Letterpress matrix types are adhesive matrix and combination matrix.
“Adhesive matrix” uses rubber material with twin adhesive to stick on the matrix seat; “Combination matrix” is that rubber matrix is clipped to the trench of matrix seat; it is suitable for partial replacement of marking content.

UV ink is solvent resistance; it is suitable for applying to the elements in solvent environment.
Heat-drying ink is solvent resistance; it is suitable for applying to the elements in solvent environment.
Quick drying ink is suitable for the marking on room temperature and environment without solvent-resistance.