Dyeing jeans without getting them wet or washing them first is technically possible, but it's not a common or recommended method. The most common and effective way to dye jeans is by using fabric dye in a water-based solution, and this requires the jeans to be wet during the dyeing process to ensure even color absorption.
However, there are alternative dyeing methods that involve using spray-on or paint-on dyes that can be applied to dry jeans. These dyes are designed to adhere to the fabric without requiring water, but they may not penetrate the fabric as deeply as traditional fabric dyes. As a result, the color may not be as vibrant or long-lasting.
Keep in mind that dyeing dry jeans without water may also lead to uneven color distribution, and the final result might not be satisfactory. Additionally, some dyeing methods may require heat-setting or other treatments, which could be challenging or less effective on dry jeans.
If you're considering dyeing your jeans, it's generally recommended to follow traditional fabric dyeing methods that involve wetting the jeans before applying the dye. This will give you the best chance of achieving a desirable and long-lasting color. Always check the instructions on the dye product you're using and conduct a small test on a hidden area of the jeans before proceeding with the full dyeing process.