Which Type of Paper is Treated with Oils and Chemicals

Question

Which type of paper is treated with oils and chemicals to make it heavier and durable?
A) tracing paper
B) opaque drawing paper
C) grid paper
D) vellum

Accepted Answer

Vellum is often treated with oils and chemicals to make it heavier and more durable. Tracing paper is typically lightweight and translucent, opaque drawing paper and grid paper are not typically treated with oils and chemicals.