Hydrogel bead, chemical sensor including the same, container and electronic article including the chemical sensor

Abstract

Disclosed herein are a hydrogel bead, a chemical sensor including the same, and an electronic product including the chemical sensor. The hydrogel bead includes at least one type of polysaccharide physically crosslinked with a cation or an anion, and a pH indicator dye.

Dependencies are inferred from the claim text.