3-Step Dry Cleaning Stain Removal: Pre-Treatment, Pre-Stain Removal & Post-Stain Removal

In the daily operation of a laundry shop, stain removal of clothes is the crucial link in calibrating the level of skills. The stain removal treatment during the dry cleaning process is a systematic and defined process, which is generally divided into three steps: pre-treatment, pre-stain removal, and post-stain removal. Understanding and doing these three steps can improve washing cleanliness and ensure clothes' safety.

Pre-treatment

Pretreatment is the primary treatment before the clothes enter the dry cleaning machine. Its core aim is to prevent the stains from solidifying during the dry cleaning process and help the dry cleaning solvents remove the heavy dirt and water-based stains. 

● Why is it important?

Dry cleaning solvents (tetrachloroethylene or hydrocarbon solvents) have good solubility for oil-based stains, but their ability to remove water-based stains (sugar stains, sweat stains, some fruit juices) is poor. Without pre-treatment, these water-based stains may undergo chemical reactions and be fixed if they are heated in the dry cleaning machine. This may cause a permanent residue.

● Operation procedure

Use a professional dry cleaning pre-treatment agent (usually containing dry cleaning soap oil and a small amount of water-based solvent) → apply it by dotting or spraying on heavily soiled areas → let it stand for a moment → the agent will fully penetrate and decompose the stains → lays the groundwork for machine washing.

Pre-stain removal

Pre-stain removal is the targeted treatment for special stubborn stains on the basis of pre-treatment. It happened before dry cleaning, so the operation needs carefulness.

● Operating principles

- Don’t worry about watermarks

The following dry cleaning process will completely remove moisture. 

- Prevent using strong corrosive solvents 

Rust removers, strong bleaches... 

These chemicals have a strong and uncontrollable effect. More importantly, they cannot be thoroughly rinsed off in the dry cleaning machine. The residual chemicals may damage the fabric fibers or cause the clothes to fade.

- Strictly control water

For silk, wool, and other high-end, delicate textiles that are sensitive to water, even local stain removal should avoid using a lot of water to prevent damage to the textiles’ structure, shrinkage, or wrinkling.

Post-stain removal

Post-wash stain removal is the final check and treatment after the clothes finish dry cleaning and drying. This is the last chance to remove residual stains and the most technically demanding step.

● Why is it indispensable?

After dry cleaning, most stains have been removed, but there may be a little extremely stubborn stain residue. At this time, the clothes are in a clean and dry state, which is convenient for operators to clearly identify every stain.

● Operation advantages and challenges

- Wider range of stain removers

Theoretically speaking, any stain removers can be used because the clothes don’t need to enter the dry cleaning machines again. (Fabric materials and color fastness should be strictly considered.) Operators can use more professional chemicals and techniques ( local application of oxidative/reductive bleaches, protein solvents...)

- Technology and experience are the key

The biggest challenge of post-stain removal is that operators must ensure the stain removal area has no residual watermarks after drying. This requires the operators to precisely control the dosage of stain remover and be proficient in using auxiliary equipment (steam and compressed air) for rapid neutralization and drying, which is a big test of both technical proficiency and patience.

Conclusion

The division of pre-treatment, pre-stain removal, and post-stain removal shows the professionalism and refinement of the modern laundry services. A set of rigorous stain removal processes can not only improve the washing rate but also ensure the safety of the clothes as much as possible and avoid laundry accidents. For laundry shops, investing in professional technological training for employees and establishing standardized stain removal operation procedures are the core strategies for improving service quality and standing out in the fierce competition. Remember, every stain that is successfully removed is the cornerstone for winning the long-term trust of customers.