国家/地区 中国（2）
IPC部 B（3）
IPC大类 B43（3）
IPC小类 B43K（3）
IPC B43K019/18（2） C09D013/00（2）
发明人
公开年
申请年
专利权人

Pen capable of writing on wet surface comprises pen core installed in pen rod and ink and sealant are filled in pen core sequentially from bottom to top, ink comprises aqueous-based acrylic emulsion, graphene oxide, carbon, film-forming auxiliary agent, stabilizing agent and volatile alcohols.

LI Y, REN J, YAN M, CUI N, CUI H, GUO S, ZHANG B, CHU J, LI L

High strength pencil core comprises sodium thiosulfate, sodium humate, graphene, talc, food grade paraffin wax, sodium carboxymethyl cellulose and clove oil.

YUAN D, WANG H

Pencil lead for e.g. mechanical pencil, contains graphite and graphene nano ribbon contacting with ab surface of graphite.

ENDO M, KITAZAWA K, SAKANISHI S, SUDA Y