REF
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W.M. Korn's
REF
Only a core, it must be used with a holder.
Used in lithography for drawing on stones, alu and zinc plates, or on films but also used as a resist in etching (advised hardnesses: 2 or 3)
Available in 5 hardnesses:
N°1 - soft
N°2 - medium
N°3 - hard
N°4 - extra hard
N°5 - extra hard (with copal)
Specific References
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