By definition, acid free is having a pH of 6.5 to 8.0. As of February 2016, the following Crayola products met an "acid free" definition [having a pH of 6.5 to 8.0]:
- Crayola Acrylic Paint
- Crayola Crayons
- Crayola Markers
- Crayola Colored Pencils
The color pigments contained in most Crayola products are not permanent and will fade over time when exposed to strong light. However, Crayola Portfolio Series Acrylic paints would be considered permanent and light-fast on most paper surfaces
*Vendor and product ingredients may change and cause a product that was once acid free to no longer be, and vice versa.