Title:
ECO-FRIENDLY HUMIDITY INDICATOR CARD
Document Type and Number:
WIPO Patent Application WO/2013/005974
Kind Code:
A3
Abstract:
The present invention relates to a humidity indicator card having a humidity indicator function, which can be used for managing humidity in a manufacturing facility for manufacturing electric and electronic products, home appliances, paper, food packaging, or the like, or for managing product humidity. A humidity indicator ink is applied to a predetermined portion of a card having a predetermined area so as to form one or more humidity indicators, wherein the humidity indicator ink consists essentially of: 70 to 98 wt % of a main indicator made of 95 to 99.9 wt % of an alcohol solvent having 1 to 4 carbon atoms, and 0.1 to 5 wt % of an indicator agent; 0.1 to 10 wt % of one or more alkaline solutions selected from among a buffer solution, a sodium hydroxide solution, and a potassium hydroxide solution; 1 to 20 wt % of a humectant; 0.1 to 5 wt % of a pigment; 0.1 to 3 wt % of a dispersant; and 0.1 to 5 wt % of a sunscreen agent. The humidity indicators are configured such that the pH level of the humidity indicator ink may vary, and thus the color of the ink may vary, in accordance with variation in relative humidity.
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Inventors:
KIM KI-BAE (KR)
Application Number:
PCT/KR2012/005284
Publication Date:
February 28, 2013
Filing Date:
July 03, 2012
Export Citation:
Assignee:
DAHA TECH CO LTD (KR)
KIM KI-BAE (KR)
KIM KI-BAE (KR)
International Classes:
G01N31/22; G01N21/81
Foreign References:
| KR20110009372A | 2011-01-28 | |||
| KR100676777B1 | 2007-02-02 | |||
| KR20040106308A | 2004-12-17 | |||
| KR100924057B1 | 2009-10-27 |
Attorney, Agent or Firm:
PHIL & ONZI INT'L PATENT & LAW FIRM (Banpo-daero,Seocho-gu, Seoul 137-872, KR)
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Claims: