The articles doesn't give examples of why you need to test your logo in black and as small size. I think some logo designers only focus on digital so here some

The articles doesn't give examples of why you need to test your logo in black and as small size. I think some logo designers only focus on digital so here some non digital examples: Black logo examples: Logo on a Fax Logo on a photo copy Logo on a black-only laser printer Small logo examples: Logo on a pen Logo on a USB drive