If you are looking for physical paper used in drafting and engineering, you can find various styles at these retailers:
: Carries sun printing paper kits for DIY cyanotypes (blueprints) and standard 8.5 x 11 inch graph paper pads. Choosing the Right Paper Type buy blueprints
Blueprint paper: all the different bond styles - Engineer Supply If you are looking for physical paper used
: Sells a wide variety of blueprint paper rolls , compatible with major plotter brands like HP, Canon, and Epson. They also offer Reskid Blueprint and Graph Paper Pads , which feature 50 sheets of 70lb text paper with a subtle blue tint. : A specialist for technical-grade materials
: A specialist for technical-grade materials, offering drafting vellum , Mylar rolls , and inkjet plotter paper .
: Provides high-quality rolls for large-format printing, including custom width and length options.
To "write paper: buy blueprints" can refer to purchasing physical blueprint paper for drafting and technical drawing , or it might refer to using a "blueprint" (a structured guide) to write a research paper.