What does Stiftung Warentest say about the diary?
A Diary with lock test we look in vain among the experts and rely on them own research. We recommend taking a look at the quality of paper to help you make the right choice:
Weight and usage
80 - 100 gsm
Standard office paper is perfectly adequate for simple printouts, photocopies or faxes.
110 - 120 gsm
High-quality paper for official or business documents, such as writing paper or brochures.
130 - 170 gsm
Strong paper, it can be used for flyers, posters and the inside of brochures.
170 - 200 gsm
From a thickness of 170 g / m², paper is called cardboard. It is suitable for the outside of brochures or magazines, high-quality posters and flyers printed on both sides.
200 - 250 gsm
Stronger cardboard, suitable for the stable outside of brochures and magazines. Used for postcards, for example.
300 - 400 gsm
The ideal paper thickness for business cards. Can also be used for the outside of brochures, but is no longer that easy to work with due to its thickness.
More than 400 g / m²
Stronger cardboard, e.g. suitable for high quality business cards.