Prewound Bobbins are bobbins that are sold ready to be used whereas self-wound bobbins refer to buying thread to wind manually before using.
There are two types of prewound bobbin: normal, which has a plastic core or is wound to the metal/aluminium bobbin, and coreless, which is a self-supporting structure that does not require a plastic core.
In terms of quality, prewound bobbins are much better than self-wound bobbins due to the difference in material used and different winding methods. Moreover, greater length and consistency can be achieved with prewound bobbins, especially our GEM Prewound Bobbin, which leads to a significant rise in productivity.
Water soluble film, felt, and fabric, all serve the same purpose: to dissolve in water after embroidery. However, the application of each material varies depending on the temperature of the water used and the type of embroidery finishing desired.
At Rapos Group, we supply all three types of water soluble materials. Our GEM Acqua Film (water soluble film) is designed to easily dissolve at room temperature. This material is mostly used to eliminate embroidery stitches from sinking into the fabric, such as when embroidering towels.
GEM Acqua Fabric (water soluble fabric), on the other hand is a nonwoven fabric which is used more for lace embroidery. Different to GEM Acqua Film, this material dissolves at higher temperatures between 40°C and 90°C.
Lastly, GEM Acqua Felt (water soluble felt) is a special type of material used to produce 3D embroidery designs. This material can be dissolved between 20°C to 60°C.
An advantage of all our water soluble materials is that they contain no formaldehyde whatsoever, making them absolutely safe for garment manufacturing.