White I19 envelopes with air cushioning (bubble envelopes) are made from strong 80-gram paper. The paper is additionally coated with polyethylene (PE). The bubble wrap, weighing 40 g, is very lightweight. The bubble wrap is glued to the entire surface of the paper inside the envelope. This ensures additional strength and better protection for the envelope during transit. The envelopes are easily sealed with a 20 mm wide silicone tape featuring strong adhesive. This prevents accidental opening during transport.
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