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 Jumbo Lobby Card/ LARGE Tabloid. 14 x 17.
BACKINGS for Jumbo Lobby Card/ LARGE Tabloid. 14 x 17.
Description:
.125 thick Foam Board.
Museum Grade Archival.

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

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BACKINGS for Window Card Posters   14-1/8 x 22-1/8"
BACKINGS for Window Card Posters   14-1/8 x 22-1/8
Description:
.1875" thick, C-Flute, white on 2 sides.
Short Term Storage.

pH neutral.


Base SKU: kwcp

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BACKINGS for Window Card Posters   14-1/8 x 22-1/8
BACKINGS for Window Card Posters   14-1/8 x 22-1/8
Description:
.028 thick Acid Free Board.
Long Term Storage.

White both sides.
.028 thick Acid Free Board.
Long Term Storage.
Base SKU: kaf28wcp

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BACKINGS for Window Card Posters   14-1/8 x 22-1/8
BACKINGS for Window Card Posters   14-1/8 x 22-1/8
Description:
.040 Buffered, Acid Free Board.
Museum Grade Archival.

Buffered. All white.
.040 Buffered, Acid Free Board.
Museum Grade Archival.
Base SKU: kaf40wcp

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BACKINGS for Window Card Posters   14-1/8 x 22-1/8"
BACKINGS for Window Card Posters   14-1/8 x 22-1/8
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: kwcpfc

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BACKINGS for Window Card Posters   14-1/8 x 22-1/8"
BACKINGS for Window Card Posters   14-1/8 x 22-1/8
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: kwcpac

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BACKINGS for Insert Posters   14-1/8 x 36"
BACKINGS for Insert Posters   <NOBR>14-1/8 x 36" />
Description:
.1875" thick, C-Flute, white on 2 sides.
Short Term Storage.

.125 thick Corrugated Cardboard.
Short Term Storage.
Base SKU: kip

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BACKINGS for Insert Posters   14-1/8 x 36.
BACKINGS for Insert Posters   <NOBR>14-1/8 x 36.</NOBR>
Description:
.028 thick Acid Free Board.
Long Term Storage.

White both sides.
.028 thick Acid Free Board.
Long Term Storage.
Base SKU: kaf28ip

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BACKINGS for Insert Posters   14-1/8 x 36.
BACKINGS for Insert Posters   <NOBR>14-1/8 x 36.</NOBR>
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: kaf40ip

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BACKINGS for Insert Posters   14-1/8 x 36.
BACKINGS for Insert Posters   <NOBR>14-1/8 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: kipfc

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BACKINGS for 16 x 20" Stills. 16 x 20-1/4.
BACKINGS for 16 x 2016 x 20-1/4." />
Description:
.1875" thick, C-Flute, white on 2 sides.
Short Term Storage.

Base SKU: ks1620

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BACKINGS for 16 x 20 Stills.
BACKINGS for 16 x 20 Stills.
Description:
16 x 20"
.028 thick Acid Free Board.

Long Term Storage.

White on both sides.
16 x 20"
.028 thick Acid Free Board.
Base SKU: kaf28s1620

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BACKINGS for 16 x 20 Stills. 16 x 20-1/4.
BACKINGS for 16 x 20 Stills. 16 x 20-1/4.
Description:
.040 Buffered, Acid Free Board.
Museum Grade Archival.

Buffered with 3% calcium carbonate. White all the way through.
.040 Buffered, Acid Free Board.
Museum Grade Archival.
Base SKU: kaf40s1620

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BACKINGS for 16 x 20 Stills. 16 x 20-1/4.
BACKINGS for 16 x 20 Stills. <NOBR>16 x 20-1/4.</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: ks1620fc

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BACKINGS for 18 x 24" Prints.
BACKINGS for 18 x 24
Description:
18 x 24"
.1875" thick, C-Flute, white on 2 sides.

Note: 15 quantity can only be purchased when ordering for poster displays.
Base SKU: k1824

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BACKINGS for 18 x 24 Prints.
BACKINGS for 18 x 24 Prints.
Description:
18 x 24"
.028 thick Acid Free Board.

Long Term Storage.

White both sides.
18 x 24"
.028 thick Acid Free Board.
Base SKU: kaf281824

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BACKINGS for 18 x 24 Prints. 18 x 24.
BACKINGS for 18 x 24 Prints. 18 x 24.
Description:
.040 Buffered, Acid Free Board.
Museum Grade Archival.

White all the way through.
.040 Buffered, Acid Free Board.
Museum Grade Archival.
Base SKU: kaf401824a

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BACKINGS for 18 x 24 Prints. 18 x 24.
BACKINGS for 18 x 24 Prints. 18 x 24.
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: k1824fc

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BACKINGS for Rock & Personality Posters.   20 x 28".
BACKINGS for Rock & Personality Posters.   20 x 28
Description:
.1875" thick, C-Flute, white on 2 sides.
Short Term Storage.

Base SKU: krpp

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BACKINGS for Rock & Personality Posters.   20 x 28.
BACKINGS for Rock & Personality Posters.   20 x 28.
Description:
.028 thick Acid Free Board.
Long Term Storage.

White both sides.
.028 thick Acid Free Board.
Long Term Storage.
Base SKU: kaf28krpp

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