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Litmus test paper strip

A technology of litmus paper and test paper, which is applied in the direction of analysis by chemical reaction of materials and material analysis by observing the influence on chemical indicators, can solve problems such as troublesome, difficult to play an intuitive effect, etc. Convenient, easy to distinguish intuitively, and display the effect of obvious color

Inactive Publication Date: 2015-04-29
周维保
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the litmus test paper in the middle school laboratory is a single multiple test paper sticking together to form a book, and tearing one by one for use in the experiment, which is not only troublesome but also difficult to achieve an intuitive effect

Method used

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  • Litmus test paper strip

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Embodiment Construction

[0008] The purpose of the present invention is to provide a kind of litmus test paper card that is easy to use, obvious in effect and convenient to compare experimental results for middle school laboratories.

[0009] The invention consists of two parts, litmus paper (2) and card frame (3). The card frame is a double layer of hard paper with an open space in the middle. There are several litmus test paper strips in the open space, and the red and blue ones are placed alternately. Both ends of the litmus strip are glued in the interlayer of the card frame. There is an equal space between each test strip (1).

[0010] The positive effect of the present invention is that when doing acid-base-salt experiment, the display color is obvious, which is convenient for visual distinction. Its advantages are easy operation and convenient use.

[0011] When in use, take out a piece of litmus test paper card, the acid solution to be tested will turn red when it is dripped on the blue te...

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PUM

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Abstract

The invention aims at providing a litmus test paper strip which is easy to use, obvious in effect and convenient in comparison of experimental results for a middle-school libratory. According to the technical scheme, the litmus test paper strip is composed of two parts, namely a plurality of pieces of litmus test paper (2) and a clamping frame (3), wherein the clamping frame is a double-layer hard paper sheet and is hollow in the middle; a plurality of pieces of litmus test paper are arranged at the hollow part in a red-blue alternate way, and the two ends of each piece of litmus test paper are respectively bonded in a sandwich layer of the clamping frame; and gaps are reserved among a plurality of pieces of litmus test paper at equal intervals. The litmus test paper strip has the positive effects that display colour is obvious and visual distinguishing is convenient when an acid-alkali-salt experiment is carried out; and the litmus test paper strip has the advantages of easiness in operation and convenience in application.

Description

technical field [0001] The invention relates to the field of teaching equipment, in particular to middle school chemical experiment supplies---litmus test paper card. Background technique [0002] At present, the litmus test paper in the middle school laboratory is a single multiple test paper sticking together to form a book, and tearing one by one for use in the experiment, which is not only troublesome but also difficult to achieve an intuitive effect. Contents of the invention [0003] The purpose of the present invention is to provide a kind of litmus test paper card that is easy to use, obvious in effect and convenient to compare experimental results for middle school laboratories. [0004] For realizing above-mentioned object, the technical scheme that the present invention takes is: [0005] The invention consists of two parts, litmus paper (2) and card frame (3). The card frame is a double layer of hard paper with an open space in the middle. There are several ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/80
Inventor 周维保
Owner 周维保
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