Pitch Buttoning And Blocking - Spherical Lenses

Year Published: 1944

Creator: U S OFFICE OF EDUCATION 400 MARYLAND AVE SW WASHINGTON DC 20202

Format: 16mm

Sound: sound

Description: Demonstrates the blocking of large convex lenses, blocking with pagoda tool, the use of the ring button, buttoning and blocking with pitch points and the pitch buttoning and blocking of very small lenses.