Abstract: A stamp ink, for stencil printing, is made from a coloring-agent mixed in a vehicle made from resin and oil-based solvent. The stamp ink has a viscosity in a range from 20 to 250 poises at a shear rate of 20/sec under temperature of 25.degree. C. and has a thixotropy index T.I. in a range from 1.2 to 3.0 under temperature of 25.degree. C. where the thixotropy index T.I. is defined in the expression of: T.I.=(Viscosity at a shear rate of 0.5/sec)/(Viscosity at a shear rate of 5.O/sec).

Abstract: A stencil stamp is provided with a plurality of individually replaceable stencil stamp blocks. The stencil stamp is capable of stamping a multicolor pattern by a single stamping action. The stencil stamp comprises a handgrip to be gripped by the user's hand, a stamping unit, which is fixedly held by a stencil stamp block holding member on the handgrip, and a skirt, which covers the stamping unit for protection. The stamping unit comprises a plurality of stencil stamp blocks, each having a stamping part for forming a particular pattern. The plurality of stencil stamp blocks may be provided with ink-bearing members impregnated with inks of different colors to enable multicolor stamping by a single stamping action. The stencil stamp blocks can be individually removed from the stencil stamp block holding member, and can be used in desired combinations to create different patterns.