Figure 6. Optical images of GaIn₁₀-based liquid metal ink directly written on papers using brush pen.

(A) Optical image of conductive text written on typing paper by using GaIn₁₀-based liquid metal ink. (B) and (C) Optical images of conductive lines in bent states written on typing paper by using GaIn10-based liquid metal ink. (D) and (E) Optical images of conductive lines covered with a polyvinyl chloride film.