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公开(公告)号：US20240066911A1
公开(公告)日：2024-02-29
申请号：US18258128
申请日：2021-12-17
申请人： Société BIC
发明人： Myriam OGER
CPC分类号： B43L19/0025 , B43K29/02
摘要： The present disclosure relates to a friction body for discoloring handwriting written with a thermochromic ink with frictional heat, wherein the friction body comprises a surface portion configured to generate frictional heat when manually rubbed on a porous substrate and wherein the surface portion has a thermal effusivity of less than about 300 J K−1 m−2 s−1/2.
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