国家/地区 中国（2）
IPC部 B（2） C（2）
IPC大类 B43（2）
IPC小类 B43K（2）
IPC
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