Is ALUM POWDER safe to use on the skin?

You will need: Eggshells (Cleaned, membrane removed, and dried) 🥚 Acrylic Paint (Black, Dark Blue, or Purple) 🎨 Alum Powder 🧂 White Glue 🧴 Boiling Water 💧 Food Coloring (Blue, Red, Purple) 🌈 Silver/Gold Glitter ✨ Paintbrush 🖌️ Instructions: 1. Prepare the "Space" Base 🌑 Paint the inside of your clean, dry eggshell with black or dark blue acrylic paint. Let the paint dry completely. This dark background creates the "deep space" look behind your crystals. 2. Seed the Stars Once the paint i

Watching these alum crystals grow is so satisfying - perfect for kids, teens, and curious adults 💠🧪 Ingredients: ½ cup alum powder (potassium aluminium sulphate) 1 cup very hot water A few drops of liquid food colouring (optional) 1 clean glass jar 1 piece of cotton string 1 small stick, pencil, or skewer 1 small weight (paperclip or metal bead) Protective gloves (optional) Directions: Pour the hot water into a clean glass jar. Add the alum powder gradually, stirring until fully dissolved. Con