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B&Q£7.71Visit shop B&Q - Caran D'ache Technograph 2mm H Replacement Leads3Pcs Technical Pencil Refills
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The Caran d'Ache Technograph 2mm 3H Replacement Leads are designed for engineers, architects, students, and artists who prioritize precision and consistency in their technical drafting and detailed sketching. These high-quality leads offer a hard 3H grade that produces clean, sharp lines without smudging, making them an essential tool for schematics and mathematical diagrams. While their hardness is ideal for technical accuracy, users should note that they may be too light for casual writing or soft shading tasks compared to standard B-grade graphite.
| Model Part Number | 1438541 |
|---|---|
| Brand | Caran d'Ache |
Yes, these are standard 2mm leads designed for any professional 2mm clutch pencil or lead holder.
3H lead is significantly harder and lighter than HB, making it ideal for clean, sharp technical lines that do not smudge.
While possible, 3H is very light and hard, so it is better suited for structural lines and technical drafting rather than dark, artistic shading.
Each pack contains 3 high-quality 2mm 3H leads.
You will need a standard 2mm lead pointer or sharpener, which is typically integrated into the cap of most professional 2mm lead holders.
Clean the clutch jaws of your lead holder with a dry cloth to remove graphite buildup that may be preventing a firm grip.
Check your pencil's clutch for damage or ensure you are not using excessive pressure; 3H lead is hard and designed for light, precise strokes.
To install these leads, ensure your 2mm technical pencil or lead holder is clean and free of graphite dust. Depress the clutch mechanism on your pencil, insert the lead through the nose of the device, and adjust to your preferred length.
Compatibility: These leads fit all standard 2mm lead holders and technical clutch pencils. Do not attempt to force them into mechanical pencils designed for thin-lead refills (e.g., 0.5mm or 0.7mm), as they are incompatible.
Care Instructions: Keep the lead tube in a dry place to prevent moisture exposure, which can affect the performance of the graphite. Avoid dropping the leads, as internal fractures can cause the leads to snap frequently during use.
