Marvy Uchida Matchable Ink Pads Re-inker - Caribbean Blue The ultimate tool for rubber stamping, Marvy Ink Pads have pH neutral, non toxic dye-based ink that match other Marvy products. Ink pads have color-coded bases in a 2 1/2 in. square shape for comfortable handling, and a raised inking surface. Each color has a matching re-inker, which can also be used for color mixing or creating a rainbow effect on an un-inked pad.