Homemade Conductive Ink

Conductive inks are commonly used in silk screening, where graphics are printed on fabrics.

Conductive ink is a type of ink that transmits electricity. It is commonly used to print circuits on a range of materials from paper to polyester film using various printing methods. Conductive ink is composed of conductive particles, such as carbon graphite powder or metallic flakes, which allow the ink to expand on the substrate and conduct electricity. The conductivity of the ink also varies depending on which type of ink is being used.

Things You'll Need

• Stainless steel container
• Gloves
• Safety glasses
• Black liquid tape
• Tuloul solvent
• Carbon graphite powder
• Paintbrush
• Teaspoon or tablespoon

Instructions

1. Purchase the materials necessary to mix the conductive ink. Make sure the carbon graphite, also known as lubricating graphite, being used is a fine powder.

2. Choose a well-ventilated area to work in. The mix for conductive ink incorporates strong solvents with quick evaporation, so make sure to work in an open area to avoid the fumes.

3. Add two parts of black liquid tape to three parts of fine carbon graphite. Mix in an additional six parts of Tuloul solvent into the stainless steel container. Use a teaspoon or tablespoon to measure the parts. Mix the conductive ink thoroughly.

4. Apply the conductive ink on the desired surface with a paintbrush. Allow the ink to set for approximately 30 minutes until it is dry to the touch.

Tips & Warnings

• Make conductive ink in small quantities and use the mixture immediately for the best results.

• Always wear safety glasses and gloves for protection and to prevent potential hazards.

References

• Printed Electronics World: Metallic conductive inks
• Creative Materials: Conductive Inks
• Conductive Compounds: FAQ - Conductive Inks