Years ago we worked with art teachers and designed the perfect clay for schools, APS is the large school district in Albuquerque. We worked on on making the clay perfect, easy to use, non-staining, durable. When bid time came around a crappy clay from Laguna won the bid because it was cheaper.
Over time APSR became very popular.
CONE: 04 SHRINKAGE: 10% ABSORPTION: 5.6% PENTROMETERS: 5
WARNING: This product can expose you to chemicals including Silica, crystalline (airborne particles of respirable size), which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.