Our prices include most shipping charges. **NEW** West of Mississippi 10% shipping charges waived on orders over $200(except +frt items) (Details)

We stock 5 grades of Poster Backing Boards:
1. Standard Acid-free is acid-free all the way through. Acid-free board can trap migrating acids in paper and neutralize it. Use our .028' thick board for intermediate to long-term storage. White on both sides.

2. Super Acid-freeMuseum Grade Archival. Our .040" thick board is all white. It is acid- and lignin-free and buffered with a 3% calcium carbonate buffer. 

3. Corrugated is either .0625" thick (E-Flute, white on two sides) or .1875" thick (C-Flute, white on 2 sides). It is a popular choice for a backing board because it is rigid and economical.

4. Foam Board - Museum Grade Archival This board is an indefinite-term, archival board. It has a polystyrene foam core (making it ultralightweight) with a laminated white, smooth facing. It is buffered with 3% calcium carbonate and is acid-free with a pH of 7.5-8.5. It is either .125" or .1875" thick, super rigid.

5. Archival CorrugatedMuseum Grade Archival. This board is .125" thick, B-Flute, "Banner Blue" corrugated cardboard. It is acid- and lignin-free and buffered with a 3% calcium carbonate buffer. Safe for indefinite-term storage. 

Scroll down for available sizes and pricing.

BACKINGS for Sports Posters.   24 x 36.
BACKINGS for Sports Posters.   <NOBR>24 x 36.</NOBR>
Description:
.1875 thick Foam Board.
Museum Grade Archival.

Gilman Brothers brand InSite Reveal® foam board.
All white and buffered. Ultra-lightweight.
.1875 thick Foam Board.
Museum Grade Archival.
Base SKU: kspfc

Related Products and Reviews

BACKINGS for One Sheet Posters. 27-1/4 x 40".
BACKINGS for One Sheet Posters. 27-1/4 x 40
Description:
**NEW SIZE**
 .1875" thick, C-Flute, white on 2 sides.
Short-Term Storage.


Base SKU: kosp40

Related Products and Reviews

BACKINGS for One Sheet Posters. 27-1/4 x 40"
BACKINGS for One Sheet Posters. 27-1/4 x 40
Description:
**NEW SIZE**
.028 thick Acid-Free Board.
Long-Term Storage.
White on both sides.
.028 thick Acid-Free Board.
Long-Term Storage.
Base SKU: kaf28osp40

Related Products and Reviews

BACKINGS for One Sheet Posters. 27-1/4 x 40"
BACKINGS for One Sheet Posters. 27-1/4 x 40
Description:
**NEW SIZE**
.040 Buffered Acid-Free Board.
Museum Grade Archival.
White all the way through.
.040 Buffered Acid-Free Board.
Museum Grade Archival.
Base SKU: kaf40osp40

Related Products and Reviews

BACKINGS for One Sheet Posters. 27-1/4 x 40"
BACKINGS for One Sheet Posters. 27-1/4 x 40
Description:
.125 thick Archival Corrugated.
Indefinite Storage.

This "Banner Blue" B-Flute corrugated cardboard is buffered with 3% calcium carbonate.
**NEW SIZE**
.125 thick Archival Corrugated.

Indefinite Storage.
Base SKU: kospac40

Related Products and Reviews

BACKINGS for One Sheet Posters. 27-1/4 x 41".
BACKINGS for One Sheet Posters. 27-1/4 x 41
Description:
.1875" thick, C-Flute, white on 2 sides.
Short-Term Storage.


Base SKU: kosp

Related Products and Reviews

BACKINGS for One Sheet Posters. 27-1/4 x 41
BACKINGS for One Sheet Posters. 27-1/4 x 41
Description:
.028 thick Acid-Free Board.
Long-Term Storage.

White on both sides.
.028 thick Acid-Free Board.
Long-Term Storage.
Base SKU: kaf28osp

Related Products and Reviews

BACKINGS for One Sheet Posters. 27-1/4 x 41
BACKINGS for One Sheet Posters. 27-1/4 x 41
Description:
.040 Buffered Acid-Free Board.
Museum Grade Archival.

White all the way through.
.040 Buffered Acid-Free Board.
Museum Grade Archival.
Base SKU: kaf40osp

Related Products and Reviews

BACKINGS for One Sheet Posters. 27-1/4 x 41"
BACKINGS for One Sheet Posters. 27-1/4 x 41
Description:
.125 thick Archival Corrugated.
Indefinite Storage.

This "Banner Blue" B-Flute corrugated cardboard is buffered with 3% calcium carbonate.
.125 thick Archival Corrugated.
Indefinite Storage.
Base SKU: kospac

Related Products and Reviews

BACKINGS for British Quad Posters   30 x 40".
BACKINGS for British Quad Posters   30 x 40
Description:
.125 thick Corrugated Cardboard. Short Term Storage.
White both sides.
Base SKU: kbqp

Related Products and Reviews

BACKINGS for British Quad Posters   30 x 40
BACKINGS for British Quad Posters   30 x 40
Description:
.028 thick Acid Free.
Long Term Storage.

White both sides.
.028 thick Acid Free.
Long Term Storage.
Base SKU: kaf28bqp

Related Products and Reviews

BACKINGS for British Quad Posters   30 x 40
BACKINGS for British Quad Posters   30 x 40
Description:
.040 thick Buffered, Acid Free Board.
Museum Grade Archival.

White all the way through.
.040 thick Buffered, Acid Free Board.
Museum Grade Archival.
Base SKU: kaf40bqp

Related Products and Reviews

BACKINGS for British Quad Posters   30 x 40
BACKINGS for British Quad Posters   30 x 40
Description:
.1875 thick Foam Board.
Museum Grade Archival.

Gilman Brothers brand InSite Reveal® foam board.
All white and buffered. Ultra-lightweight.
.1875 thick Foam Board.
Museum Grade Archival.
Base SKU: kbqpfc

Related Products and Reviews

Loading...