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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 Rock & Personality Posters.   20 x 28.
BACKINGS for Rock & Personality Posters.   20 x 28.
Description:
.040 Buffered Acid Free Board.
Museum Grade Archival.

White all the way through.
.040 Buffered Acid Free Board.
Museum Grade Archival.
Base SKU: kaf40krpp

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BACKINGS for Japanese "B2" Posters. 20-1/4 x 29".
BACKINGS for Japanese
Description:
.1875" thick, C-Flute, white on 2 sides.
Short-term storage.

Base SKU: kja

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BACKINGS for Japanese "B2" Posters. 20-1/4 x 29.
BACKINGS for Japanese
Description:
.028" thick Acid-Free Board.
Long-term storage.

White on 2 sides.
.028" thick Acid-Free Board.
Long-term storage.
Base SKU: kaf28ja

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BACKINGS for Japanese "B2" Posters. 20-1/4 x 29.
BACKINGS for Japanese
Description:
.040 thick Buffered, Acid-Free Board
Museum Grade Archival.

100% Alpha-cellulose board. Conservation grade. Indefinite storage (hundreds of years).
.040 thick Buffered, Acid-Free Board
Museum Grade Archival.
Base SKU: kaf40ja

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BACKINGS for Half Sheet Posters.   22 x 28".
BACKINGS for Half Sheet Posters.   22 x 28
Description:
.1875" thick, C-Flute, white on 2 sides.
Short Term Storage.

Base SKU: khsp

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BACKINGS for Half Sheet Posters/ Digital Photos
BACKINGS for Half Sheet Posters/ Digital Photos
Description:
22 x 28"
.028 thick Acid Free Board

22 x 28"
.028 thick Acid Free Board.
Base SKU: kaf28hsp

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BACKINGS for Half Sheet Posters.   22 x 28.
BACKINGS for Half Sheet Posters.   22 x 28.
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: kaf40hsp

Related Products and Reviews

BACKINGS for Half Sheet Posters.   22 x 28.
BACKINGS for Half Sheet Posters.   22 x 28.
Description:
.1875 thick Foam Board .
Museum Grade Archival.

All white and buffered. Ultra-lightweight.
.1875 thick Foam Board .
Museum Grade Archival.
Base SKU: khspfc

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BACKINGS for Half Sheet Posters.   22 x 28.
BACKINGS for Half Sheet Posters.   22 x 28.
Description:
.125 thick Archival Corrugated.
Indefinite Storage.

B-Flute "Banner Blue" corrugated material. Acid-free, lginin-free. Buffered with calcium carbonate.
.125 thick Archival Corrugated.
Indefinite Storage.
Base SKU: khspac

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BACKINGS for Marvel Posters.   22 x 34".
BACKINGS for Marvel Posters.   <NOBR>22 x 34" />
Description:
.1875" thick, C-Flute, white on 2 sides.
Short Term Storage.

Base SKU: kmp

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BACKINGS for Marvel Posters.   22 x 34.
BACKINGS for Marvel Posters.   <NOBR>22 x 34.</NOBR>
Description:
.028 thick Acid Free Board.
Long Term Storage.

White both sides.
.028 thick Acid Free Board.
Long Term Storage.
Base SKU: kaf28mp

Related Products and Reviews

BACKINGS for Marvel Posters.   22 x 34.
BACKINGS for Marvel Posters.   <NOBR>22 x 34.</NOBR>
Description:
.040 Buffered, Acid Free Board.
Museum Grade Archival.

White all the way through.
.040 Buffered, Acid Free Board.
Museum Grade Archival.
Base SKU: kaf40mp

Related Products and Reviews

BACKINGS for Marvel Posters.   22 x 34.
BACKINGS for Marvel Posters.   <NOBR>22 x 34.</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: kmpfc

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BACKINGS for European Posters. 23 x 33".
BACKINGS for European Posters. 23 x 33
Description:
.1875" thick, C-Flute, white on 2 sides.
Short Term Storage.

Base SKU: keup

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BACKINGS for European Posters. 23 x 33.
BACKINGS for European Posters. 23 x 33.
Description:
.028 thick Acid-Free Board.
Long Term Storage.

White on 2 sides.
.028 thick Acid-Free Board.
Long Term Storage.
Base SKU: kaf28eup

Related Products and Reviews

BACKINGS for European Posters. 23 x 33.
BACKINGS for European Posters. 23 x 33.
Description:

.040 thick Buffered,

Acid-Free Board. Museum Grade Archival.
100% Alpha-cellulose board. Conservation grade. Indefinite storage (100s of years).

.040 thick Buffered,
Acid-Free Board. Museum Grade Archival.
Base SKU: kaf40eup

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BACKINGS for European Posters. 23 x 33.
BACKINGS for European Posters. 23 x 33.
Description:
.1875 (3/16") thick Foam Board.
Musem Grade Archival.

All white and buffered. Ultra-lightweight.
.1875 (3/16") thick Foam Board.
Musem Grade Archival.
Base SKU: keupfc

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BACKINGS for Sports Posters.   24 x 36.
BACKINGS for Sports Posters.   <NOBR>24 x 36.</NOBR>
Description:
.125 thick Corrugated Cardboard.
Short Term Storage.

White on both sides.
.125 thick Corrugated Cardboard.
Short Term Storage.
Base SKU: ksp

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BACKINGS for Sports Posters/ Digital Photos
BACKINGS for Sports Posters/ Digital Photos
Description:
.028 thick Acid Free Board.
Long Term Storage.

White both sides.
24 x 36"
Base SKU: kaf28sp

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BACKINGS for Sports Posters.   24 x 36.
BACKINGS for Sports Posters.   <NOBR>24 x 36.</NOBR>
Description:
.040 Buffered, Acid Free Board.
Museum Grade Archival.

White all the way through.
.040 Buffered, Acid Free Board.
Museum Grade Archival.
Base SKU: kaf40sp

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