Use 20–24 lb (75–90 g/m²) bond paper. Standard A4 or 8.5" x 11" letter-size printer paper is usually the gold standard for distance and stability.
For the sharpest, most accurate creases, experts often use a tool to press down the folds rather than just their fingernails. vid_787.mp4
If "Proper Paper" refers to a specific brand or product mentioned in a "vlog" or review style video, it may be the Proper Papers brand of rolling papers, which are frequently featured in viral short-form videos. Use 20–24 lb (75–90 g/m²) bond paper
How to make a paper airplane - BEST PAPER PLANE that Flies FAR most accurate creases