Metal Leadholder 5.6 mm Lead
Innovative for Centuries. Koh-i-Noor.
The history of the renowned pencil manufacturer Koh-i-Noor dates back to the 18th century. Throughout the world, Koh-i-Noor became known through the innovative invention of Joseph Hardtmuth, who in 1792 developed a novel method for pressing and baking pencil leads - mines did not have to be cut from the solid stone any longer. This innovative ability has been preserved at Koh-i-Noor to this day.
Drop action pencils, propelling pencils and rectable pencils have two things in store the wooden pencil cannot provide:
1.) They are available in a variety of mine formats, which in turn are catering to a variety of purposes - from technical drawing to large-format sketching and signing, and 2.) they are sustainable because they are refillable.
Article Number 71233
Length 14 cm. Weight 40 g.
From Koh-I-Noor made in the Czech Republic. The leadholder is made entirely of metal, and is therefore heavy, but especially for this reason it has the perfect balance. With a lead sharpener integrated into the unscrewable push button. Ideal for graphite and artist leads with a diameter of 5.6 mm. For easy identification of the inserted lead we offer different casing colors: green, silver, blue or red.
Compared to the wood-cased pencils, leadholders, click pencils and twist pencils have two principal advantages: 1. for technical drawings up to oversized sketching and signatures various types of leads for different purposes are available, and 2. they can be used many times because they can be refilled.
Pencils and accessories.
"If one should make a lead himself! Imagine mankind disappeared and you have to make a lead! ? magic!" (Arno Schmidt) The name is misleading. A lead does not contain any lead. This only applied to its predecessor in the 15th century. Dürer, for example, used lead-alloyed or tin-alloyed leads. The history of the pencil as it is today, only began in the 17th century. At that time the English graphite mines were discovered and mining activities began. Graphite is predestined to be used as pencil leads due to its solid body structure (the lattice layers of the graphite slightly slide away from each other when under pressure). The graphite leads sawn from one piece were real treasures. This remained the case until the end of the 18th century, when the Frenchman Nicolas Jacques Conté and the Austrian Josef Hardtmuth developed a method to produce graphite leads ceramically. They mingled graphite dust with clay and baked the leads in the oven. Here, the hardness of the lead is determined by the amount of clay and the firing time. The grade is indicated ? from soft to hard ? with the acronyms B (black), HB (hard-black), F (firm) und H (hard), whereby the B and H variants are further differentiated by the numbers 2 - 9 (the higher the number the softer or harder the lead).
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