"PERMANENT" paper is understood to mean that under normal conditions of use and packaging there is no significant change in its visual appearance and internal strength for at least 100 years.

In a more technical and precise way, in order to be classified as "PERMANENT PAPER" the product must comply with the international standards of procedures of analysis methods as well as minimum specifications. The European standard, accepted internationally, ISO 9706 requires:

pH between 7.5 and 10

Oxidation resistance with kappa number less than 5;

Alkaline reserve 20 grams of calcium carbonate per kg of paper;

Tear strength: minimum 350 Mn in papers with more than 70grs.

Kaji Natural is a beautiful handmade Japanese paper is created from 80% Thai kozo and 20% Pulp, cooked with caustic soda and dried on stainless steel. It is a natural, medium weight paper that is great for conservation, woodcuts and letterpress.

Sheet Size: 980 x 640mm
Material: Thai Kozo and Pulp
Weight: 26gsm

This Japanese paper is flexible, translucent and made from long Kozo fibres which are both light and strong.

Spider tissue is unbuffered with a pH 7.2 developed for repair work in painting and paper conservation.

Being extremely soft and strong for its weight it will be suitable for very delicate works of art. The natural colour and wet strength makes the tissue ideal for wet repairs giving a clear strong repair.

Size: 965mm x 20m
Weight: 5gsm

Tengucho is also another term for Tengujo

A variety of the highest quality Japanese Hinging Papers allows you to select the proper thickness and strength for your particular application. The five papers included in the assortment have different weights and finishes, one just right for your job.

• Sekishu Kozogami Tsuru (one 720 x 520mm 22gsm handmade, 100% kozo, lightweight with laid finish sheet)

• Sekishu White (one 990 x 610mm 30gsm long fibre sheet)

• Sekishu Natural (one 990 x 610mm 30gsm long fibre sheet)

• Kizukishi (one 940 x 640mm 11-12gsm, 100% kozo, silky, long fibre sheet)

• Mulberry (two 850 x 640mm 42gsm sheets) handmade, kozo and sulphite pulp, long fibre, lightweight, strong and soft.

For making document covers, envelopes, folders, as an interlayer, and as a photo holder. White.

Available with 80grs, 120grs, 160grs, 180grs or 240grs.

Packages of 500 sheets in the dimensions 70x100cm.

GLASSINE acid-free paper, without alkaline reserve, made from selected chemical pulp, for conservation uses. The transparency of the paper is obtained without the use of salts, additives or surface chemical treatments. Smooth surface to the touch.

pH minimum 6.8, weight 41grs.

Available in sheets in the dimensions 61x91cm, in packages of 500 sheets.

Available in coils with 1.5 x 91mt.

Use: To interlayer/detach documents or photos, as transparent protection in envelope shapes, covers, etc.; as a protection to works of art.

Blotter paper 100% cotton, 350grs / m2. With alkaline reserve of calcium carbonate, pH 8.5. Thickness 650 microns. Its large absorption capacity makes it ideal for drying engravings and documents after washing, treatment and restoration. Ensures hygrometric balance as interlayer between works, avoiding its physical deformation.

Available in 50-sheet packages.

Dimension sheets: 80 x 120cm

250grs blotter paper, lithium-free, acid-free, with excellent absorption power. Thickness 400 microns. Ideal for preservation and restoration operations, for document drying, for lining shelves, for support during hygienization operations, etc. The sheets can be used and reused several times. Available in packs of 25 sheets or roll.

Sheets dimensions: 50cm x 65cm.

Coils dimensions: 25x0.80cm

16grs acid-free paper, semi translucide, with countless forms of use in Archives, Libraries and Museums. Its very smooth surface makes it ideal for wrapping and protecting graphic documents, textiles, works of art, or as interlayer for documentation, photography, etc. Available in sheets in the following dimensions: 65x100cm or 65x50cm. Available in coils in the following dimensions: 1016mm x 76mt. For packaging and transport of works of art we also offer an acid-free paper of 18grs or 22 grs, more economical, in coil.

This high-quality, buffered archive paper in PREMIUM PLUS quality meets the highest conservation requirements (ISO 16245, DIN ISO 9706, PAT, FSC-certified) and can, for example, be used within collections as a securing intermediate layer.

It is acid-free, pH-neutral and made from 100% pure cellulose fibres, which guarantees high ageing resistance. Available in A4, A3, Folio format.

The range consists of Archival Kraft (120grs), Manilla (225grs) and Cover (300grs), and it is available in three colors, grey, cream and brown. Any of the cardboards have excellent cutting and folding properties and are thus suitable for carrying various types of wrapping - covers, sheets, folders, envelopes, pouches, interlayer or carrier.

Characteristics:

Chemically refined lignin-free paste

Acid-free

pH 8.5

Alkaline reserve of 3% calcium carbonate

Available in three grams - 120Grs, 225 Grs and 300 Grs

Available in three colors - Grey, Cream and Brown

Designed to protect books from deterioration caused by improper handling, atmospheric pollution, dust, environmental conditions, etc., this cardboard is ideal for making custom-made packages whenever the dimensions of the books requires it. This cardboard complies with the most demanding standards for packaging, providing an ideal mini-environment for books, papers, photographs, prints, etc. According to the most demanding standards in terms of chemical composition, it simultaneously offers excellent strength and stiffness.

Laminate - grey, cream or brown on one side and white on the other. The exterior color resists dust and abrasion, while the soft white interior was thought to minimize the abrasion to the contents and was approved at the PAT (Photographic Activity Test). Suitable for holding boxes.

Available in grey / white, brown / white, cream / white.

Characteristics:

pH 7.5- 9.5

Alkaline reserve

No lignin, no acids

PH 7.0 Adhesive without plasticizers

Approved at the PAT (Photo Activity Test)

Available in three thicknesses - 650μ, 1000μ, 1300μ