Licensing and Certifications
First of all, you must consider the necessary licenses such as business license, production licence, ISO9001 quality control certification .,etc. They can proof the factory can meet the standard of producing such Products and possess a certain quality control ability.
Production Equipment and Capacity
You also need to consider the production equipment, complete equipment guarantees production capacity and quality, you can check if they have emulsifying tank, filling machine, labeling machine sealing machine etc. And a big factory can supply a stable production process, a clean workshop(100K level dust-free workshop) for production to make sure the products will be not polluted during production.
Quality Control Measures
And quality control shall be also take into consideration. We must care about raw material inspection, production process monitoring, finished product inspection etc.
Sales Service and Customization
Sales service is also very important, especially for the personalized customized service. A professional sales engineer usually gives you a professional advise for package design and printing, and also can help you to avoid potential mistakes and Timely response to your needs and problems.
Competitive and Reasonable Pricing
Most importantly, a reasonable price is a key of business action. A too low price may affect the quality, while a high price may affect the competitiveness of the reseller. So the factory must do a good job for production cost control.