Interactive study 16 / Warm
Meridian Palmprint Card Sleeve
Warm a thumb-sized patch to uncover the amber disc of Red Meridian through a dark layer of ink.
16 / Red MeridianCool sleeve
The thermal layer
Warm one spot.
Hold a finger or pointer over the dark disc, then lift it to let the colour return. Use Warm thumbprint to keep a spot open for a closer look.
Thermal layer
Cool. The ink veils the amber disc.