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Postcard Backings come in three grades of board:Postcard Backings

Economy: 0.030" thick, pH neutral chipboard, white one side. Short-term storage.
Standard Acid-free: 0.028" thick, acid-free cardboard, white both sides. Long-term storage.
Super-Archival: 0.040" thick, 100% Alpha Cellulose board, off-white, acid-free (alkaline pH 8.5). Lignin-free (alkaline pH 8.5). Conservation grade. Indefinite storage.

Regular Postcard Backings. 3-1/2 x 5-5/8".
0.030" thick chipboard.
White on one side. Short-term storage.
Description:
Regular Postcard Backings
3-1/2 x 5-5/8"

0.030" thick, pH neutral chipboard.
White on one side. Short-term storage.

Use with: SPCR2, SPCR4, SPPPCR poly sleeves.



Base SKU: kcb30pcr

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Regular Postcard Backings. 3-1/2 x 5-5/8".
0.028" thick acid-free board.
White both sides. Long-term storage.
Description:
Regular Postcard Backings
3-1/2 x 5-5/8"

0.028" thick, acid-free board.
White both sides. Long-term storage
.

Use with: SPCR2, SPCR4, SPPPCR poly sleeves.


Base SKU: kaf28pcr

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Regular Postcard Backings. 3-1/2 x 5-5/8".
0.040" thick acid-free, lignin-free, buffered board.
All white. Indefinite storage.
Description:
MUSEUM GRADE 
Regular 
Postcard Backings
3-1/2 x 5-5/8"

0.040" thick, acid-free, lignin-free buffered board. 

All white. Indefinite storage.

Use with: SPCR2, SPCR4, SPPPCR poly sleeves.



Base SKU: kaf40pcr

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Regular Postcard Backings. 3-1/2 x 5-1/2".
0.040" thick. Acid-free, lignin-free, buffered board.
All white. Indefinite storage.
Description:
MUSEUM GRADE
Regular Postcard Backings
3-1/2 x 5-1/2"

0.040" thick, acid-free, lignin-free, buffered board.
All white. Indefinite storage.

Use with: S35R, SLV35 polyester (mylar) sleeves.



Base SKU: kaf4035

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Large Postcard Backings. 4-3/8 x 6-1/4".
0.030" thick chipboard.
White on one side. Short-term storage.
Description:
Large Postcard Backings
4-3/8 x 6-1/4"

0.030" thick, pH neutral chipboard.
White on one side. Short-term storage.

Use with: SPCL2, SPCL4, SPPPCL poly sleeves.



Base SKU: kcb30pcl

Related Products and Reviews

Large Postcard Backings. 4-3/8 x 6-1/4".
0.028" thick acid-free board.
White both sides. Long-term storage.
Description:
Large Postcard Backings
4-3/8 x 6-1/4"

0.028" thick, acid-free board.
White both sides. Long-term storage. 

Use with: SPCL2, SPCL4, SPPPCL poly sleeves.



Base SKU: kaf28pcl

Related Products and Reviews

Large Postcard Backings. 4-3/8 x 6-1/4".
0.040" thick. Acid-free, lignin-free, buffered board.
All white. Indefinite storage.
Description:
MUSEUM GRADE
Large Postcard Backings
4-3/8 x 6-1/4"

0.040" thick, acid-free, lignin-free, buffered board.
All white. Indefinite storage.
 
Use with: SPCL2, SPCL4, SPPPCL poly sleeves.



Base SKU: kaf40pcl

Related Products and Reviews

Large Postcard Backings. 4 x 6".
0.040" thick, acid-free, lignin-free, buffered board.
All white. Indefinite storage.
Description:
MUSEUM GRADE
Large Postcard Backings

4 x 6"
0.040" thick, acid-free, lignin-free, buffered board.
All white. Indefinite storage.

Use with: SP46R, SLV46 polyester (Mylar) sleeves.


Base SKU: kaf4046

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