The present invention relates to a composition for dyeing keratin fibers, comprising at least one dye precursor, at least one bioheteropolysaccharide, at least one cationic surfactant and at least one amphoteric surfactant. The memory encompasses a first and a second threshold level. A photoresist layer is overlaid on the second conductive layer. The cover component has respective pairs of rectangular openings on first and second sides thereof configured to snap fittingly engage respective tabs on the sides of the base component as the cover component is pushed downwardly over the base component to thereby attach the cover component to the base component. , {C_, C\u20142K} and allocated a set of the pilot sequences to each of the cells #1 to #K. The hardenable dental compositions include a thermally labile component including one or more thermally labile groups.