This domain accounts for 34-36% of current Comprehensive Written general-knowledge questions.
Gypsum, waxes, metals and alloys, plastics and resins, separating materials, fluxes and antifluxes, alcohols, acids and neutralizers, wetting agents, wax solvents, abrasives, laboratory gases, investments, impression materials, ceramics, and cements.
Study materials for this domain are planned.
Blueprint source: CDT Examination Handbook, revised March 1, 2026.