JPH0755788A - Moisture indicator - Google Patents
Moisture indicatorInfo
- Publication number
- JPH0755788A JPH0755788A JP20604593A JP20604593A JPH0755788A JP H0755788 A JPH0755788 A JP H0755788A JP 20604593 A JP20604593 A JP 20604593A JP 20604593 A JP20604593 A JP 20604593A JP H0755788 A JPH0755788 A JP H0755788A
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- Prior art keywords
- water
- color
- indicator
- acid
- layer containing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、水の付着、浸漬等によ
り変色し、速やかに画像が破壊され無色となる水検知イ
ンジケ−タ−に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water detection indicator which discolors due to water adhesion, immersion, etc., and quickly destroys an image to become colorless.
【０００２】[0002]
【従来の技術】酸塩基指示薬は、特定の水素イオン濃度
に変色域を持っており、変色域内では変色（発色）する
特性を持っていることが知られている。この特性から、
アルカリ物質類を共存させ、玩具、文房具等に利用され
ている。しかしながら、アルカリ物質類を共存させる
と、大気中（特に、高温、高湿の状態）に放置したり、
手で触れたりすることにより、変色（発色）してしま
う。また、変色（発色）機構が水による可逆的な変化で
あり、水が蒸発して水が存在しなくなると元の色に戻る
ため、水の付着、浸漬による変化を簡便に目視により判
定できず、水検知インジケ−タ−としては用いることが
できなかった。2. Description of the Related Art It is known that acid-base indicators have a color-changing region at a specific hydrogen ion concentration and have a property of changing color (coloring) within the color-changing region. From this characteristic,
Used in toys, stationery, etc. in the presence of alkaline substances. However, when alkaline substances are allowed to coexist, they may be left in the atmosphere (especially high temperature and high humidity),
Discoloration (coloring) will occur if you touch it with your hand. In addition, the color change (coloring) mechanism is a reversible change due to water, and when water evaporates and water disappears, it returns to the original color, so it is not possible to easily visually judge the change due to water adhesion or immersion. However, it could not be used as a water detection indicator.
【０００３】一方、水の付着、浸漬の検知は、電子機材
分野では製品の保守の点から、食品の流通分野では品質
管理の点から非常に興味が持たれている。なかでも食品
の流通分野では、冷凍食品の流通工程において温度変化
により冷凍食品が解凍された場合、食品の安全性に影響
を及ぼすと考えられる。しかし、現状では冷凍食品が一
旦解凍されても、再度冷凍されてしまった場合には、こ
れを目視により簡便に検知できる方法がない。On the other hand, detection of water adhesion and immersion is of great interest from the viewpoint of product maintenance in the electronic equipment field and from the point of quality control in the food distribution field. Among them, in the field of food distribution, it is considered that when frozen foods are thawed due to temperature changes in the distribution process of frozen foods, food safety is affected. However, under the present circumstances, there is no method for easily detecting the frozen food once it is thawed and then frozen again.
【０００４】[0004]
【発明が解決しようとする課題】本発明者らは、上記問
題を解決すべく鋭意検討した結果、基材に新油性の顕色
層、親水性の発色層および親水性の保護層を順次積層し
てなる水検知インジケ−タ−が、水の付着、浸漬により
速やかに変色し、画像の破壊を経て無色に変化すること
を見出し、本発明に至った。DISCLOSURE OF THE INVENTION As a result of intensive studies to solve the above problems, the present inventors have found that a new oily color developing layer, a hydrophilic color developing layer and a hydrophilic protective layer are sequentially laminated on a substrate. The present inventors have found that the water detection indicator formed as described above is rapidly discolored by the attachment and immersion of water, and then becomes colorless after image destruction.
【０００５】[0005]
【課題を解決するための手段】本発明は、基材に、固体
粉末の無機金属塩または無機物とエチレン−酢酸ビニル
共重合系樹脂とを含む顕色層、変色域の異なる２種類以
上の酸塩基指示薬または酸塩基指示薬および染料とセル
ロ−ス系樹脂とを含む発色層およびセルロ−ス系樹脂を
含む保護層を順次設けてなる水検知インジケ−タ−を提
供する。According to the present invention, a base material contains a solid powdered inorganic metal salt or inorganic material and a developer layer containing an ethylene-vinyl acetate copolymer resin, and two or more kinds of acids having different color change regions. Provided is a water-detecting indicator comprising a color-developing layer containing a base indicator or an acid-base indicator and a dye and a cellulose resin, and a protective layer containing a cellulose resin.
【０００６】本発明の水検知インジケ−タ−は、水の存
在しない状態で安定した色相を示す酸塩基指示薬または
染料を発色層に含むため、当初は有色を示す。これに水
が付着すると、水は保護層および発色層に浸透して顕色
層に達し、顕色層中の固体粉末の無機金属塩または無機
物に吸収される。水を吸収した無機金属塩または無機物
は解離イオンとなり、水に溶解した発色層中の他の酸塩
基指示薬と結合して変色が起こる。次いで、過剰の水
が、保護層および発色層を顕色層との界面から溶解し、
画像を破壊して無色になる。The water detection indicator of the present invention initially shows a color because it contains an acid-base indicator or a dye which shows a stable hue in the absence of water in the color forming layer. When water adheres to this, water permeates the protective layer and the color-developing layer to reach the color-developing layer, and is absorbed by the inorganic metal salt or the inorganic substance of the solid powder in the color-developing layer. The inorganic metal salt or inorganic substance that has absorbed water becomes a dissociated ion and binds with another acid-base indicator in the color-developing layer dissolved in water to cause discoloration. Then, excess water dissolves the protective layer and the color-developing layer from the interface with the color-developing layer,
The image is destroyed and becomes colorless.
【０００７】基材としては、紙、コ−ト紙、プラスチッ
クフィルム、プラスチッルムと紙の積層体およびタッグ
紙が用いられる。As the base material, paper, coated paper, plastic film, a laminate of plastic film and paper, and tag paper are used.
【０００８】顕色層は、固体粉末の無機金属塩または無
機物とエチレン−酢酸ビニル共重合系樹脂とを含む。エ
チレン−酢酸ビニル共重合系樹脂は、無機金属塩または
無機物とのインキ化適性、安定性に優れ、基材との接着
性が良い。また、エチレン−酢酸ビニル共重合系樹脂は
親油性のため、水により親水性の発色層および保護層を
速やかに溶解させ、画像破壊性に優れる。エチレン−酢
酸ビニル共重合系樹脂としては、エチレン−酢酸ビニル
共重合物およびそのハロゲン化物が挙げられる。なかで
も、エチレン−酢酸ビニル共重合物の酢酸ビニル含有量
が15〜40重量％の樹脂が好ましい。顕色層には、必要に
応じて、他のウレタン系、ポリオレフィン系、ポリアミ
ド系樹脂も使用できる。The color-developing layer contains a solid powder of an inorganic metal salt or an inorganic substance and an ethylene-vinyl acetate copolymer resin. The ethylene-vinyl acetate copolymer-based resin has excellent inkability with an inorganic metal salt or an inorganic substance, stability, and good adhesiveness with a substrate. In addition, since the ethylene-vinyl acetate copolymer resin is lipophilic, it quickly dissolves the hydrophilic color-forming layer and the protective layer in water and is excellent in image destructiveness. Examples of the ethylene-vinyl acetate copolymer resin include ethylene-vinyl acetate copolymers and halides thereof. Above all, a resin having a vinyl acetate content of the ethylene-vinyl acetate copolymer of 15 to 40% by weight is preferable. Other urethane-based, polyolefin-based, and polyamide-based resins can be used in the color-developing layer, if necessary.
【０００９】顕色層に使用する固体粉末の無機金属塩と
しては、水酸化ナトリウム、水酸化カリウム、水酸化カ
ルシウム、水酸化マグネシウム、炭酸カリウム、炭酸ナ
トリウム（無水）、炭酸（水素）ナトリウム、炭酸カル
シウム、酢酸ナトリウムが挙げられる。また、固体粉末
の無機物としては、ホウ酸が挙げられる。なかでも、安
定性、変色速度および変色性から、炭酸カリウム、炭酸
ナトリウム（無水）および水酸化マグネシウムが好まし
い。Solid powder inorganic metal salts used in the color developing layer include sodium hydroxide, potassium hydroxide, calcium hydroxide, magnesium hydroxide, potassium carbonate, sodium carbonate (anhydrous), sodium (hydrogen) carbonate and carbonic acid. Examples include calcium and sodium acetate. Moreover, boric acid is mentioned as an inorganic substance of a solid powder. Among them, potassium carbonate, sodium carbonate (anhydrous) and magnesium hydroxide are preferable from the viewpoint of stability, color change rate and color change property.
【００１０】発色層は、変色域の異なる２種類以上の酸
塩基指示薬または酸塩基指示薬および染料とセルロ−ス
系樹脂とを含む。セルロース系樹脂は、親水性のため、
水を速やかに浸透し、水溶解性に優れる。セル−ス系樹
脂としては、セルロ−ス、メチルセルロ−ス、エチルセ
ルロ−ス、ヒドロキシセルロ−ス、ヒドロキシプロピル
セルロ−ス、カルボキシメチルセルロ−ス等が挙げられ
る。The color-developing layer contains two or more kinds of acid-base indicators or acid-base indicators and dyes having different color change regions and a cellulose resin. Cellulosic resin is hydrophilic,
It quickly penetrates water and has excellent water solubility. Examples of the cellulose resin include cellulose, methyl cellulose, ethyl cellulose, hydroxy cellulose, hydroxypropyl cellulose, carboxymethyl cellulose and the like.
【００１１】発色層に使用する酸塩基指示薬は、特定の
水素イオン濃度で変色（発色）する性質を有するもので
あり、分析化学、コロイド化学の分野では水素イオン濃
度を測定する時の比色測定の指示薬として知られてい
る。代表的な酸塩基指示薬および変色（発色）を、以下
に例示する。 無色−黄色：2,4-ジニトロフェノ−ル、O-ニトロフェノ
−ル 無色−赤色：キナクリドンレッド、フェノ−ルフタレ
ン、O-クレゾ−ルフタレン 無色−青色：チモ−ルフタレン 黄色−青色：ブロムフェノ−ルブル−、ブロムチモ−ル
ブル−、チモ−ルブル− 赤色−黄色：クレゾ−ルレッド、メチルオレンジ、フェ
ノ−ルレッドThe acid-base indicator used in the color forming layer has a property of discoloring (coloring) at a specific hydrogen ion concentration, and in the fields of analytical chemistry and colloid chemistry, colorimetric measurement when measuring the hydrogen ion concentration. Is known as an indicator. Representative acid-base indicators and discoloration (color development) are exemplified below. Colorless-yellow: 2,4-dinitrophenol, O-nitrophenol Colorless-red: Quinacridone red, phenolphthalene, O-cresol-phthalene Colorless-blue: Timolphthalene Yellow-blue: Bromphenol blue- Bromtimole blue-, Timole blue-Red-yellow: Cresol red, methyl orange, phenol red
【００１２】酸塩基指示薬は、目的とする色の変化に合
ったものを用いることができるが、顕色層に使用する固
体粉末の無機金属塩の適性上の問題からアルカリ性側で
変色（発色）する指示薬が好適に用いられる。染料とし
ては、アゾ染料、アントラキノン染料、インジゴイド染
料、硫化染料、キノンイミン染料等が挙げられるが、水
への溶解性から、食用青色１号、食用赤色３号、食用黄
色４号等の食用色素が好適に用いられる。As the acid-base indicator, a substance suitable for the intended change in color can be used, but due to the problem of suitability of the inorganic metal salt of the solid powder used in the color developing layer, discoloration (coloring) occurs on the alkaline side. The indicator used is preferably used. Examples of dyes include azo dyes, anthraquinone dyes, indigoid dyes, sulfur dyes, quinoneimine dyes, etc. It is preferably used.
【００１３】２種以上の酸塩基指示薬としては、ブロム
チモ−ルブル−／フェノ−ルフタレンおよびＯニトロフ
ェノ−ル／フェノ−ルフタレンの組合せが好ましい。ま
た、染料および酸塩基指示薬としては、食用青色１号／
フェノ−ルフタレンおよび食用黄色４号／フェノ−ルフ
タレンの組合わせが好ましい。As the two or more acid-base indicators, a combination of bromtimole blue- / phenol-phthalene and O-nitrophenol / phenol-phthalene is preferable. Further, as the dye and the acid-base indicator, food blue No. 1 /
The combination of phenolphthalene and food yellow No. 4 / phenolphthalene is preferred.
【００１４】保護層は、発色層と同様のセルロース系樹
脂を含む。顕色層、発色層および保護層は、適当な溶媒
に溶解または分散し、印刷、コ−ティング等の方法によ
り、基材に順次設けられる。保護層の溶媒が水を10〜20
重量％含有すると、得られる水検知インジケ−タ−の当
初の着色度合いが鮮やかになり、変色巾が拡がるため、
好ましい。本発明の水検知インジケーターは、水により
影響を受ける用途の一部分に直接印刷、コ−ティングす
ることもできるし、ラベリングすることもできる。The protective layer contains the same cellulosic resin as the color forming layer. The color-developing layer, the color-developing layer and the protective layer are dissolved or dispersed in an appropriate solvent, and are sequentially provided on the substrate by a method such as printing or coating. The solvent of the protective layer is 10-20 water.
When it is contained in a weight percentage, the resulting water-detecting indicator has a bright initial coloring degree and a wide discoloration range.
preferable. The water detection indicator of the present invention can be printed or coated directly on a portion of the application affected by water, or it can be labeled.
【００１５】[0015]
【実施例】以下、実施例に従って本発明を説明する。例
中、部は重量部を、％は重量％をそれぞれ表す。 （実施例１） 発色層形成用組成物 フェノ−ルフタレン ２．０部 ブロムチモ−ルブル− ０．５部 ヒドロキシプロピルセルロ−ス ５．０部 イソプロピルアルコ−ル ４２．０部 酢酸エチル ５０．５部 上記組成物を、サンドミル中で分散し、酸塩基指示薬
2.5％、樹脂固形分 5.0％の発色層形成用組成物を得
た。EXAMPLES The present invention will be described below with reference to examples. In the examples, parts represent parts by weight, and% represents% by weight. (Example 1) Composition for forming color layer Phenolphthalene 2.0 parts Bromothymol blue-0.5 parts Hydroxypropyl cellulose 5.0 parts Isopropyl alcohol 42.0 parts Ethyl acetate 50.5 parts Above Disperse the composition in a sand mill to obtain an acid-base indicator.
A coloring layer-forming composition having 2.5% and a resin solid content of 5.0% was obtained.
【００１６】顕色層形成用組成物 炭酸ナトリウム（無水） ２０．０部 エチレン−酢酸ビニル共重合物 １０．０部 （三井・デュポンポリケミカル社製「エバフレックス 2
50」） トルエン ３５．０部 メチルエチルケトン ３５．０部 上記組成物を、サンドミル中で分散し、無機金属塩20.0
％、樹脂固形分10.0％の顕色層形成用組成物を得た。Composition for developing color layer Sodium carbonate (anhydrous) 20.0 parts Ethylene-vinyl acetate copolymer 10.0 parts ("Eva Flex 2" manufactured by Mitsui DuPont Polychemical Co., Ltd.)
50 ") Toluene 35.0 parts Methyl ethyl ketone 35.0 parts The above composition was dispersed in a sand mill to form an inorganic metal salt 20.0 parts.
%, And a resin solid content of 10.0% to obtain a color layer forming composition.
【００１７】保護層形成用組成物 ヒドロキシプロピルセルロ−ス ５．０部 イソプロピルアルコ−ル ４０．０部 酢酸エチル ４０．０部 水 １５．０部 上記組成物を、ハイスピ−ドミキサ−中で溶解し、樹脂
固形分 5.0％の保護層形成用組成物を得た。Composition for forming protective layer Hydroxypropyl cellulose 5.0 parts Isopropyl alcohol 40.0 parts Ethyl acetate 40.0 parts Water 15.0 parts The above composition was dissolved in a high speed mixer. Thus, a protective layer-forming composition having a resin solid content of 5.0% was obtained.
【００１８】ア−ト紙上に、フレキソ印刷方式にて、顕
色層、発色層、次いで保護層の順番にベタ印刷を行い、
乾燥後の塗布量 1.5〜2.0g/m2 の水検知インジケ−タ−
を得た。得られた水検知インジケ−タ−は、水の滴下に
より、敏感に青から赤に変化し、水が基材に吸収されて
水が存在しなくなると、無色になった。また、インジケ
ーターについて、環境試験（温度40℃、湿度80％、24時
間放置）を行ったところ、色変化は認められなかった。Solid printing is performed on the art paper in the order of the color developing layer, the color developing layer and the protective layer by flexographic printing.
Water detection indicator with coating amount of 1.5 to 2.0 g / m 2 after drying
Got The resulting water-detecting indicator was changed from blue to red by the dropping of water and became colorless when water was absorbed by the substrate and water was not present. In addition, when the indicator was subjected to an environmental test (temperature 40 ° C., humidity 80%, left for 24 hours), no color change was observed.
【００１９】（実施例２）発色層形成用組成物のブロム
チモ−ルブル−を染料（食用黄色４号）に代えた以外
は、実施例１と同様にして水検知インジケ−タ−を得
た。インジケ−タ−は、水の滴下により、敏感に黄から
赤に変化し、水が基材に吸収されて水が存在しなくなる
と、無色になった。 また、環境試験を行ったところ、
色変化は認められなかった。(Example 2) A water detection indicator was obtained in the same manner as in Example 1 except that the dye (Edible Yellow No. 4) was used in place of the bromothymol blue of the composition for forming a color forming layer. The indicator sensitively changed from yellow to red by dropping water, and became colorless when water was absorbed by the substrate and water was not present. In addition, after conducting an environmental test,
No color change was observed.
【００２０】（実施例３）顕色層形成用組成物の炭酸ナ
トリウム（無水）を水酸化マグネシウムに代えた以外
は、実施例１と同様にして水検知インジケ−タ−を得
た。インジケ−タ−は、水の滴下により、若干遅いが、
青から赤に変化し、水が基材に吸収されて水が存在しな
くなると、無色になった。また、環境試験を行ったとこ
ろ、色変化は認められなかった。Example 3 A water detection indicator was obtained in the same manner as in Example 1 except that magnesium hydroxide was used instead of sodium carbonate (anhydrous) in the color-developing layer forming composition. The indicator is slightly slow due to the dropping of water,
It turned from blue to red and became colorless when water was absorbed by the substrate and no water was present. In addition, when an environmental test was conducted, no color change was observed.
【００２１】（比較例１） フェノ−ルフタレン ２．０部 炭酸ナトリウム（無水） ２０．０部 ヒドロキシプロピルセルロ−ス ５．０部 イソプロピルアルコ−ル ５３．０部 酢酸エチル ２０．０部 上記組成物をサンドミル中で分散し、酸塩基指示薬 2.0
％、無機金属塩20.0％、樹脂固形分 5.0％の発色層形成
用組成物を得た。ア−ト紙上に、フレキソ印刷方式に
て、得られた組成物をベタ印刷し、乾燥後の塗布量 0.8
〜1.2g/m2 の水検知インジケ−タ−を得た。インジケ−
タ−は、水の滴下により、敏感に無色から赤に変化した
が、水が基材に吸収されて水が存在しなくなると、無色
に戻った。また、環境試験を行ったところ、僅かに発色
（赤）が認められた。Comparative Example 1 Phenolphthalene 2.0 parts Sodium carbonate (anhydrous) 20.0 parts Hydroxypropyl cellulose 5.0 parts Isopropyl alcohol 53.0 parts Ethyl acetate 20.0 parts The above composition Is dispersed in a sand mill and acid-base indicator 2.0
%, An inorganic metal salt 20.0%, and a resin solid content 5.0% to obtain a color-forming layer forming composition. The composition obtained is solid-printed on an art paper by a flexographic printing method, and the coating amount after drying is 0.8.
A water detection indicator of 1.2 g / m 2 was obtained. Indicator
The target turned from colorless to red sensitively by dropping of water, but returned to colorless when water was absorbed by the base material and water was not present. Further, when an environmental test was conducted, a slight color development (red) was recognized.
【００２２】（比較例２） 顕色層形成用組成物 炭酸ナトリウム（無水） ２０．０部 エチレン−酢酸ビニル共重合物 １０．０部 「エバフレックス 250」 トルエン ３５．０部 メチルエチルケトン ３５．０部 上記組成物をサンドミル中で分散し、無機金属塩20.0
％、樹脂固形分10.0％の顕色層形成用組成物を得た。(Comparative Example 2) Composition for developing color layer Sodium carbonate (anhydrous) 20.0 parts Ethylene-vinyl acetate copolymer 10.0 parts "Evaflex 250" Toluene 35.0 parts Methyl ethyl ketone 35.0 parts The above composition is dispersed in a sand mill, and inorganic metal salt 20.0
%, And a resin solid content of 10.0% to obtain a color layer forming composition.
【００２３】発色層形成用組成物 フェノ−ルフタレン ２．０部 ブロムチモ−ルブル− ０．５部 エチレン−酢酸ビニル共重合物 １０．０部 「エバフレックス 250」 トルエン ４０．０部 メチルエチルケトン ４７．５部 上記組成物をサンドミル中で分散し、酸塩基指示薬 2.5
％、樹脂固形分10.0％の発色層形成用組成物を得た。Composition for forming color layer Phenolphthalene 2.0 parts Bromtimolbule-0.5 parts Ethylene-vinyl acetate copolymer 10.0 parts "Evaflex 250" Toluene 40.0 parts Methyl ethyl ketone 47.5 parts Disperse the above composition in a sand mill to give an acid-base indicator 2.5
%, And a resin solid content of 10.0% to obtain a composition for forming a color forming layer.
【００２４】ア−ト紙上に、フレキソ印刷方式にて、顕
色層、発色層の順番にベタ印刷を行い、乾燥後の塗布量
1.0〜1.5g/m2 の水検知インジケ−タ−を得た。得られ
た水検知インジケ−タ−は、水の滴下により、敏感に青
から赤に変化したが、水が基材に吸収されて水が存在し
なくなると、青に戻った。また、環境試験を行ったとこ
ろ、色変化は認められなかった。Solid printing is performed on the art paper in the order of the color-developing layer and the color-developing layer by a flexographic printing method, and the coating amount after drying is applied.
A water detection indicator of 1.0 to 1.5 g / m 2 was obtained. The resulting water detection indicator sensitively changed from blue to red by dropping water, but returned to blue when water was absorbed by the base material and water was not present. In addition, when an environmental test was conducted, no color change was observed.
【００２５】[0025]
【発明の効果】本発明の水検知インジケ−タ−は、水の
付着、浸漬により速やかに変色し、画像の破壊を経て無
色になるため、水の付着の有無を、水が乾いた後でも、
容易に目視で判定できる。EFFECT OF THE INVENTION The water detection indicator of the present invention is rapidly discolored by the adhesion and immersion of water, and becomes colorless after image destruction. Therefore, the presence or absence of adhesion of water is checked even after the water is dried. ,
It can be easily visually determined.
Claims (1)
機物とエチレン−酢酸ビニル共重合系樹脂とを含む顕色
層、変色域の異なる２種類以上の酸塩基指示薬または酸
塩基指示薬および染料とセルロ−ス系樹脂とを含む発色
層およびセルロ−ス系樹脂を含む保護層を順次設けてな
る水検知インジケ−タ−。1. A color-developing layer containing an inorganic metal salt or inorganic substance of solid powder and an ethylene-vinyl acetate copolymer resin as a base material, two or more kinds of acid-base indicators or acid-base indicators and dyes having different color change regions. A water-detecting indicator comprising a color-developing layer containing a cellulose resin and a protective layer containing a cellulose resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20604593A JP3312438B2 (en) | 1993-08-20 | 1993-08-20 | Water detection indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20604593A JP3312438B2 (en) | 1993-08-20 | 1993-08-20 | Water detection indicator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0755788A true JPH0755788A (en) | 1995-03-03 |
| JP3312438B2 JP3312438B2 (en) | 2002-08-05 |
Family
ID=16516973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20604593A Expired - Lifetime JP3312438B2 (en) | 1993-08-20 | 1993-08-20 | Water detection indicator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3312438B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6460480B1 (en) * | 1998-01-30 | 2002-10-08 | Schloesser Ulrich | Label for plants which can be inserted into the soil |
| US6644236B2 (en) | 2000-03-16 | 2003-11-11 | Ricoh Company, Ltd. | Deterioration indicator and a product having the same |
| JP2007198828A (en) * | 2006-01-25 | 2007-08-09 | Toppan Printing Co Ltd | Moisture indicator and package |
| WO2008081835A1 (en) * | 2006-12-28 | 2008-07-10 | Qualicaps Co., Ltd. | Water leakage indicator and time indicator |
| JP2012181192A (en) * | 2011-02-09 | 2012-09-20 | National Fisheries Univ | Method for detecting bacterium contamination level of fish meat and sensor used for detection method |
| JP2012522991A (en) * | 2009-04-06 | 2012-09-27 | マルチソーブ テクノロジーズ インク | Copper bromide humidity display card |
| JP2016525907A (en) * | 2013-05-24 | 2016-09-01 | スミス アンド ネフュー ピーエルシーＳｍｉｔｈ ＆ Ｎｅｐｈｅｗ Ｐｕｂｌｉｃ Ｌｉｍｉｔｅｄ Ｃｏｍｐａｎｙ | Moisture display system |
| US10288590B2 (en) | 2013-10-08 | 2019-05-14 | Smith & Nephew Plc | PH indicator device and formulation |
| US10520446B2 (en) | 2014-07-10 | 2019-12-31 | Smith & Nephew Plc | Polymer materials |
| US11471076B2 (en) | 2016-01-14 | 2022-10-18 | Smith & Nephew Plc | Device and kit for indicating a pH at a locus |
| US11504033B2 (en) | 2016-01-14 | 2022-11-22 | Smith & Nephew Plc | Polymer materials |
-
1993
- 1993-08-20 JP JP20604593A patent/JP3312438B2/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6460480B1 (en) * | 1998-01-30 | 2002-10-08 | Schloesser Ulrich | Label for plants which can be inserted into the soil |
| US6644236B2 (en) | 2000-03-16 | 2003-11-11 | Ricoh Company, Ltd. | Deterioration indicator and a product having the same |
| JP2007198828A (en) * | 2006-01-25 | 2007-08-09 | Toppan Printing Co Ltd | Moisture indicator and package |
| WO2008081835A1 (en) * | 2006-12-28 | 2008-07-10 | Qualicaps Co., Ltd. | Water leakage indicator and time indicator |
| JP2012522991A (en) * | 2009-04-06 | 2012-09-27 | マルチソーブ テクノロジーズ インク | Copper bromide humidity display card |
| JP2012181192A (en) * | 2011-02-09 | 2012-09-20 | National Fisheries Univ | Method for detecting bacterium contamination level of fish meat and sensor used for detection method |
| JP2016525907A (en) * | 2013-05-24 | 2016-09-01 | スミス アンド ネフュー ピーエルシーＳｍｉｔｈ ＆ Ｎｅｐｈｅｗ Ｐｕｂｌｉｃ Ｌｉｍｉｔｅｄ Ｃｏｍｐａｎｙ | Moisture display system |
| US10288590B2 (en) | 2013-10-08 | 2019-05-14 | Smith & Nephew Plc | PH indicator device and formulation |
| US10520446B2 (en) | 2014-07-10 | 2019-12-31 | Smith & Nephew Plc | Polymer materials |
| US10782238B2 (en) | 2014-07-10 | 2020-09-22 | Smith & Nephew Plc | Device including a polymeric material for detecting species and stimulus and method of using thereof |
| US11471076B2 (en) | 2016-01-14 | 2022-10-18 | Smith & Nephew Plc | Device and kit for indicating a pH at a locus |
| US11504033B2 (en) | 2016-01-14 | 2022-11-22 | Smith & Nephew Plc | Polymer materials |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3312438B2 (en) | 2002-08-05 |
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