A clear submission takes only a few extra minutes and makes the result far more useful to other people.
Choose a suitable surface
Select an outdoor surface and note its surrounding environment. Avoid locations that would reveal a private home address unless you are comfortable with the public map position.
Take a useful photograph
Use diffuse daylight, keep the tube in focus and avoid strong colored light. The photograph should show the final color after the complete reaction time.
Add a short factual note
Describe relevant conditions such as moisture, recent cleaning or unusual residue. Keep the description factual and avoid claims that go beyond the visual test result.