Making gray wash for realistic tattoos is actually quite simple. Here's a step-by-step guide:

1. Start with a bottle of black tattoo ink. Make sure it's a high-quality brand.
2. Get a clean, empty ink cap or a small container to mix your gray wash in.
3. Begin by adding a small amount of black ink to the cap or container.
4. Gradually add distilled water to the ink, a few drops at a time.
5. Mix the ink and water together using a sterile tattoo needle or a clean stir stick.
6. Continue adding water and mixing until you achieve the desired shade of gray. Remember, you can always add more water to lighten the wash.
7. Test the gray wash on a piece of practice skin or a sterile surface to see if it's the shade you want.
8. Once you're happy with the gray wash, transfer it to a clean, sterile ink cap for use during the tattooing process.

Remember, it's important to maintain proper hygiene and safety protocols when working with tattoo ink. Always use sterile equipment and dispose of any leftover ink properly. Happy tattooing, 🖤💉