Flash Science: Secret Message With Windex

 In Flash Science, Shopcasts and Videos

Goldenrod paper turns red when ammonia or other base is added. Rachel shows us how we can use this to write secret messages!

Parts Needed

1 Goldenrod paper (Must be made with real goldenrod pigment! Certain brands work for this, others don’t.)
1 Wax candle
1 Bottle Windex (“Classic”) or other glass cleaner with ammonia