Box of 500 white envelopes featuring a 45 x 90 mm window on the left side (20 mm from the left and 15 mm from the bottom) and a self-adhesive strip. The envelopes measure 110 x 220 mm (DL or EA5/6) and are from the Clairefontaine Clairalfa brand. The paper weight is 80 g/m².

The paper used for the envelopes has a high whiteness of 171 CIE and a good texture for easier handling. Its surface is optimized for excellent color reproduction.

The envelopes have a good flatness, which is essential for handling stacks. The inside print of the envelope is gray, using water-based ink to ensure the confidentiality of letters. The window is made of 35-gram transparent paper, providing 85% transparency.

The Clairalfa envelopes feature a reinforced closure and are delivered in practical, reusable boxes from the printer.

The envelopes are made from FSC-certified paper.

Thickness: 120 µm
Volume: 1.36 cm³/g
Bendtsen roughness: 120 ml/min
Opacity: 94%.