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KOBRA Guarantee

We use only proven raw materials to manufacture our albums. The foils used for the stock sheets of our stamp albums, sheet albums and protective covers are guaranteed to be free from plasticizers and acids. We give you this guarantee because many transparent foils contain plasticizers that are harmful to the stamps.

Topic lead sulfide damages to stamps

For some time there has been a controversial discussion about possible color changes in classic stamps, which were printed before about 1875 and were stored between rigid PVC plastic films. A reaction of lead-containing printing inks with stabilizers of this film is suspected. However, a number of independent reports have not been able to prove a causal relationship.

From about 1875 stamps were usually printed with synthetic colors. These are not affected by this problem.

Until now, we do not know from color changes in stamps, which are stored in KOBRA albums.

Of course, we can not completely exclude a risk. Please note that plastic films can offer no or only limited protection against various environmental influences such as sunlight, moisture, air pollutants and high temperatures. We therefore recommend that you regularly check your collectibles for changes.

Much of our products has been made for more than 50 years from plastic films whose neutral behavior is highlighted in various publications in this context (polypropylene, polyethylene and polyester). The rigid PVC film used by us is plasticizer and acid-free.

Below we inform you about the plastic films we use:

Product Artikel Number Material of Pages    Application
Small cover albums G3 bis G9 polypropylene Letters, envelopes, documents, postcards, FDCs
Patent box KS polystyrene, cardboard Stock cards
Stock cards cardboard K01 bis K06
K1G bis K5G
rigid PVC, cardboard Stamps, blocks, sheetlets, banknotes
Stock cards plastic K11 bis K16 rigid PVC Stamps, blocks, sheetlets, banknotes
Protectiv sleve to slip over KH rigid PVC Stock cards
Index cards KR cardboard Stock cards
Storage box KS1 polystyrene Stock cards
Storage system KS2 sheet steel Stock cards
Stock sheets system Combi E11 bis E28 rigid PVC Stamps, blocks, sheetlets, envelopes, banknotes, documents
Interleaving pages RA, RB, RC cardboard  
Interleaving page RZ polypropylene  
Stamps protection sleeve E10 polypropylene size A4
Double FDC albums G22, G24, G12P, G12S
G21E bis G23E
G11E bis G13E
rigid PVC, cardboard letters, envelopes, documents
Plain page V2E cardboard Stamps, documents
ETB albums G15, G15E
G17, G17E
polypropylene ETBs, size A5
ETB albums G18, G18E rigid PVC ETBs, size A5
Small postcard albums G172, G172E
G30, G32E
polypropylene Postcards, photos
Small postcard albums G182, G182E rigid PVC Postcards, photos
Liebig picture album G40
G41E bis G47E
rigid PVC Collection cards, Liebig-cards
Stock album G54
G51E bis G59E
polypropylene Postcards, stock cards, size A4, documents, collection cards
Stock page G64E rigid PVC Postcards
Large postcard albums AK11 bis AK26 rigid PVC Postcards, documents, collection cards
Interleaving pages AK1C, AK2C cardboard  
Telephone card albums G28, G29, G14
G28E, G14E
rigid PVC Telephone cards
Interleaving pages G23C
G28A, G28C, G28D
G14A, G14C
Sheet albums B2, B8 polypropylene sheetlets
Sheet albums B3 bis B7, B9 polypropylene, glassine Stamp sheets, posters, newsletters
Euro coins strip FE8 rigid PVC, polypropylene Euro coins
Coin pockets FT1, FT1G
polypropylene Coins
Drying book T2 blotting paper, polyethylene  
Approval cards VL3, VL4, VK3, VK4
VR3, VR4, VF3, VF4
VK3U, VM5, VT5
PET, cardboard

Approval cards VK4T rigid PVC Stamps
Protective covers T11 bis T36 polypropylene Various
Protective covers T71 bis T96 rigid PVC Various
Protective covers T74-PET bis T83Q-PET PET Various

Polyethylene = PE
Polypropylene = PP
PVC = Polyvinylchlorid
PET = Polyethylenterephthalat (Polyester)

More detailed product data can be found in the shop at the specifications of the individual products.

* incl. tax, plus shipping