Ask the people on the production line if there are any restrictions. For example, some colors can't be printed. If you are designing a T-shirt, you should get the following information from the printing factory: the design of the size (specification) (how big it can be printed), the type of clothes you want to print, and the weight/quality of the fabric (for example, you can choose thinner and cheaper fabrics for summer clothes).
Details are everything. As a sketch, you should create a sketch that clearly shows every detail and has accurate terminology. If you don't know what this term is, find the corresponding photos to the factory and ask their names. Learn jargon and be prepared to correctly identify the structure (output), content and structure to be used.
Design process:
The conception of fashion design is a very active thinking activity, which usually takes some time to form gradually, or it may be inspired by a certain aspect and suddenly come into being. Everything in social life, such as flowers, insects, fish, mountains and flowing water, historical sites, paintings and sculptures in the field of literature and art, dance music and ethnic customs, can bring infinite inspiration to designers.
New materials are constantly emerging, constantly enriching the designer's performance style. The vast world provides infinitely vast materials for fashion design ideas, and designers can explore themes from all aspects. In the process of conception, designers can express their thinking process by sketching clothes, and then draw detailed clothing design drawings after modification and supplement.