Flash paper may also be used to evaluate combustion in varied orientations

https://privatebin.net/?c76dd46ccbb89959#CdBQhPnw2D3EHTL4fXysYM35TSUaSwRP9RuWtmkBZWxb

Flash paper is additionally used to compare combustion in varied orientations. Vertical versus horizontal placement affects how the flame travels throughout the thin sheet.