store the crayon away from extreme heat when not in use to preserve its integrity.