How to Grind Sumi Ink: A Complete Guide to Preparing Ink for Japanese Calligraphy

In Japanese calligraphy, grinding ink is far more than mere preparation. It is a meditative ritual—a moment to quiet the mind and connect with the art you are about to create.

When I first began studying shodo, my teacher repeatedly told me to "treasure the time spent grinding ink." I didn't understand then, but now I am certain that this quiet preparation is the very first stroke of any great work.

In this guide, I'll walk you through everything from choosing the right ink stick to achieving the perfect consistency, drawing on my own experience as a professional calligrapher.

Solid Ink vs. Liquid Ink: Which Should You Use?

If you're new to calligraphy, you might wonder whether bottled liquid ink (bokuju) is good enough. It is certainly convenient, and I use it myself for daily practice. However, freshly ground sumi ink has qualities that liquid ink simply cannot replicate.

Advantages of Solid Ink (Koboku)

• Depth of color: Freshly ground ink develops a unique luster and dimension when dry
• Control over density: You can adjust the concentration to match your work precisely
• Fragrance: Quality ink sticks contain subtle herbal fragrances that calm the mind
• Mental preparation: The grinding process itself becomes a form of meditation before writing

Use liquid ink for casual practice and solid ink for serious study and finished works. The key is knowing when each is appropriate.

Choosing Your Ink Stick

Solid ink sticks fall into two main categories: yuen-boku (oil soot ink) and shoen-boku (pine soot ink).

Oil Soot Ink (Yuen-boku)

Made from soot produced by burning rapeseed or sesame oil:

• Rich, glossy black
• Ideal for kanji in kaisho (block script) and gyosho (semi-cursive)
• Easier to grind and more forgiving for beginners
• Reaches working density relatively quickly

Pine Soot Ink (Shoen-boku)

Made from soot of burned pine wood:

• Deep black with subtle blue undertones
• Popular for kana calligraphy and ink painting (sumi-e)
• Takes longer to grind
• Produces a uniquely subdued, refined tone

For beginners, I recommend oil soot ink. It is easier to work with and produces a beautiful, consistent black. Most of my own works use oil soot ink as well.

Preparing Your Inkstone (Suzuri)

Before grinding, check your inkstone's condition.

Types of Inkstone

• Tankei-ken: Premium Chinese inkstones with an exceptionally fine surface
• Amehata-suzuri: High-quality Japanese inkstones, excellent for daily use
• Ramon-ken: Affordable and widely available, perfect for practice

Inkstone Maintenance

Over time, ink particles can clog the grinding surface (called the "oka" or "land"), making it too smooth to work effectively. If your ink stick glides without producing much ink, gently resurface the stone using fine-grit sandpaper (around #800) or a dedicated sharpening stone. This process is called "sharpening the suzuri."

How to Grind Ink: Step by Step

Step 1: Add Water

Pour a small amount of water into the "umi" (sea)—the recessed well of the inkstone. Start with less than you think you need. About one teaspoon is a good starting point. You can always add more, but diluting ink that is already too thin is difficult.

Tap water works fine, though aged or filtered water can produce a slightly cleaner ink tone.

Step 2: Hold the Ink Stick

Grip the ink stick lightly between your thumb, index finger, and middle finger. Avoid squeezing too hard—this causes fatigue and risks cracking the stick.

Step 3: Grind

Place the ink stick on the oka (flat grinding surface) and move it straight back and forth. Here are the essential points:

• Avoid circular motions: Despite common advice to draw circles, straight strokes produce more even particles
• Use light pressure: Let the weight of the stick do most of the work, adding only gentle downward force. Pressing too hard creates coarse particles that make your writing rough
• Keep a steady rhythm: I like to synchronize with my breathing—forward on the exhale, back on the inhale
• Use the entire surface: Grinding in one spot wears the stone unevenly

Step 4: Check the Density

After several minutes, dip your brush tip into the ink and test-write a few characters.

• For practice on hanshi paper: Slightly darker than you think you need is usually right
• For finished works: Adjust to match the mood. Bold kaisho calls for dense ink, while flowing gyosho may benefit from a slightly lighter consistency

Density test: When a thin film of ink coats the grinding surface and feels slightly slick between your fingers, you've reached a good medium density.

Step 5: Collect the Ink

Let the ground ink flow down into the umi (well). Avoid leaving pooled ink on the grinding surface while continuing to grind, as this can create uneven particle sizes.

How Long Should You Grind?

This is one of the most common questions I receive. The answer depends on your ink stick and inkstone, but here are general guidelines:

• A few sheets of practice: 5–10 minutes
• Finished work (dense ink): 15–20 minutes
• Large-scale pieces: 30 minutes or more

It may sound like a lot of time, but this is one of the most rewarding parts of calligraphy. For me, grinding ink is like meditation. The noise of daily life fades away, and my attention narrows to the characters I'm about to write. That focused state shows in the finished work.

MUKYO's Ink Grinding Routine

Here is my personal pre-writing ritual:

1. Set the environment: Open a window for fresh air, play soft music at low volume
2. Arrange tools: Place the suzuri, ink stick, water dropper, felt mat, and paperweights in their positions
3. Three deep breaths: Release tension from the shoulders and settle the mind
4. Add water: Just a little. Patience is everything
5. Grind slowly: Synchronized with breathing, for 15 to 20 minutes
6. Test write: A few characters to check the ink and my own readiness

This sequence is my "switch" into calligraphy mode. By the time I pick up the brush for real, my mind is already where it needs to be.

Common Mistakes and How to Fix Them

Ink is too thin

→ You added too much water. Continue grinding to build density, or wait and let some water evaporate naturally.

Ink feels gritty

→ You're pressing too hard. Lighten your touch. The stone surface might also be too coarse—try a finer inkstone.

Ink stick cracked or broke

→ Solid ink is sensitive to dryness. After use, wipe off moisture with a soft cloth and store it in a paulownia box. Avoid sudden temperature changes.

Inkstone is stained

→ Always wash your suzuri with water after each session and dry it with a cloth. Ink left to dry on the surface becomes extremely difficult to remove.

Final Thoughts

Grinding ink is the origin point of calligraphy. In our increasingly digital world, the act of preparing ink by hand and writing with a brush carries profound meaning.

It might feel tedious at first, but give it time. Before long, you'll find that those quiet minutes at the inkstone become one of the most peaceful parts of your day. Pick up an ink stick and a suzuri, and experience it for yourself.

If you'd like to learn more about shodo, explore my other articles. The world of Japanese calligraphy is endlessly deep, and the more you discover, the more fascinating it becomes.