Alum Powder For Marbling

Marbling on tragacanth does not requore alum but the paper must be dampened slighly to accept the colour.

Alum powder for marbling.

Alum aluminum sulphate every sheet of paper to be marbled must be coated with alum. Alum is the third most important substance in marbling after the gall and the size. It ensures that designs transfer clearly to fabric or paper surfaces. Without a mordant the pigments will slide off the paper.

It acts as a color binder or mordant fixing the colors to the paper permanently if alum is not applied to the paper before marbling most of the color will rinse off. Dissolve 2 teaspoons alum into 1 gallon of water to make a solution for fabric to be marbled. Alum safety depends on multiple factors. Alum is a mordant meaning it causes color to set on the paper.

Any form of aluminum sulfate could be called alum including toxic versions of the chemical however the type of alum you find used for pickling and in deodorant is potassium alum kal so 4 2 12h 2 o. Alum is also used with some natural dyes as a mordant. It forms cubic or octahedral crystals that are. To make enough alum for several dozen sheets of paper stir 1 tbsp 15 ml alum into 1 cups 360 ml warm water until completely dissolved at least two minutes.

Alum in powder left and lump right form. Mix 1 tablespoon of the powdery alum per one cup of water and then thoroughly wet the surface of your paper. It makes the colours adhere to the paper. You may apply the alum with a brush sponge or a spray bottle.

Sodium aluminum sulfate is a type of alum that is used in commercial baking powder. It is sold in a dry crystal form and is soluble in water. This video demonstrates the recipes and techniques necessary for aluming paper in preparation for marbling. Alum is a powdered presoak used to treat fabric or for marbling.

The alum helps the pigments used in marbling to adhere to the paper. You will need to cover your paper with alum in order for the design to transfer from the water to the paper without getting washed away. Buy pure aluminum sulfate from an art supply store or online. Also sometimes referred to as potassium aluminum sulfate.

Alum or potassium aluminum sulfate is a chemical often used as a food preservative. A white crystalline compound used in solution for coating paper prior to marbling for setting dyes on fabrics and other applications. Al 2 so 4 3 k 2 so 4 24h 2 o this product looses 18 h 2 o at 92 5 o c and becomes anhydrous at 200 o c. Alum is used in the fabric marbling process as a pre mordant to make marbling paints stick and is also used as one of the safer chemicals to pre mordant fabric in preparation for natural dyeing.