September 6, 2023 Amy Shulke Ohuhu Marker, Ohuhu Swatch, Ohuhu Test R3 Coral Red: Testing Ohuhu Markers for Lightfastness and Quality September 6, 2023 Amy Shulke Ohuhu Marker, Ohuhu Swatch, Ohuhu Test R3 Coral RedLet’s take a closer look at this Ohuhu Marker and its ink characteristics.