1、Purchase of carpets---
　　The carpet purchased should conform to the size of the floor, and its colors and properties should conform to the ocasion.
　　Usually a passageway need anti-soil and abrasion-proof carpets and a parlor need soft, splendid chemical fiber carpets or wool carpets. Generally speaking carpet quality is decided by sorts of textile fiber, quantity, density and height of knops. Silk and wool are best in comprehensive performance. Denser are the knops, better is performance of the carpet. In China the knop density index of knotted carpets is number of warps per foot. High grade carpets have an index above 90. They are soft and but not easy to be cleaned. In addition high-quality carpets have even surface and uniform thickness, rehabilitate after being pressed and their back lining should stick to the carpets fast. You should choose a proper price. Manual knitted wool carpets are expensive and chemical fiber carpets are cheap.

2、 Maintenance of carpets---
　　After carpets are laid, they must be maintained regularly to keep clean and reduce abrasion. Dirts on carpets are mainly two classes: 1.dusts and granular matters; 2. oil and other chemical dirts. The former can be solved by regular dust arresting or washing and the latter must be solved by chemical solvents under guide of professionals. On the latter occasion, if improper methods are adopted, the smears may expand, so you must be cautious.
　　Problems in usage：
　1： New open knop carpets will produce slight fallen floss, a normal phenomenon.
　2： Beware of scraping of sharp tools and burning of cigarette stubs.
　3： Carpets have passed antimoth process in factory so they needn't antimoth agents which are harmful to people and carpets.
　4： Smears should be cleaned in time because they would be harder to clean after a time.
　5： After washing knops of the carpet should be arranged in the same direction or else the carpet won't keep its appearance after being dried.
　6： Dust wiping rugs should be set at the doorway to avoid dusts are brought onto the carpet area.
　　Washing of carpets：
　Partial or complete washing is arranged according to pollution extent.
　Partial washing：used against small smears or area susceptible to pollution. It includes several methods：
　1： Put detergent or spray water onto the carpet, rub it with towel then absorb water with a dry towel；
　2： Sprinkle cleaning powder onto the carpet, scrub it with a brush, then catch the powder；
　3： Eject concocted washing liquid onto the carpet, then perform vacuum dust suction with cleaner with sprayer and vacuum dust suction.
　Complete washing：to keep cleanness and appearance, regular complete washing should be performed. But times of complete washing should be too many.

3、 Processing of smears---
Water soluble smears
Tea: first scrub with water then with alcohol.
Coffee and black tea: infuse warm water to smears then absorb water with a towel.
Cola and fruit juice: scrub with neutral washing agent mixed with water.
Beer and spirits: scrub with warm water.
Soy sauce and ketchup: absorb them and then scrub with neutral washing agent.
Oil soluble smears
Cosmetic ointment, lipstick, shoe cream, inkpad, machine oil, edible oil, cream: （1）scrape the smear with a knife, then soak out the smear with washing oil, at last wipe with water mixed with neutral detergent （2）soak the smear out with oil soluble detergent.
Versatile pen（marking oil pen）: first wipe with diluent, then wipe with warm water mixed with neutral detergent.
painting oil, oil paint: soften it with turpentine，adhibit blotter onto it，iron it, then wipe it with alcohol, at last wipe it with warm water.
Chewing gum:（1）rub it to a ball and remove it, then wipe with alcohol or gasoline （2）solidify it with chew gum detergent then remove it.
Iron rust: remove with rust detergent.
Caligraphy ink: mix baking soda and rice bran，apply them on the smear, then wipe with neutral detergent.
Blood: add a half litre salt water into a litre water, apply the solution on the smear, then wipe with clear water.
Urine: （1）wipe with salt water （2）wipe with boric acid solution （3）wipe with mixture of alcohol and acetic acid. In any of the 3 methods, wipe it with water mixed with neutral detergent at last.