This pack of 14 x 18" Warm White 4-Ply 100% Museum Board from Archival Methods contains 25 boards that are 1/16" thick. The board is designed for matting, mounting and preservation of fine prints, precious documents, as well as for traditional and digital photography. The 4-ply thickness is ideal for window mats and mat backing, creates a separation between artwork and glazing, and provides a flat, supportive backing.

The boards are acid- and lignin-free and use alkaline or neutral sizing. No brightening agents are used and no yellow cast is present. All boards are buffered with calcium carbonate to ensure that a polluted environment won't cause paper's pH value to decrease with age.

Thickness 1/16"    100% Cotton Fiber (99% Alpha Cellulose)    Acid-Free    Archival Grade    Calcium Carbonate Buffered

Made from 100% Cotton fiber pulp (99% Alpha Cellulose). Does not contain any post consumer waste recycled pulp. Paper is free of metal particles, waxes, plasticizers and residual bleach peroxide. Sulfur content is less than 0.0008% reducible sulfur. Iron content does not exceed 150 ppm and copper does not exceed 6 ppm. No optical brightening agents are used in the pulp

Alkaline sizing is used for both internal and external sizing. No alum is used in the manufacturing process

Calcium carbonate buffered with 2 to 3% alkaline reserve

Acid-free

Light-fast and non-bleeding color dyes

Won't degrade or harm mounted matted artwork

Board passes the PAT (Photographic Activity Test) ISO 14523 (formerly ANSI IT9.16)

Lignin content is tested by TAPPI 236 cm-85 and has a Kappa number of less than five

Single ply sheets are laminated together using all natural starch adhesive

Related Questions and Answers

Q: 1. Hi how many gsm is 2 ply and 4 ply?

A: 2-ply ≈ 260 g/m2 3-ply ≈ 390 g/m2 4-ply ≈ 520 g/m2

Q: 2. Is the color bright white, normal white or is it a yellowish white?I'm required to get white acid free mounting board 4 ply 11x14 so I don't know if this will work for my darkroom black and white prints.Thanks!

A: I'd say it is a light cream white. It definitely fits some photos much better than the usual harsh gallery white.

Q: 3. Can you tell me the thickness of these boards? Looking for 1/2" thickness. And are they self adhesive on 1 side?

A: They are about 1/16" of an inch thick. They are not self adhesive as that would not be considered archival grade. We have precut 13x19" https://bhpho.to/2LeKTD8 or you can cut your own.

Q: 4. Is the surface smooth, like hot press, or slightly pebbly, like cold press?

A: These boards have a smooth surface.

Q: 5. What is the thickness of these boards?

A: Per Archival Methods website: approximately 1/32 of an inch.

Q: 6. Is it for printing right on board , or is it adhesive board?

A: Thank you.

Q: 7. Is the core white?

A: Yes it is.

Q: 8. Is 8x10 the size of the back board or the size of the window? I am thinking the size of the back board, but would like to be sure. Thanks.

A: Its the size of the whole board. There are no windows.

Q: 9. Is this mat board full sheet? In other words, it does not have a pre=cut window. The reason I am asking is that I produce a lot of custom sizes, so I cut my own windows. Thanks.

A: This product is 16 x 20" (41 x 51 cm) and no cut out.

Q: 10. Hi how many gsm is this board?

A: 120 GSM.