Method for dyeing keratinous material, comprising the use of an organosilicon compound, an effect pigment and a post-treatment agent

A process for dyeing keratinous material, comprising:

• applying an agent (a) to the keratinous material, wherein the agent (a) comprises:
• (a1) at least one organic silicon compound of formula (I) and at least one organic silicon compound of formula (IV),
• R1R2N-L-Si(OR3)a(R4)b (I),
• where
• R1, R2 each independently represent a hydrogen atom or a C1-C6 alkyl group,
• L is a linear or branched divalent C1-C20-alkylene group,
• each R3, R4 independently represents a C1-C6 alkyl group,
• a is an integer of from 1 to 3, and
• b is the difference of 3−a:
• R9Si(OR10)k(R11)m (IV),
• where
• R9 represents a C1-C18-alkyl group,
• each R10 independently represents a hydrogen atom or a C1-C6 alkyl group,
• each Ru represents a C1-C6 alkyl group,
• k is an integer of from 1 to 3, and
• m is the difference of 3−k;
• and
• (a2) at least one color-imparting compound comprising at least one effect pigment, the at least one effect pigment comprising
• α) a substrate platelet comprising synthetic mica, and
• β) a coating comprising at least a first metal oxide (hydrate) layer;
• and
• applying an agent (b) to the keratinous material, wherein the agent (b) comprises:
• (b1) at least one sealing reagent.