The Achievers Pen – There is a research result of the College of Psychology that a dark ink improves memory. UMN-SP-38 ink is darker and more vivid than general gel ink.
Everything You Need and So Much More
Everything You Need and So Much More
The Achievers Pen – There is a research result of the College of Psychology that a dark ink improves memory. UMN-SP-38 ink is darker and more vivid than general gel ink.