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slab = a thick, flat piece of a solid material, that is usually square or rectangular.

lye = a strongly alkaline solution, especially of potassium hydroxide (KOH), used for washing or cleansing

rinse = wash with clean water

pulp = a soft, wet, shapeless mass of material.

sieve = a tool used for separating solids from liquids or larger pieces of something from smaller pieces

spend fortunes = to pay large sums of money

scribble = write or draw carelessly or hurriedly

EFL subset that concentrates more on language in context than on grammar and language structures. It covers topics from accounting or computer science to tourism and business management. "Specific" means the studying through a field that is already known and relevant to a student.