Redstone makes the potion last longer when you drink it.
To make potions last longer, you add redstone to them.
You have to mine redstone ore.
To make a redstone torch, you must have one redstone dust and one stick. You put the stick on the bottom and the redstone dust above the stick. It's the same recipe as a torch, only with redstone dust instead of coal.
Redstone Lamps are made using the following recipe. r = redstone dust g = glowstone block [ ][r][ ] [r][g][r] [ ][r][ ]
In a crafting table, Woodern planks surrounding 1 redstone dust.