Acid-free paper archive box: double mounted with 340 grams of acid-free paper.
Kraft paper archive box: cardboard paper used for general cartons, about 250 grams (not kraft paper in the strict sense)
Acid-free paper archive box: 680 grams of acid-free paper with a thickness of one millimeter after double mounting
Kraft paper file box: about 250 grams of cardboard paper, about 0.7 mm after double mounting
3. Color and flatness
Acid-free paper file box: uniform color, light color, smooth and smooth paper surface
Kraft paper file box: uneven color earthy yellow, large color difference, rough surface
Acid-free paper archive boxes: can be printed and produced according to customer requirements for archive boxes of different specifications
Kraft paper archive box: Only the fixed cover format can be selected. The acid content of the paper used for the archive file box printed with the word "archive box" is an indicator of its life. It can be measured with a pH value between 0 and 14.0 , Acid-free paper refers to paper made with a pH of 7.0 or higher, and the service life can be as long as two hundred years.
The acid-free paper archive box is made of acid-free paper with a PH value of 7.0-8.5, while the kraft paper archive box is made of cardboard. The acid-free paper box has a thickness of 1mm after double mounting, 680 grams, uniform color, The color is light, and the surface of the paper is smooth and smooth. The kraft file box cardboard paper is about 250 grams, and it is about 0.7mm after double mounting. The surface color is uneven, the color difference is relatively large, and the surface is relatively rough.
It can be seen that there are still some differences between acid-free paper archive boxes and kraft paper archive boxes in many aspects. It is recommended that you should pay attention to clarify the difference between the two when choosing, and you must also combine your own needs. Acid-free paper and kraft paper have their own merits, and the choice is targeted, which can make the use easier.