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The Originators of the

HB Degree System

Hardtmuth® Graphite is a premium lead that has been used in our professional artist’s pencils since 1802. Franz Hardtmuth, inventor of the graphite degree system, chose H after the family name Hardtmuth, B for the town Budějovice where our pencils are made, and F after himself. This varied degree drawing instrument has received accolaids from the world fairs in New York, Paris, London, Vienna, and Milan, and from Queen Victoria, who bestowed the name Koh-I-Noor on the pencils after the world reknown diamond as a representation of their finest quality.

Blocks & Sticks


Graphite Range 3 Degrees: 2B, 4B, 6B
Sepia Range 4 Tones: Russet, Light Brown, Dark Brown, White
Charcoal Range 3 Degrees: 1 (Soft),    
2 (Medium), 3 (Hard)
Shape: Square Blocks, Hexagon Sticks

Pure Hardtmuth leads provide the widest coverage in the Koh-I-Noor graphite range. Solid graphite drawing instruments come in 1/4" x 3" blocks and 3/8" x 4 3/4" sticks. Blocks are available in graphite, artist sepia range, and charcoal, while sticks are available in 2B and 4B graphite. Our blocks can be shaped with a sanding block, while the graphite sticks can be sharpened with an extra large hole sharpener or block. The shavings can be used for smudging, providing the artist with a range of tonal values.

Artist Blocks
Jumbo Graphite Sticks

Graphite Blocks, 6 Set, 2 ea. 2B, 4B, 6B

Part No. FA4390

Artist Block, Sepia Block 6 Pack

Part No. FA4392

Artist Block 2 Set, Russett Blocks

Part No. FA4392RU.2BC

Jumbo Woodless Graphite, 2 Pack, 2B and 4B, Carded

Part No. FA8971.2BC

Graphite Blocks, 2 Pack, 2B

Part No. FA4390.2BBC

Artist Block 2 Set, Dark Brown Blocks

Part No. FA4392DB.2BC

Charcoal Blocks, 6 Pack

Part No. FA8683

Artist Block 2 Set, White Chalk Blocks

Part No. FA4391WC.2BC

Artist Block 2 Set, Light Brown Blocks

Part No. FA4392LB.2BC

Charcoal Blocks, Degree 1, 2 Pack, Carded

Part No. FA8683.2BC1

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