The customized production process of printed glass bottles usually includes the following steps:

1. Design and customization: Customers can provide requirements to the factory, including bottle shape, size, capacity, printing pattern and so on. The factory will design according to the customer's requirements and provide a detailed drawing for the customer.

2. Mold making: According to the drawings provided by customers, the factory will make molds. Special materials and techniques are needed to ensure the accuracy and quality of the molds.

3. Printing: After the mold is made, the factory will print the pattern and color on the surface of the bottle. The printing process requires the use of specialized equipment and techniques to ensure accurate and lasting patterns and colors.

4. Firing: Printing and firing processes need to be carried out at high temperature to ensure the stability and safety of the glass. The firing process requires the use of special materials and techniques to ensure the clarity of the glass and the purity of the color.

5. Quality inspection: After the bottle is fired, the factory will conduct quality inspection on the bottle to ensure that the bottle meets the requirements of customers. Quality inspection includes checking bottle shape, size, color, transparency, and so on.

6. Packaging and delivery: Bottles that pass the inspection will be packaged and sent to the customer. The packaging process requires the use of specialized materials and techniques to ensure the safety and integrity of the bottle.

In general, the customized production process of printed glass bottles needs to go through several steps to ensure the quality and safety of products. Customers need to provide detailed requirements to the factory, and design and manufacture according to the requirements.