Amy Shulke 12/11/23 Amy Shulke 12/11/23

PB3 Cobalt Blue: Testing Ohuhu Markers for Lightfastness and Quality

PB3 Cobalt Blue

Let’s take a closer look at this Ohuhu Marker and its ink characteristics.

Amy Shulke 10/9/23 Amy Shulke 10/9/23

Let’s take a closer look at this Ohuhu Marker and its ink characteristics.