2. When reading a book, washing your hands before reading will reduce the sweat or bacteria attached to the page, which will cause the page to be moldy and damaged for a long time. Sweat on the page changes color easily.
3. The place where books are collected should be kept ventilated and dry, and the indoor air should be dry, so that the pages of books will not absorb the water vapor in the air, making the books yellow and discolored, resulting in mildew spots, because books are originally bound by pages, and the paper is very easy to absorb water.
When the weather is fine, try to let the books bask in the sun. Sunlight can not only evaporate the enzyme moisture in the pages, but also kill the ultraviolet rays inside. This method is used by many people, and sunlight is the best sterilization desiccant.
5. Around the bookshelves of books, several packages of desiccant and mildew-proof tablets are placed, which can not only prevent mildew and moth, but also absorb water vapor in the air, thus protecting books.
6. Clean up the dust on the screen with a dry rag or feather duster in your spare time. On the one hand, the book is moldy and the pages are rotten. On the other hand, the dust in the air is caused by bacteria falling on it, so it is essential to remove the dust occasionally.
How to prevent the diploma from yellowing and mildew? Put it in a sealed bag and desiccant, away from damp places.
Hope to adopt, thank you.
How to deal with moldy black tea and loose tea? You can't drink it if it is moldy.
Generally, the shelf life of black tea is relatively short, generally 1 year, the shelf life of black tea picked twice and in autumn is 1-2 years, and the shelf life of Ceylon black tea is relatively long, more than two years.
The shelf life of bulk black tea is generally 18 months.
General storage method: A small amount of tea leaves are used in families, and it is generally customary to store them in iron colored tea pots, tin bottles, colored glass bottles and ceramic containers, among which iron colored tea pots and double-lid long-necked tin bottles are the best. When storing tea in ceramic containers, it is advisable to have a big mouth and a big belly. When putting tea leaves in the upper container, first check whether the container is airtight, and the tea leaves should be filled to minimize the air in the container. Although this method of storing tea leaves is simple and convenient to use, it is only suitable for short-term storage, usually several months, because it cannot be completely sealed.
(2) Using desiccant for storage: Using desiccant can extend the storage time of tea to about one year. The choice of desiccant depends on the convenience of tea and materials. To store green tea, you can use large pieces of deliquescent lime; Black tea and scented tea can be stored with dry charcoal; If conditions permit, color-changing silica gel can also be used.
When storing tea leaves with quicklime, the bulk tea leaves can be wrapped in thin kraft paper (several ounces to half a catty), tied tightly, and layered around a dry and tasteless jar or a rust-free and tasteless small-mouth iron drum. Put one or several bags of unweathered quicklime between the jar and the drum, and put several small bags of tea on it. Then, block the jar or drum mouth with kraft paper and cotton pad, cover the lid tightly and store it in a dry place. Generally, change the lime every 1-2 months. As long as lime is changed on time, tea leaves will not absorb moisture and deteriorate. Charcoal tea storage method, similar to quicklime method, is not repeated here.
The moisture-proof effect of tea storage with color-changing silica gel desiccant is better. Its storage method is similar to quicklime and charcoal, but this method is more effective. Generally, after being stored for half a year, the tea leaves remain fresh. Color-changing silicone rubber is blue before moisture absorption. When the desiccant particles change from blue to translucent pink, it means that the absorbed water has reached saturation. At this time, it must be taken out, baked or dried with low fire until it returns to its original color before it can be put into use again.
(3) Refrigerator preservation method: put it in the refrigerator for low temperature preservation. If the temperature is controlled below 5℃, the quality of stored tea is better, and the flavor of tea can be kept unchanged for more than 1 year. If it is always packed in small cans, cans, barrels and boxes, it is generally airtight. As long as it is wrapped in a clean plastic bag, it can be stored directly in the refrigerator. For bulk tea, you can first put it into a clean, clean and tasteless brown bottle or tin can or cylinder, fill it with solid material, cover it tightly, seal it with adhesive tape and wax melting coating, then put a plastic bag on the outside and tie it tightly, and then put it in the refrigerator for storage.
(4) Vacuum flask storage method: Both vacuum flask and vacuum flask with good heat preservation efficiency can be used to store tea, with good effect, and generally can keep the color and fragrance of tea 1 year. Put the tea in bulk into a new thermos or thermos, which should be full, try to reduce the air retention in the bottle, cover it tightly with a cork and seal it with white wax.
(5) Food bag storage method: Use two new odorless and nonporous plastic food bags, wrap the dried tea leaves with moisture-proof paper, put them into one bag, squeeze gently, exhaust the air in the bag as much as possible, tie the bag mouth tightly, then put the seal down, put it into another plastic bag, remove the air and tie the bag mouth tightly. This kind of packaging can also play a certain fresh-keeping effect if it is stored separately. If stored in a dry and odorless closed iron cylinder, the effect and duration of tea preservation will be longer and better.
Tin bottles, porcelain pots and colored glass bottles are the best containers for storing tea. Secondly, tin cans, wooden cases and bamboo boxes should be used, and bamboo boxes should not be used in the dry north. Plastic bags and cartons are the worst. The container for storing tea leaves should be dry, clean and free of peculiar smell. Good tea should be placed in a dry and ventilated place, not in a damp, high temperature, unclean or exposed place. There should be no irritating items such as camphor, medicine, cosmetics, cigarettes and washing products in the place where tea leaves are stored. It should also be noted that different kinds and grades of tea cannot be stored together, and quicklime cannot be used as a moisture absorbent.
How to save asparagus from turning yellow? Asparagus, as a potted plant with high ornamental value, can be cultivated in soil or water, and it is a favorite plant of many people. Especially put a small pot of asparagus next to the coffee table, and the mood of drinking tea instantly becomes better.
However, if asparagus is not well cultivated, its leaves will turn yellow and its beauty will be lost instantly. What should we do at this time?
First of all, we must analyze the reasons. Is it because the light is too strong? If it is under strong light, it will cause the leaves of asparagus to turn yellow. In this case, it is necessary to transfer the asparagus to the shade, give it to Jiang Wen, and spray some water on the leaves.
Too much watering can also make asparagus leaves yellow. Be sure to wait for the soil to dry before pouring it thoroughly. This is the best way.
In addition, asparagus should grow at room temperature and not be frostbitten.
Finally, fertilization and insect pests can also harm asparagus. Fertilization should not be excessive. If fertilizer is added, change the pots immediately and use drugs regularly to kill insects.
How to save the moldy surface of zinc alloy;
1, from the perspective of material die-casting: if the material die-casting is not good, there will be more loose holes, which will hide the liquid medicine during the electroplating process. When the electroplating is finished, the hidden liquid medicine will slowly seep out and produce white spots, which is called mildew spots. At this time, it is required that the pH value of pretreated liquid medicine such as wax removal water should not be too high and the ultrasonic power should not be too high;
2. Copper acid has good filling property: when the zinc alloy material is slightly poor, we have to rely on copper acid to fill, and copper acid can fill some small holes;
3. Before adding acidic copper, the backing copper must be thick enough to prevent the corrosion of acidic copper liquid. If necessary, you can also consider adding coke copper as insurance.
4, the sulfur content of light nickel should be low, and the decomposition products should be less;
5, chromium plating should be positioned well, and there should be no cracks;
6. Thoroughly clean after chromium plating;
7. Dry after chrome plating to keep the oven clean;
8. The storage environment should be kept dry.
Hope to adopt
How can a pink nylon coat save you if it turns yellow after sun exposure? It is best to use the muddy water of rice washing at home, that is, thick white, add half a spoonful of white vinegar to a large basin, then soak all the coats, rinse them after half an hour and dry them. Repeatedly, the original brightness can be restored.
How to save asparagus with yellow leaves?
asparagus
Asparagus of Liliaceae
Alias: asparagus planing grass Yunzhu Yunzhu thorn asparagus
How to cultivate asparagus;
(a) How do we grow asparagus?
Asparagus likes warm, ventilated, semi-cloudy and semi-humid environment, is not cold-resistant, and avoids direct sunlight. Suitable for growing in sandy soil with rich humus and good drainage.
The key to asparagus cultivation is watering. Too much watering and too wet pot soil can easily lead to root rot and yellow leaves falling off; Too little watering and too dry pot soil can easily lead to yellowing and scorching. Therefore, watering usually depends on the weather, growth and soil conditions. Don't do it right, pour it completely. You can't water "half water", that is, watering only wets the soil surface, and the soil in the basin is still dry.
When asparagus is hot and dry, spray water to humidify and cool down. Water less in winter and keep the room temperature above 5 degrees.
Asparagus is afraid of smoke and dust, and the place should be ventilated.
(2) The reason why asparagus leaves turn yellow:
(1) Too strong light and direct sunlight can easily cause the leaves to turn yellow.
(2) Improper watering Asparagus likes humidity but is afraid of waterlogging, so it should be cultivated in breathable and permeable sandy soil.
(3) Asparagus doesn't like fertilizer if it is not fertilized for a long time, and it is easy to peel if it is fertilized for a long time, but it will also cause insufficient nutrients. Should be watered once every half month, pay attention to watering and loosening the soil in time after fertilization.
(4) Improper fertilization, such as applying original fertilizer or excessive fertilization, will make the leaves fall off. At this time, the basin soil should be washed and diluted with water in time, or the soil should be changed immediately for preservation.
(5) The winter pipeline with poor winter should be placed in a sunny place indoors, and the room temperature should be kept within 8- 12 degrees. Long-term shady, room temperature below 8 degrees, will lead to yellowing of leaves.
(6) Asparagus polluted by smoke is most afraid of smoke and harmful gases, so it should be maintained in a place with good air circulation to avoid pollution. You should also spray water on the leaves to wash away the dust.
(3) How to control the growth height of asparagus?
Asparagus leaves are soft, branches are like bamboo, and its posture is elegant and natural, which is deeply loved by people. But potted asparagus is lower. With the increase of asparagus growing years, it sometimes grows taller, becomes bare and loses its elegance. In the peak season of asparagus growth in spring, when you see that the new buds are too thick, you cut them off, and the new buds will be smaller. Every time I cut them, they will get smaller until I am satisfied. In this way, I can control the growth height of plants and always keep their beauty.
Insufficient light, too much watering, soil hardening, too close to the roots and too much fertilization will all lead to the yellowing of asparagus leaves.
The soil surface layer can be loosened by 2-4 cm, the yellow leaves can be trimmed, and the water can be controlled to make up the light, and the vitality can be restored in about 10 days.