What is a pencil slat?

A rectangular block or piece of treated wood that is grooved and glued to form multiple pencils.

Why is moisture content regulated for these slats?

To ensure dimensional stability so the slats do not warp or split during machining or after the pencil is manufactured.

What defects are strictly prohibited in pencil slats?

Defects such as live or dead knots, shakes, splits, and severe cross-grain are prohibited as they disrupt the machining process and affect sharpenability.

IS 3084

: 1989

Pencil slats

CurrentSpecializedSpecificationMaterials Science · Timber and Timber Stores

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This standard specifies the requirements for wooden slats used in the manufacture of pencils. It outlines acceptable timber species, exact dimensions, moisture content limits, and permissible defects to ensure proper machining and high-quality pencil production.

Pencil slats

Quick Reference Values

moisture content limit10 to 12 percent

standard slat length184 mm

standard slat width 6 ply58 mm

thickness tolerance± 0.2 mm

Practical Notes

Strict control of moisture content (usually 10-12%) is essential to prevent warping of the slats and the finished pencils.

Timber must be carefully selected to be free of knots, cracks, and severe cross-grain to ensure smooth grooving and easy sharpening by the end-user.