Ancient books, as the name suggests, refer to ancient books. It is an important cultural heritage of our country. The precious wealth of mankind has important historical and cultural values ​​and needs to be preserved forever. However, with the passage of time, under the influence of factors such as nature and man-made, the ancient books will gradually deteriorate and be damaged, which will lead to the inability to use and will cause great losses to human culture. The task of ancient book protection is to study the causes of damage, find scientific methods of protection, and extend their life.
(1) The effect of temperature and humidity
1. Temperature?
high temperature
If the temperature of the library is too high, the writing with poor heat resistance will spread; it is beneficial to the growth and reproduction of harmful organisms. The life activities of each microorganism have a certain temperature range. If it exceeds this range, the growth will be slow or stop; Accelerate the destructive effects of various harmful chemical impurities in ancient paper materials. In general, the higher the temperature, the faster the chemical reaction proceeds. ? Low temperature and low temperature will cause the water in the paper to freeze, causing its internal structure to be destroyed, so that the strength is reduced, so the warehouse temperature should not be lower than zero.
2, humidity?
moist
The moisture in the warehouse will accelerate the hydrolysis of cellulose in ancient paper materials, and the strength of the paper will decrease; the humidity will make the handwriting of poor tolerance fade and fade; it is conducive to the growth and reproduction of ancient books. The survival and metabolism of microorganisms that endanger ancient books are inseparable from water. These waters mainly come from the water in ancient papers, and the water content of paper is affected by the humidity of the warehouse air. Generally speaking, whether it is a mold or a pest that jeopardizes ancient books, the most suitable wet area required by them is about 70%; the moisture in the warehouse will also promote the destruction of harmful materials such as air and dust in the air. ?
dry
If the humidity is too low, the moisture in the paper will be excessively evaporated and the normal water content will not be maintained. The internal structure of the fiber will be destroyed, and the paper fiber will become hard and brittle, and the strength will inevitably fall.
(2) Environmental temperature and humidity requirements for ancient books collection
Ancient books special library temperature: 16 ° C - 22 ° C; relative humidity: 45% - 60%. In order to maximize the preservation life of ancient books, the temperature and humidity of the ancient books collection library should be stable, the temperature difference should not be greater than 2 °C, and the relative humidity should not be more than 5%.
(3) Determination of temperature and humidity
There are relative instruments for measuring temperature and humidity, such as moisture meter, liquid thermometer, resistance thermometer, ordinary dry and wet bulb thermometer. Through the measurement to grasp the law of temperature and humidity changes inside and outside the library, in order to take the initiative to take measures to control and regulate the temperature and humidity in the library. Master the favorable timing of ventilation and dehumidification, check the effect of controlling and regulating the temperature and humidity of the warehouse.
(4) Prevention and control of environmental factors damaged by ancient books
1. Sealed
The function of sealing is to prevent or reduce the influence of unsuitable temperature and humidity on the inside of the library, so as to keep the suitable temperature and humidity in the library as relatively stable as possible. The focus of the confinement of the warehouse is the sealing of the doors and windows, and the permanent doors and windows of the warehouse should be permanently sealed. However, the sealing has only the function of control and has no regulating effect, so it must be combined with ventilation and other measures to adjust the temperature and humidity of the warehouse.
2, ventilation
Ventilation is based on the law of air flow, and the air inside and outside the warehouse is planned to be exchanged, so as to adjust the temperature and humidity in the warehouse. Ventilation is also a cost-effective, easy-to-use measure to regulate temperature and humidity in the warehouse. When ventilating, care should be taken to prevent dust and harmful gases from entering the warehouse; after ventilation, it should be sealed immediately so that the proper temperature and humidity conditions in the warehouse can be stabilized for a long time.
3, anti-light
Light is an electromagnetic wave radiated from an illuminant, which propagates in a manner of fluctuating at a high frequency. Light directly destroys the cellulose in the paper, causing the mechanical strength of the paper to drop. A certain wavelength of light has the energy to destroy cellulose. The shorter the wavelength, the greater the energy and the greater the damage capacity. Under the action of light, the oxidation of paper cellulose will be accelerated; the light destroys the non-cellulose in the paper. If the paper contains more lignin, the lignin will become oxidized lignin in a short time after illumination; It can also fade some of the characters. From the light source, the light has natural light and artificial light. ? Natural light protection measures Light limiting is to limit their radiation intensity to ancient books within the allowable illuminance value. It is not advisable to have windows in the east and west of the general warehouse, and the area of ​​the windows should be appropriately reduced to take shading measures.
High-precision books and periodicals ancient books scanner OS14000TT
description:
The latest generation of book scanners from the company that uses projected, non-glare cold light source technology is suitable for all books, archives, maps and various drawings that need to be scanned. The low-brightness light source provides extreme protection for valuable books and archives, and the high-precision true color scanning lens perfectly reproduces the real details of the original. The user-friendly design of the number of games provides users with a safe, reliable and ergonomic operating environment.
The main parameters:
u Scanner type: A2 color scanner
u Scanner Description: Top-mounted dual-scan head, desktop non-contact scanning, suitable for cultural relics, ancient books, books, newspapers, calligraphy and paintings, maps, etc.
u original size: 635 × 460 mm (super A2)
u scanning speed: 3.5 seconds / page (A2, color, 300dpi
4.0 seconds / page (A2, color, 400dpi)
6.0 seconds / page (A2, color, 600dpi)
u resolution: 600dpi
u scan mode: linear CCD progressive scan, 36-bit color linear CCD input, 24-bit output; 12-bit grayscale and 1-bit black-and-white binary output
u Original thickness: The maximum thickness of the book is 150 mm
u Scanning platen: connected manuscript table, 90 degree opening and closing electric pressure glass
u Scanning mode: high resolution, high precision scanning lens, 8 line pairs / mm, no distortion, depth of field up to 50 mm / 2 inches. The dual-lens imaging principle captures both planar and stereoscopic images. Scan from back to front.
u image transmission interface: dual IEEE1394 FireWire interface
u Light source: It is a bright LED light source with no uv/IR radiation, which is extremely resistant to external light source interference.
u Image format: TIFF is not compressed, TIFF G4, JPEG, JP2, PDF, multi-page TIFF, BNMP, PCS
u OS12 scanning software basic module: scan, store, browse, and output black and white, color, grayscale
u scanning principle: dual lens imaging principle, dual imaging system, simultaneous linear CCD scanning and rotational imaging, while avoiding Moire fringe interference using a back-and-forward scanning method, linear CCD to obtain scanning plane image, 3D camera to obtain books The 3D image, the hardware superimposes the two images, which is very convenient for automatic correction, deformation correction of text and lines on both sides of the middle seam, automatic spine bending correction, automatic recognition of book outline, and automatic page separation to automatically remove finger images. It is especially suitable for books and archives that are not to be dismantled.
u device uses built-in PC mode, you can also connect directly to the computer
u Optional V-type scanning platen accessories
OS12 random software features:
u OS12 scanning software basic module: scan, save, browse, and output black and white, color, grayscale
u PerfectBook book scan: unique 3D book curve correction technology, automatic recognition page size, automatic segmentation, curve correction, deskew, double scan head 3D surface correction, black edge, blanking, sharpening, finger deletion
u IMAGING KIT Image Kit: Work Management, Multiple Ways of Masking, Automatic Masking, Automatic Segmentation, Shearing, Correction, Black Edge, Sharpening, Smoothing
u simulation copy data management
u color characteristics ICC file management
Interactive conference teaching touch all-in-one machine, integrating Windows and Android dual systems, injecting AI elements, focusing on multiple human interactions, display, movement, and interaction usher in a new smart classroom and smart conference, widely used in multimedia teaching And meeting scenes.
Our factory has a professional interactive whiteboard R&D team, has Conference Interactive Whiteboard, Teaching Interactive Whiteboard, conference all-in-one machine and interactive smart board full production line of products, and the products sell well at home and abroad.
Conference Interactive Whiteboard,Teaching Interactive Whiteboard,Conference All-In-One Machine,Interactive Smart Board
Guangdong Zecheng Intelligent Technology Co., Ltd , https://www.zecheng-security.com