What Is the Ink Dot Test for Wood Bats? MLB Certification Explained
Ever noticed a small ink dot on the handle of a pro wood bat? It’s more than a mark — it’s proof of MLB-grade quality. In this guide, Diamond Sport Gear explains the Ink Dot Test, how it measures grain straightness and durability, and why it’s required for pro-approved maple and birch bats. Learn how this simple test ensures safety, performance, and premium craftsmanship. Learn What the Ink Dot Test Means for Wood Bats →
The Ink Dot is the stamp of the highest quality wood bat. Bats that feature the Ink Dot signify that they are in the top 3 percent of wood from the harvest and they satisfy the strict slope of grain requirements by Major League Baseball. Indicating that your bat is big league quality and approved. All Louisville Slugger Prime Maple and Birch bats carry this seal of approval. Due to its clearly defined grain structure, Ash bats are not subject to the Ink Dot test to be eligible for use by MLB.
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