Strathmore 400 Series Bristol Board

Regular surface-for pencil, charcoal and pastel. Smooth surface-for detailed ink work, pencil, and marker. Both surfaces excellent for airbrush. Good choice when longevity of cotton fibers isn't essential. Acid-free. 2 to 4-ply.
When the longevity of cotton fibers is not required both intermediate and professional artists recommend the Strathmore 400 Series Bristol Regular (Vellum) surface works well with pencil charcoal and pastel Smooth surface is ideal for detailed ink work and is also suited for pencil and marker Both surfaces are excellent for airbrush Acidfree 2230

Strathmore 400 Series Bristol Board Pads

Your 400 & 500 Series Bristol papers are measured in plies - What are the pound weights? - Strathmore Artist Papers

PAPER BRISTOL SHEET 22.5 x 28.5 inches 100LB 300 SERIES 345-2

Repost from - The National Cartoonists Society

Strathmore Toned Sketch Paper Pad, 400 Series, 18in x 24in, 24 Sheets, Gray

A high quality multi-ply bristol available in two surfaces/finishes. Smooth finish is excellent for fine line drawings using pen & ink or marker.

Strathmore 400 Series Bristol Board

Examples and close ups of paper types. – Jessica Lebo Art

400 Series Toned Sketch Journals

Strathmore 400 Series Bristol Board, BLICK Art Materials

Strathmore Bristol Sheet

400 Series Bristol - Strathmore Artist Papers

This Strathmore 400 Series Bristol Pad offer a high quality 2-ply bristol with a smooth finish. Ideally suited for work with technical pen, airbrush,

Strathmore 400 Series Bristol Pad - Smooth, 9 x 12

Paper – Jerrys Artist Outlet

Strathmore 300 Series Bristol Pads