Laundry Science

An automatic washing machine performs the following operations:
Soaking: Pre-wet clothes to loosen dirt.
Washing: Agitation or tumbling action with detergent to remove dirt.
Rinsing: Repeated rinsing to remove detergent and loosened dirt.
Spinning: High-speed spinning removes excess water.
Draining: Dirty water is automatically drained after each cycle.
Drying (in some models): Built-in dryer function to partially or fully dry clothes.

Hospital laundry has to maintain strict hygiene and efficiency. Key features include:
Segregation of Linen: Separation of infected and non-infected linen to prevent cross-contamination.
Use of Disinfectants: Special detergents and disinfectants are used to ensure sanitization.
High-Temperature Washing: Washing is done at high temperatures to kill pathogens.
Separate Workflow Areas: Distinct zones for dirty and clean linen to maintain hygiene.
Use of PPE by Staff: Staff handling infected linen wear gloves, masks, and gowns.
Efficient Drying and Ironing: Hot air dryers and steam ironing ensure both drying and additional disinfection.

When sorting clothes before washing, several important factors should be kept in mind to ensure the clothes are cleaned effectively while also maintaining their quality. These factors include:

1. Fabric Type: Clothes made from different fabrics (cotton, wool, synthetic, delicate fabrics) may require different washing conditions. For example, delicate fabrics like silk or lace should be washed separately and with gentle cycles, while sturdier fabrics like cotton can be washed together on a normal cycle.

2. Color: Sorting clothes based on color is essential to avoid color bleeding, which can ruin clothes. Dark-colored clothes should be washed with similar dark-colored garments, while light-colored clothes should be washed with other light colors to maintain the vibrancy of the fabrics. It is also recommended to wash new clothes separately, as they might release excess dye.
3. Degree of Soiling: Clothes with heavy stains or dirt should be sorted out from lightly soiled garments. Heavily soiled clothes may need pre-treatment before washing, such as soaking or using stain removers. Lightly soiled clothes can be washed together in a regular load.
4. Washing Instructions: Always check the care labels on clothes. Some garments may require cold water washing or a specific wash cycle, while others may need to be washed at a higher temperature. It is important to follow these instructions to avoid damage to the fabric.
5. Size and Weight of Clothes: It’s also important to consider the size and weight of the clothes. Large or heavy items, such as towels or blankets, may require a longer wash cycle and should be washed separately to avoid overloading the machine.
In summary, sorting clothes based on fabric type, color, degree of soiling, care instructions, and size helps achieve effective cleaning while preserving the fabric quality.