Wallpaper / Papier Mache Paste

1 ½ cups white flour
½ cup sugar
1 Tablespoon alum
1 cup cold water
2 cups boiling water

Combine flour and sugar. Slowly add cold water and beat / mix out any lumps. Put mixture in a saucepan over a medium heat. Add the boiling water, and stirring constantly, bring the mixture to the boil. When stiff, remove from heat and add alum. Store in airtight container. Should keep for several weeks. If the paste hardens, soften by mixing in small amounts of warm water as needed.