The process for cosmetics contract manufacturers to develop and confirm samples is typically as follows:

1. Requirements Communication: The client and the cosmetics manufacturer communicate their needs to clarify the product's formula, specifications, packaging requirements, brand positioning, and more. This communication can occur in meetings, emails, or phone calls.

2. Sample Development: The cosmetics manufacturer develops samples based on the client's needs and requirements. Depending on the client's brand image and market positioning, the manufacturer may provide multiple sample options for the client to choose and compare.

3. Sample Submission: The cosmetics manufacturer submits the developed samples to the client. Samples typically include the actual product, packaging samples, and quality inspection reports.

4. Customer Evaluation: The client evaluates and tests the received samples. The client may conduct visual inspections, texture evaluations, and scent assessments to ensure the samples meet their expectations.

5. Feedback and Revision: If the client has any feedback or suggestions for revisions regarding the samples, the cosmetics manufacturer will adjust and modify the samples based on the feedback until they meet the client's requirements.

6. Sample Confirmation: After multiple rounds of feedback and revisions, once the client is satisfied with the samples and confirms they are correct, the contract manufacturer will reach an agreement with the client to confirm the samples.

7. Contract Signing: After sample confirmation, both parties will further discuss the details of the collaboration, including contract terms, order quantity, price, and more, and sign a formal contract.

8. Mass Production: After sample confirmation, the cosmetics manufacturer will proceed with mass production according to the customer's order requirements, ensuring that the finished product is consistent with the confirmed sample.

The entire sample development and confirmation process requires active communication and cooperation between both parties to ensure that the product meets the customer's expectations. Furthermore, the cosmetics manufacturer must fully consider the customer's brand image and market needs during sample development and production to provide customers with satisfactory OEM services.