CN1224162A - Pencil tester for testing pH value of paper - Google Patents
Pencil tester for testing pH value of paper Download PDFInfo
- Publication number
- CN1224162A CN1224162A CN 98117405 CN98117405A CN1224162A CN 1224162 A CN1224162 A CN 1224162A CN 98117405 CN98117405 CN 98117405 CN 98117405 A CN98117405 A CN 98117405A CN 1224162 A CN1224162 A CN 1224162A
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- paper
- value
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- test
- testing
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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
A test pen for detecting the pH value of paper to determine the acidic decay of books and paper archives features that alkaline bromocresol green as indicator is filled into fountain pen and the fountain pen is used to write on the paper. the acidic matter contained in paper or generated by acidic decay can change its colour, so attaining the test purpose. Its advantages are easy operation, simple structure and quick, correct and sensitive test.
Description
The present invention relates to the pH value inspection test pen that a kind of not damaged detects paper archives, books souring decay degree, it is characterized in that in pen, pouring into certain density alkaline bromine cresols green solution.
Test paper acidifying decay degree generally adopts solution extraction to measure its pH value, acidity, but these mensuration all belong to destructive testing, will influence archives and documents and materials integrality.Present domestic other other method of testing of also not finding.
The objective of the invention is to provide a kind of pH value inspection test pen, it can be effectively, the acidity intensity of variation of not damaged, high precision, wide region, large scale test books, paper archives.
The object of the present invention is achieved like this: bromcresol green is dissolved in the 0.1N sodium hydroxide solution of 1/20～1/5 (V-/V), makes the solution of concentration 0.075%～0.20% (W/V), pour in the water-color paintbrush, can use.
When measuring stationery archives and documents and materials, will try pen and not have writing place stroke gently at the archives edge, and put a moment slightly, liquid medicine contrasts with Standard colour board after infiltrating, and reads the pH value of measured object.
The present invention detects so can carry out not damaged to paper archives, books because its indicator prescription is unique, and sensitivity, precision height; Simultaneously because its volume is little, simple in structure, thus easy and simple to handle during test, be easy to carry out on a large scale, detect at any time.
The principle that the present invention uses acid-base neutralization detects, and the acidic materials generation neutralization reaction that the solvent NaOH of dissolving bromcresol green and paper decay come out makes the indicator bromcresol green demonstrate different colors according to the degree that neutralizes.The pH value measurement range of test paper is between 4.5～7.5, and its precision has reached the level of combination electrode pH meter.
Claims (3)
1, a kind ofly is suitable for the pH value examination extensive, that not damaged detects books, paper souring decay situation, it is characterized in that in water-color paintbrush, pouring into certain density alkaline bromine cresols green solution.
2, examination pen according to claim 1 is characterized in that it has the structure of acid-base neutralization variable color.
3,, it is characterized in that 0.075%～0.20% (W/V) bromcresol green alkalescence dip-coating solution in the 0.1N NaOH of 1/20～1/5 (V/V) is made according to claim 1 described examination pen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98117405 CN1224162A (en) | 1998-08-19 | 1998-08-19 | Pencil tester for testing pH value of paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98117405 CN1224162A (en) | 1998-08-19 | 1998-08-19 | Pencil tester for testing pH value of paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1224162A true CN1224162A (en) | 1999-07-28 |
Family
ID=5225507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98117405 Pending CN1224162A (en) | 1998-08-19 | 1998-08-19 | Pencil tester for testing pH value of paper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1224162A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393135B (en) * | 2008-11-10 | 2010-09-08 | 国家图书馆 | Paper ph detection pen and detection method thereof |
| WO2020055366A3 (en) * | 2018-09-10 | 2020-05-07 | Firat Universitesi Rektorlugu | Halochromic gel tip pen and production method |
| CN113484117A (en) * | 2021-07-21 | 2021-10-08 | 杭州众材科技股份有限公司 | Method for nondestructive acid measurement on surface of paper cultural relic |
| CN115015340A (en) * | 2022-04-28 | 2022-09-06 | 杭州众材科技股份有限公司 | Paper waterless pH detection method |
-
1998
- 1998-08-19 CN CN 98117405 patent/CN1224162A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393135B (en) * | 2008-11-10 | 2010-09-08 | 国家图书馆 | Paper ph detection pen and detection method thereof |
| WO2020055366A3 (en) * | 2018-09-10 | 2020-05-07 | Firat Universitesi Rektorlugu | Halochromic gel tip pen and production method |
| CN113484117A (en) * | 2021-07-21 | 2021-10-08 | 杭州众材科技股份有限公司 | Method for nondestructive acid measurement on surface of paper cultural relic |
| CN115015340A (en) * | 2022-04-28 | 2022-09-06 | 杭州众材科技股份有限公司 | Paper waterless pH detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |