Sounds like you fall into the basic hygiene category
This category applies to packaging manufacturers producing packaging for products that are less vulnerable to hygiene risk.
Packaging that will be used for a product that is already in an impermeable pack:
• labels used for any product in plastic/glass jars or metal cans
• corrugated case for film over wrapped biscuits where the case is filled in a different area to the biscuit wrapping.
This means the laundry of clothing is not addressed in the requirements, you need to ensure that they are 'clean' . BRC basic hygiene requirements are:
6.4 PROTECTIVE CLOTHING
Appropriate protective clothing shall be worn in production and storage areas to minimise the risk of product contamination.
The risk of product contamination from clothing, hair or personal items shall be minimised.
6.4.1 Hazard and risk principles shall be used to determine the need for protective clothing, including garments and footwear in raw materials handling, preparation, production and storage areas.
Where no need for protective clothing has been established by risk assessment, it shall be fully justified and shall not pose a contamination risk to the product.
6.4.2 The company shall use risk assessment to determine, document and communicate to all employees, including temporary personnel and contractors, the rules regarding:
• the wearing of protective clothing on the journey to work
• the wearing of protective clothing in raw materials handling, preparation, production and storage areas
• the wearing of protective clothing away from the production environment (e.g. removal before entering toilets, canteen or smoking areas).
6.4.3 Where protective clothing is used it shall be kept adequately clean. Changes of clothing shall be available as required.
6.4.4 Where protective clothing is used, clean and dirty clothing shall be segregated and controlled to prevent cross-contamination.
6.4.5 Disposable protective clothing, if used, shall be subject to adequate control to avoid product contamination.