KOH-I-NOOR 30 cm Plastic Ruler

The KOH-I-NOOR 30 cm plastic ruler is a reliable and precise measuring instrument crafted for everyday use in educational, professional, and creative environments. Constructed from high-quality, durable plastic, this ruler provides a stable edge for drawing straight lines and accurate length measurements. Its transparent or semi-transparent finish ensures that the surface underneath remains visible, while the clearly printed metric scale allows for quick and error-free readings during technical tasks or general school assignments.

Advantages

This ruler stands out due to its lightweight and slim profile, which allows it to fit easily into any standard pencil case, school bag, or desk organizer. The high-quality plastic material is resistant to minor impacts, ensuring a long service life even with frequent handling. The precision-engineered metric markings are designed to resist fading, maintaining their clarity over time. Its smooth edges provide a clean guide for pens, pencils, and markers, making it an ideal tool for both drafting and underlining text.

Suitable for

• School projects and geometry assignments
• Office administrative tasks and document preparation
• Technical drawing and architectural sketching
• General arts and crafts activities
• Measuring paper, photos, and small objects

When it may not be suitable

This ruler is not intended for heavy-duty industrial cutting or as a guide for sharp utility knives, as the plastic edge may be damaged by blades. It is also not suitable for high-heat environments where the material could warp or deform.

Key specifications

• Length: 30 cm
• Material: High-quality plastic
• Measurement system: Metric (millimeters and centimeters)
• Design: Slim and lightweight

How to use

To use the ruler, place the zero-mark edge at the starting point of the object or line you wish to measure. Ensure the ruler is held flat against the surface to prevent parallax errors. When drawing a line, hold the ruler firmly in place with one hand and guide your writing instrument along the straight edge with the other. For best results, keep the pencil or pen tip perpendicular to the paper surface.

What to consider before purchase

• Verify that the 30 cm length is sufficient for your specific drawing or measuring needs.
• Ensure the metric scale meets the requirements of your curriculum or professional field.
• Consider if a rigid metal ruler is required instead for cutting tasks.

Usage recommendations

To maintain the accuracy and readability of the markings, avoid using harsh chemical cleaners on the ruler. Clean it periodically with a soft, damp cloth and store it in a flat position to prevent bending or warping over time.