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Make a Custom Printed Double Sided No. 10 Business Envelope From a Sheet of Paper

Step 5Glue Side Flaps and Bottom

Glue Side Flaps and Bottom
Open the top flap back up, and the bottom flap back down.

With your glue stick, apply a line of glue near the sides of the bottom flap from the fold to the angled corner. This line of glue will adhere to the side flap, which conveniently is approximately the width of a glue stick.

When you have a line of glue on both sides, fold the bottom flap back up and smooth to bond the glue joint.

Congratulations! You just finished your plain envelope. All that is left is stuffing it with whatever you are mailing, and closing the top flap. You can either use a thin line glue stick line (hold at an angle and use the edge) or a piece of tape or a sticker to close the flap.

Proceed to the next step to learn how to make exciting graphics on your envelope.
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Author:hanoverhsengineering
We are a high school engineering program dedicated to applying math and science principles to projects and competitions.