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US 12,104,069 B2Granted
Epidermal penetration type ink composition
AssigneeNational Cancer Center
InventorsSeok-ki Kim, Sang Hyuk Lee, Jin Hee Noh
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Abstract
The present invention provides an epidermal penetration type ink composition comprising: a fluorescent colorant containing at least one selected from the group consisting of indocyanine green (ICG), cyanine, phthalocyanine, oxazine, rhodamine, and a mixture thereof; a binder resin containing at least one of polyvinylpyrrolidone (PVP) and polyvinylbutyral (PVB); and a solvent containing at least one of ethanol and isopropanol.
Claims4
An ink composition which penetrates into the stratum corneum of the skin, comprising:
- a fluorescent colorant, wherein the fluorescent colorant is indocyanine green (ICG);
- a binder resin, wherein the binder resin is a combination of polyvinylpyrrolidone (PVP) and polyvinyl butyral (PVB);
- and
- a solvent, wherein the solvent is ethanol,
- wherein a concentration of fluorescent colorant is in the range of 0.02 mM to 20 mM, a concentration of the combination of PVP and PVB is the range of 3 to 5 wt % relative to the total composition of 100 wt %, and an amount of the ethanol is in the range of 5 to 10 wt % relative to the total composition of 100 wt %.
2 more elements
Dependencies are inferred from the claim text.