How to find a suitable foundry for liquid foundation products? Key points of investigation and analysis of cooperation process

For cosmetics brands, choosing a suitable liquid foundation substitute factory is directly related to product quality and market reputation. The formula of liquid foundation is complex, involving many links such as toner dispersion, emulsification system, skin feeling adjustment, etc., which has specific requirements for the technical capacity of the factory. The following outlines a feasible operational framework from the perspectives of assessment and collaboration processes.

1、 Five dimensions for evaluating contract factories

1. Qualification and compliance review

Check the production license of the factory to confirm that the scope of its license includes the category of "liquid unit" or "liquid foundation". Simultaneously verify the approval of environmental impact assessment, pollutant discharge permit and other documents to ensure that the production process meets environmental protection requirements. Request the factory to provide a production workshop cleanliness report issued by a third-party testing agency within the past year, with a focus on data on air settling bacteria and suspended particles in the filling room.

2. Production site and equipment configuration

When visiting the workshop on site, observe whether the material flow follows the physical isolation principle of "personnel semi-finished products finished products packaging materials". The production of liquid foundation has specific requirements for the equipment: the shearing speed of the homogenizing emulsification machine should meet the demand for pigment dispersion; The presence or absence of grinding equipment (such as three roll machines or ball mills) can affect the fineness of the powder and batch stability. In addition, stainless steel reaction vessels need to have heating and cooling jackets to adapt to different emulsification process temperatures.

3. Quality management system documents

Refer to the factory's standard operating procedures (SOP) and quality control plan. For example, whether the viscosity, pH value, centrifugal stability and other items of each batch of liquid foundation are tested online before filling; Should we keep the color palette or standard sample for color comparison. Review recent batch production and inspection records, and pay attention to the handling methods for abnormal situations (such as material layering and color deviation exceeding the internal control range).

4. Sample and trial production capability

The factory is required to provide samples of liquid foundation (not limited to brand private models) produced in the past, and pass the simple laboratory test: put the samples in an oven at 48 ° C and a refrigerator at -15 ° C for one week respectively, and observe whether there is demulsification, caking or water separation. At the same time, a third party can be commissioned to conduct microbial limit and anti-corrosion challenge tests on the samples. If conditions permit, arrange a small batch trial production (such as 10-20 kilograms) to assess the factory's on-site control ability over key parameters such as feeding accuracy, homogenization time, and cooling rate.

5. Capacity and cooperation flexibility

Obtain the production schedule of the factory for the past three months and confirm its equipment utilization rate. For small and medium-sized brands, it is recommended to choose factories with divisible production lines and a minimum order quantity of 500 kilograms or less. At the same time, understand the factory's inventory of raw materials (such as commonly used color powders, film-forming agents, oils and fats) to shorten the subsequent sampling cycle.

2、 Customized cooperation process of liquid foundation co processing

Stage 1: Requirement and Formula Orientation

The brand side shall provide the requirements of target skin feeling (refreshing/moisturizing), concealer level, makeup holding time, etc., and specify the number of color numbers. The factory formulator recommends the basic system (water in oil or oil in water) based on this and issues a preliminary formula cost list. After both parties signed the confidentiality agreement, the factory began its first sampling.

Stage 2: Sample confirmation and process finalization

After receiving the sample, the brand completes the testing of skin adhesion, makeup extension, and compatibility with packaging materials. Usually 2-4 rounds of adjustment are required until the color difference value (△ E) is controlled within the range agreed upon by both parties. Subsequently, the process route is determined as follows: raw material pretreatment → emulsification homogenization → grinding and dispersion → defoaming → semi-finished product testing → filling → finished product inspection.

Phase Three: Trial Production and Document Handover

Conduct a trial production before formal mass production, producing 200-300 finished products. The brand can send personnel to supervise key processes on site and take samples for retention. After confirming the accuracy, the factory hands over the complete "Production Process Regulations", "Inspection Standards", "Raw Material Supplier List" and Safety Data Sheet (MSDS).

Stage 4: Batch Delivery and Continuous Supervision

Sign a contract for commissioned processing, specifying quality standards, acceptance methods, delivery time, and confidentiality clauses. Each batch of bulk goods must be accompanied by a factory inspection report, and the brand should retain samples of each batch for at least 24 months. It is recommended to conduct a quality system review of the factory every six months and reconfirm the comparison results between the color palette and standard samples.

Through the systematic factory evaluation and phased cooperation process, the brand side can reduce the development risk of liquid foundation products, obtain OEM support with stable performance, and lay the foundation for subsequent market launch.