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Method for bleaching wood by hydrogen peroxide and ammonia water

A hydrogen peroxide and wood technology, applied in the field of wood bleaching, can solve the problems of time-consuming, unsatisfactory wood bleaching effect, complicated operation, etc.

Inactive Publication Date: 2015-01-21
苏雄孟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many methods suitable for bleaching paper and cloth, such as heating bleaching, fumigation bleaching with sulfur in a closed room, mixing several medicines together for bleaching, etc., but the effect is not very ideal for wood bleaching. And the operation is complex, labor-intensive and time-consuming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The method of using hydrogen peroxide and ammonia to bleach wood consists of the following steps:

[0018] ①Material preparation: 25% ammonia water, 30% hydrogen peroxide;

[0019] ②First brush 25%-28% ammonia water on the wood, let the ammonia water fully penetrate into the wood and react with the tannic acid chromophore group;

[0020] ③After 5 minutes, sprinkle with wood powder and wipe clean with emery cloth;

[0021] ④Then use a brush to apply 30% to 35% hydrogen peroxide, the wood slowly begins to turn white. After the bleaching treatment, it must be washed thoroughly with water and repeatedly wiped with a water-soaked emery cloth to fully wipe the bleached material clean;

[0022] The above concentration refers to the mass percentage concentration.

Embodiment 2

[0024] The method of using hydrogen peroxide and ammonia to bleach wood consists of the following steps:

[0025] ①Material preparation: 28% ammonia water, 35% hydrogen peroxide;

[0026] ②First brush 28% ammonia water on the wood, let the ammonia water fully penetrate into the wood and react with the tannic acid chromophore;

[0027] ③After 5 minutes, sprinkle with wood powder and wipe clean with emery cloth;

[0028] ④Then use a brush to apply 30% to 35% hydrogen peroxide, the wood slowly begins to turn white. After the bleaching treatment, it must be washed thoroughly with water and repeatedly wiped with a water-soaked emery cloth to fully wipe the bleached material clean;

[0029] The above concentration refers to the mass percentage concentration.

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PUM

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Abstract

The invention discloses a method for bleaching wood by hydrogen peroxide and ammonia water. The method includes: (1) preparing materials: 25%-28% ammonia water and 30%-35% hydrogen peroxide; (2) firstly brushing the 25%-28% ammonia water on wood, and letting the ammonia water fully permeate into the wood to react with a tannic acid chromophoric group; (3) 5min later, sprinkling wood meal and performing wiping with an abrasive cloth; and (4) then brushing the 30%-35% hydrogen peroxide on wood, making the wood start to whiten, conducting complete rinsing after bleaching treatment, performing wiping repeatedly with an immersed abrasive cloth, and fully wiping clean the materials from the bleaching treatment. By successive use of ammonia water and hydrogen peroxide, the method can achieve a very ideal wood bleaching effect, is easy to operate, and does not consume labor or time.

Description

Technical field [0001] The invention relates to a method for bleaching wood, especially a method for bleaching wood with hydrogen peroxide and ammonia. Background technique [0002] After wood is eroded by discoloring bacteria and mold, the original color has changed. This color change is called discoloration. After the discoloration fungus or mold invades the wood, it takes in the nutrients in the wood cell cavity, but does not decompose the material of the cell wall, and can only cause discoloration during all its activities. The common sapwood becomes blue-gray, called green change. There are also reddish brown spots on the wood caused by chromophores, called erythema; there are also variegated spots called mottle. [0003] These spots on the wood surface will bring uneven color to the coating. Especially when it is painted into a light-colored transparent color, the decorative performance of the surface of the wood product will be reduced, so this kind of wood is not suitabl...

Claims

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Application Information

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IPC IPC(8): B27K5/02
CPCB27K5/02
Inventor 苏雄孟
Owner 苏雄孟