grafitové ceruzky špeciálne

tvrdosť ceruziek

Značenie tvrdosti grafitových ceruziek

Európsky systém používa kombináciu písmen H (hard) tvrdý, F (firm) pevný a B (black) mäkký.
Najmäkšia tuha je 9B a najtvrdšia je 9H (čím väčšie číslo - tým väčšia mäkkosť alebo tvrdosť).

Tvrdosť tuhy určuje podiel grafitu a ílu. Čím viac je ílu primiešaného, tým je tuha tvrdšia.

V obchodoch môžete taktiež naraziť na označenie ceruziek 1, 2 a 3, ide o tri najpoužívanejšie tuhy pre školákov.
Ceruzka č. 1 odpovedá tuhe B, ceruzka č. 2 tuhe HB a č. 3 označuje tuhu H.
Jednotka a dvojka sú určené na písanie a kreslenie, trojka je tzv. rysovacou ceruzkou.

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Code:UKL321

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Code:TTS404644

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Code:326307

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Code:6314

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Code:16000

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Code:321/01-HB

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1,65 € with VAT
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STABILO EASYgraph graphite pencil for left-handed people - light blue
Code:321/02-HB

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1,65 € with VAT
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STABILO EASYgraph graphite pencil for right-handed people - green
Code:322/04-HB

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1,7 € with VAT
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Code:62100024

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0,71 € with VAT
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Code:02324

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Code:5028

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0,24 € with VAT
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Code:325/02-HB

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Code:0295

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0,7 € with VAT
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Code:0214

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0,54 € with VAT
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STABILO EASYgraph S graphite pencil for right-handed people - green
Code:326/04-HB

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1,25 € with VAT
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STABILO EASYgraph graphite pencil for right-handed people - pink
Code:322/01-HB

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1,7 € with VAT
In stock
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Code:TST8041

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1,6 € with VAT
Out of stock
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