Pretreatment is done before washing or cooking. Anything that takes place before either washing or cooking is considered a pretreatment.
Laundry pretreatment products will.
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in order to remove impurities in crude like salt, dirt and other corrosion agents pre treatment is done.
prophylaxis, immunizations and pretreatment
In order to remove an oil stain from clothing you pretreat the stain and then you wash the garment in hot water. Pretreatment involves blotting up as much of the stain as you can with a clean paper towel, and then following the directions on a commercial pretreatment. You can find pretreatments wherever you buy detergent, and the labels will let you know if they work best on a particular type of stain.
Start by removing as much of the stain as you can by scraping or blotting. Do not rub.If the stain is lipstick or eye-makeup, use a pretreatment. These can be found anywhere you buy detergent, and have directions on the back.After you've completed the pretreatment, or if the stain was caused by foundation, rub the stain with a bit of your liquid detergent. Rinse.Wash the clothing as you normally would.
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Eyeliner is a combination stain. Start by scraping off as much eyeliner as you can, and then pretreat it with the strongest pretreatment you have. Then rub the stain with liquid detergent and wash it.
Simply go back over the streaked areas with plain water/steam. This can happen when too much solution/pretreatment is used.
Watermelon, cantaloupe, and honeydew are more sticky than they are staining. The stains should wash away in hot water. If you are concerned, use a pretreatment before you put it in the wash.
Remove as much of the stain as you can by scraping.Spray with a pretreatment. See if you can find a dry-cleaning strength solvent, and use that.Rub the stain with liquid detergent and wash it as you normally would.
To clean cooking oil from car seats, talcum powder or cornstarch can be applied to the area and then brushed away. A laundry pretreatment can then be sprayed on the spot and washed with the hottest water.