We have a 10 lb. limit per order. If you need more Glauber Salt, you will need to place a separate order.1 lb Glauber Salt (Sodium Sulfate Anhydrous). Can be used in place of common salt when dyeing wool, silk, and nylon with acid dyes. May also be used with Reactive Dyes, especially Turquoise, to increase color yield. [When using reactive dyes for cotton, rayon, silk for tie dye, no salt is necessary.] Follow the instructions in the dye book or recipe you are using.