Check the listing for details. Natural Dye - Soda Ash - 4 ounce package. Condition: New. Listed at 3.80 USD. Soda Ash - Sodium Carbonate Sold in 4 ounce package, Ships from the USASoda Ash - Sodium Carbonate - Washing SodaUsed in the scouring of cellulosic fibers prior to dyeing - a bath of sodium carbonate with a little liquid soap allows to remove fabrics impurities and to prepare them for dyeing. Rinse fibers after this treatment.Color brightener - pH adjustment of baths, brightens yellow shades (a little sodium carbonate – pH set around 8.0 – will make them more intense and more bright.Color modifier by making dye-baths more alkalineCochineal will produce fuchsia in an alkaline dye bathInstructions for use included!**Buyer responsible for import/export rules to their country.** Know your laws! Not all products are legal to ship to your country and may be seized by customs. We cannot offer refunds or reships should this happen.