A scratch-off coating is provided which includes a first layer of ink comprised of a water-based ink; and a second layer of ink comprised of an ultraviolet-cured ink layered over said first layer of ink, wherein upon application of a scratching force said first layer of ink and said second layer of ink are removable from a surface on which said first layer of ink and said second layer of ink are applied.

A scratch-off coating is provided which includes a first layer of ink comprised of a water-based ink; and a second layer of ink comprised of an ultraviolet-cured ink layered over said first layer of ink, wherein upon application of a scratching force said first layer of ink and said second layer of ink are removable from a surface on which said first layer of ink and said second layer of ink are applied.

A scratch-off coating is provided which includes a first layer of ink comprised of a water-based ink; and a second layer of ink comprised of an ultraviolet-cured ink layered over said first layer of ink, wherein upon application of a scratching force said first layer of ink and said second layer of ink are removable from a surface on which said first layer of ink and said second layer of ink are applied.

A scratch-off coating is provided which includes a first layer of ink comprised of a water-based ink; and a second layer of ink comprised of an ultraviolet-cured ink layered over said first layer of ink, wherein upon application of a scratching force said first layer of ink and said second layer of ink are removable from a surface on which said first layer of ink and said second layer of ink are applied.

An activatable print medium is disclosed. The print medium includes a first reactive component, a second reactive component, wherein the first and second reactive components are configured to react to initiate a state change of the activatable print medium when exposed to each other and a barrier that is initially in an unactivated form and configured to transition to an activated form when activated by an application of at least one of an activation heat and an activation pressure wherein after the barrier is activated, but not before, the activatable print medium is configured so that the first and second reactive components interact in response to a predetermined environmental stimulus or interact over time at a rate dependent on an environmental stimulus, thereby providing an indication of the cumulative historical exposure of the activatable print medium to the environmental stimulus.