| abstract |
The dyeing and welding process may consist of applying a process solvent having a dye and/or colorant therein to the substrate, thereby converting the substrate into a welded substrate having at least some color imparted thereto through the dye and/or colorant, , wherein the process solvent disrupts one or more intermolecular forces between one or more components in the substrate. The substrate may be composed of natural fibers such as cellulose, hemicellulose, and silk. The process solvent may include a binder such as a dissolved biopolymer (eg, cellulose). After application of a process solvent comprised of a dye and/or colorant, the substrate may be exposed to a second application of a process solvent comprised of a binder, the second application comprising a process temperature/pressure zone, a process solvent recovery zone, and/or a drying zone It can happen before or after. |