The Listo 1620 Mechanical Chinagraph Pencil is the professional choice for marking on non-porous surfaces in site investigation and field engineering work. Unlike traditional wooden chinagraph pencils, the mechanical barrel eliminates the need for sharpening — simply twist to advance the lead. No more broken points, no shavings in your sample bags, and no wasted material.

Chinagraph pencils write on virtually any surface — glass, plastic, metal, polythene sample bags, core boxes, trial pit marker pegs, and geotechnical photo boards. The waxy, oil-based lead is weather resistant and remains legible in wet site conditions where a standard graphite pencil would smear or fade.

Supplied as a box of 12 pencils. Available in Black, Red, and Blue.

Key features:

• Mechanical barrel — twist to advance, no sharpening required
• Writes on non-porous surfaces — polythene, glass, metal, plastic
• Weather resistant — legible in wet and cold conditions
• Oil-based waxy lead — bold, clear marks
• Available in Black, Red, and Blue
• Box of 12 — ideal for equipping a full site investigation team

Typical applications:

• Labelling soil and rock sample bags directly
• Marking core box trays and sample containers
• Writing on polythene sheeting and plastic pegs
• Site photography reference marks
• General site marking on non-porous materials

Availability and Dispatch

Availability and lead times vary by product. Some items are held in stock, while others are ordered from our suppliers. Please contact us through the contact option available on this sales channel before ordering if you require confirmation of availability or delivery times.

Why Buy from Geo Site Supply?

• Free standard UK delivery
• Worldwide delivery available
• Secure checkout
• Product suitability and technical support available through this sales channel