It seems like you might be referring to "hand lay-up" technology, which is a manufacturing process used in industries like aerospace, automotive, and marine to create composite materials. Hand lay-up is a manual process where layers of composite materials, such as fiberglass, carbon fiber, or Kevlar, are laid up by hand onto a mold or tool to create a desired shape or part.

Here's how the hand lay-up process generally works:

Prepare the Mold: First, a mold or tool that matches the desired shape of the final product is prepared. This mold is often coated with a release agent to prevent the composite from sticking to it.

Cutting and Preparing Materials: The composite materials, typically in the form of sheets, fabrics, or prepreg materials (pre-impregnated with resin), are cut into the required shapes and sizes.

Layering: Layers of the composite material are then placed onto the mold one at a time. The technician applies resin (often epoxy or polyester) to each layer to wet it out, ensuring that the fibers are thoroughly impregnated with the resin.

Consolidation: After each layer is added, it may be smoothed and consolidated using tools like rollers or brushes to remove air bubbles and ensure good adhesion between layers.

Curing: Once all the layers are in place, the composite part is allowed to cure. Curing typically involves a specific temperature and time duration to allow the resin to harden.

Demolding: After curing, the part is carefully removed from the mold. Any excess material or flash is trimmed or sanded to achieve the final shape.

Finishing: Additional finishing steps, such as sanding, painting, or applying coatings, may be necessary to achieve the desired surface finish and appearance.

Hand lay-up is a labor-intensive process, and the quality of the final product depends on the skill and experience of the technician performing the lay-up. While it is suitable for producing small to medium-sized parts and prototypes, larger-scale production often relies on more automated methods like resin transfer molding (RTM) or automated fiber placement (AFP) for efficiency and consistency.

It's worth noting that composite materials offer advantages such as high strength-to-weight ratios and corrosion resistance, making them valuable in various industries.