Alum Powder For Marbling

A white crystalline compound used in solution for coating paper prior to marbling for setting dyes on fabrics and other applications.

Alum powder for marbling.

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 is a powdered presoak used to treat fabric or for marbling. You may apply the alum with a brush sponge or a spray bottle. The reasons behind this i have not been able to find out but it.

It makes the colours adhere to the paper. Also sometimes referred to as potassium aluminum sulfate. 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. 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.

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. Alum is the third most important substance in marbling after the gall and the size. Marbling on tragacanth does not requore alum but the paper must be dampened slighly to accept the colour. Alum is a mordant meaning it causes color to set on the paper.

Alum safety depends on multiple factors. Without a mordant the pigments will slide off the paper. Sodium aluminum sulfate is a type of alum that is used in commercial baking powder. This video demonstrates the recipes and techniques necessary for aluming paper in preparation for marbling.

Without it the marbling will be faint and blurry. Mix 1 tablespoon of the powdery alum per one cup of water and then thoroughly wet the surface of your paper. Buy pure aluminum sulfate from an art supply store or online. Marbling paper in the ebru turkish style requir.

It is sold in a dry crystal form and is soluble in water. 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. Alum is also used with some natural dyes as a mordant. Dissolve 2 teaspoons alum into 1 gallon of water to make a solution for fabric to be marbled.

The alum helps the pigments used in marbling to adhere to the paper. It forms cubic or octahedral crystals that are. 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 or potassium aluminum sulfate is a chemical often used as a food preservative.